Patent Application
20220213369
The present invention is directed to the use of fluorinated alkene compounds, such as, heat transfer materials.
There is interest in low temperature heat utilization (i.e., heat at temperatures lower than about 300° C.). Such heat may be extracted from various commercial, industrial or natural sources. Elevation of the temperature of available heat through high temperature mechanical compression heat pumps (HTHPs) to meet heating requirements and conversion of the available heat to mechanical or electrical power through Organic Rankine Cycles (ORCs) are two promising approaches for the utilization of low temperature heat.
ORCs and HTHPs require the use of working fluids. Working fluids with high global warming potentials (GWPs) currently in common use for HTHPs and ORCs (e.g. HFC-245fa) have been under review and there is a need for more environmentally sustainable working fluids for HTHPs and ORCs. More specifically, there is a need for low GWP working fluids with boiling points higher than about 50 degrees Celsius (hereinafter “° C.”) that are particularly suitable for conversion of heat available at temperatures approaching or exceeding 200° C. to power and for heating at temperatures approaching 200° C. from heat available at lower temperatures. Even more specifically, a low GWP working fluid with a boiling point close to that of ethanol (78.4° C.) could be advantageous as a replacement of ethanol in ORC systems for heavy duty vehicles (e.g., trucks) especially in Europe. Such a fluid could also be used as a solvent and as a heat transfer fluid for various applications, including immersion cooling and phase change cooling (e.g., of electronics, including data center cooling).
Fluoroalkenes, such as, F23E (C2F5CH═CHC3F7) can be prepared from F-heptene-3 starting material using a four-step preparation including sequential hydrogenation/dehydrofluorination process. However, this process is lengthy and is based on relatively expensive starting materials (F-heptene is made using the reaction of hexafluoropropene (HFP) and 2 moles of tetrafluoroethene (TFE)).
WO 2008/057513 describes a process for the preparation of internal dihydrofluoroolefins of the formula RCH═CHC2F5, comprising reacting a fluorinated olefin of the RCH═CHF, wherein R is selected from perfluoroalkyl groups having from one to ten carbon atoms, and the said alkyl group is either an n-alkyl chain, a sec-alkyl chain, or an iso-alkyl chain, in the liquid phase with tetrafluoroethylene, in the presence of an antimony pentafluoride (SbF5) catalyst, removing the Lewis acid catalyst and isolating the dihydrofluoroolefin. The disclosure of WO 2008/057513 is hereby incorporated by reference.
The invention is summarized by various embodiments. One embodiment of the invention relates to a process for transferring heat, comprising:
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (4)
One embodiment of the invention relates to any combination of the foregoing embodiment wherein the compound of formula (4) includes 1,1,1,2,2,5,5,6,6,7,7,7-dodecafluorohept-2-ene, C3F7CH═CHC2F5(F23E).
One embodiment of the invention relates to any combination of the foregoing embodiments wherein the co-compound includes:
Another embodiment of the invention relates to a process for transferring heat, comprising:
RfCH═CHF (1)
CX1X2═CX3X4 (2)
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (3)
One embodiment of the invention relates to any combination of the foregoing embodiments, wherein the compound of formula (3) includes 1,1,1,2,2,5,5,6,6,7,7,7-dodecafluorohept-2-ene, C3F7CH═CHC2F5(F23E).
One embodiment of the invention relates to any combination of the foregoing embodiments, wherein the co-compound includes:
Another embodiment of the invention relates to a process for treating a surface, comprising:
Another embodiment of the invention relates to a cooling, heating or power generation system, comprising:
One embodiment of the invention relates to any combination of the foregoing embodiments, where the condenser is operated at a temperature higher than 100° C.
Another embodiment of the invention relates to a heat pipe system comprising:
Another embodiment of the invention relates to a process for recovering heat from a heat source and generating mechanical energy, comprising the steps of:
RfCF3(CX5X6CX7X8),CH═CHCX9X10CX11X12F (4)
Another embodiment of the invention relates to a high temperature heat pump apparatus, said apparatus comprising (a) a first heat exchanger through which a working fluid flows and is heated; (b) a compressor in fluid communication with the first heat exchanger that compresses the heated working fluid to a higher pressure; (c) a second heat exchanger in fluid communication with the compressor through which the high pressure working fluid flows and is cooled; and (d) a pressure reduction device in fluid communication with the second heat exchanger wherein the pressure of the cooled working fluid is reduced and said pressure reduction device further being in fluid communication with the evaporator such that the working fluid then repeats flow through components (a), (b), (c) and (d) in a repeating cycle.
One embodiment of the invention relates to any combination of the foregoing embodiments, wherein at least one of the first working fluid or the second working fluid comprises a composition comprising a compound of formula (4),
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (4)
In an embodiment, a process for transferring heat includes providing an article and contacting the article with a heat transfer media. The heat transfer media includes a composition which includes a compound of formula (4), RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F. In the compound of formula (4) Rf is a C1-C10 perfluorinated alkyl group, X5, X6, X7, X8, X9, X10, X11, and X12 are each independently H, Cl, or F, n is an integer of 0 or 1, and the total number of F represented by X5, X6, X7, X8, X9, X10, X11, and X12 is at least two.
The heat transfer media can additionally include one or more co-compounds.
In another embodiment, a process for transferring heat includes providing an article and contacting the article with a heat transfer media. The heat transfer media includes a composition formed by the process of contacting a compound of formula (1), RfCH═CHF, with a fluorinated ethylene compound of formula (2), CX1X2═CX3X4. In the compound of formula (1), Rf is a C1-C10 perfluorinated alkyl group. In the compound of formula (2), X1, X2, X3, and X4 are each independently H, Cl, or F and at least one of X1, X2, X3, or X4 is F. The contacting is performed in the presence of a Lewis acid catalyst in an amount sufficient to form a composition comprising a compound of formula (3), RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F. In the compound of formula (3), X5, X6, X7, X8, X9, X10, X11, and X12 are each independently H, Cl, or F and the total number of each of H, Cl, and F represented by X5, X6, X7, X8, X9, X10, X11, and X12 is the same as the total number of each of H, Cl, and F provided by the fluorinated ethylene compound of formula (2).
The heat transfer media can additionally include one or more co-compounds.
In another embodiment, a process for treating a surface includes providing a surface and contacting the surface with a treatment composition. The surface includes a treatable material deposited thereon. The treatment composition comprises a composition comprising 1,1,1,2,2,5,5,6,6,7,7,7-dodecafluorohept-2-ene, C3F7CH═CHC2F5(F23E).
The treatment composition can additionally include one or more co-compounds.
In another embodiment, a refrigeration system, including an evaporator, a condenser, a compressor, an expansion device, and a heat transfer media. The heat transfer media comprises a composition comprising 1,1,1,2,2,5,5,6,6,7,7,7-dodecafluorohept-2-ene, C3F7CH═CHC2F5(F23E).
The treatment composition can additionally include one or more co-compounds.
In another embodiment, a heat pipe system including a heat pipe having a working fluid therein. The working fluid comprises a composition comprising 1,1,1,2,2,5,5,6,6,7,7,7-dodecafluorohept-2-ene, C3F7CH═CHC2F5(F23E).
The working fluid can additionally include one or more co-compounds.
In another embodiment, a process for transferring heat, including providing an article and contacting the article with a heat transfer media. The heat transfer media comprises a composition comprising a compound of formula (4), RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (4). In the compound of formula (4), Rf is a C1-C10 perfluorinated alkyl group, X5, X6, X7, X8, X9, X10, X11, and X12 are each independently H, Cl, or F, n is an integer of 0 or 1, and the total number of F represented by X5, X6, X7, X8, X9, X10, X11, and X12 is at least two.
The heat transfer media can additionally include one or more co-compounds.
Suitable co-compounds useful in conjunction with the working fluids, treatment compounds, and heat transfer media described above include (E)-1,1,1,4,4,4-hexafluoro-2-butene, (HFO-1336mzz(E), CF3CH═CHCF3), (Z)-1,1,1,4,4,4-hexafluoro-2-butene, (HFO-1336mzz(Z), CF3CH═CHCF3), (E)-2,3-bis(trifluoromethyl)oxirane, (HFO-1336mzz(E)(Epoxide), CFCH(—O—)CHCF3), (Z)-2,3-bis(trifluoromethyl)oxirane, (HFO-1336mzz(Z)(Epoxide), CFCH(—O—)CHCF3), HFO-1234ze(Z), HFO-1234ye(E), HFO-1234ye(Z), HFO-1438mzz(E), HFO-1438mzz(Z), Heptafluoro-4-(trifluoromethyl)-pent-2-ene, ((HFO-153-10mzzy), (mixtures of HFO-153-10 isomers)), HFO-162-13mcyz, HFO-162-13mczy, (E)-1,3,4,4,4-pentafluoro-3-(trifluoromethyl)-1-butene, (HFO-1438ezy(E), CFH═CHCF(CF3)2), (Z)-1,3,4,4,4-pentafluoro-3-(trifluoromethyl)-1-butene, (HFO-1438ezy(Z), CFH═CHCF(CF3)2), HFO-1336ze(E), HFO-1336ze(Z), HFC-245fa, HFC-245ea, HFC-365mfc, HFC-43-10mee, (E)-1-chloro-3,3,3-trifluoro-propene, (HCFO-1233zd(E), CHCl═CHCF3), (Z)-1-chloro-3,3,3-trifluoro-propene, (HCFO-1233zd(Z), CHCl═CHCF3), HCFO-1224yd(E), HCFO-1224yd(Z), iso-pentane, n-pentane, cyclo-pentane, n-hexane, cyclohexane, heptane, methyl formate, dimethoxymethane, dimethoxyethane, propanal, methanol, ethanol, isopropanol, n-propanol, trans-1,2-dichloro-ethylene, cis-1,2 dichloro-ethylene, 1-methoxyheptafluoropropane (HFE-7000, CH3OCF2CF2CF3), methyl nonafluorobutyl ether (HFE-71 DA, C4F9OCH3), methoxy-nonafluorobutane (HFE-7100, C4F9OCH3, CH3O-3(CF2)—CH3), ethoxy-nonafluorobutane (HFE-7200, CH3CH2OCF2CF2CF2CF3, C4F9OC2H5), dodecafluoro-2-methylpentan-3-one (NOVEC-649 or Novec-1230; CF3CF2C(O)CF(CF3)2), 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-(trifluoromethyl)-pentane (Novec-7300; C7H3F13O; n-C2F5CF(OCH3)CF(CF3)2), siloxanes, methyl perfluoroheptene ether, methoxy-perfluoro heptene ether or MPHE (HFX-110; C7F13(OCH3), MPPE (HFX-75), perfluorohept-2-ene/perfluorohept-3-ene (HFO-161-14myy/HFO-161-14mcyy, PFH, mixture, CF3CF═CFCF2CF2CF2CF3/CF3CF2CF═CFCF2CF2CF3), Perfluorohept-1-ene (FC-141-10cy, CF2═CFCF2CF2CF2CF2CF3), 1-bromo-1,2,3,3,3-pentafluoropropene, (R-1215ybB, CF3CF═CFBr), 2-bromo-1,1,1,3,3-pentafluoro-2-propene, (R-1215xbB1, CF3CBr═CF2), (E)-1-Bromo-2,3,3,3-tetrafluoropropene, (HBFO-1224ydB(E), CF3CF═CHBr), (Z)-1-Bromo-2,3,3,3-tetrafluoropropene, (HBFO-1224ydB(Z), CF3CF═CHBr), 2-bromo-3,3,3-trifluoro-propene, (BFO-1233xfB, CF3CBr═CH2), trans-DCE/R-1336mzz(Z) mixtures, (suitable mixtures include those disclosed in WO2008/134061), (trans-DCE/methylperfluoroheptene ethers, (suitable mixtures include those disclosed in US 2012/0227764 A1)), (trans-DCE/HFC-43-10mee mixtures, (CHCl═CHCl/CF3CHFCHFCF2CF3), (suitable mixtures include those disclosed in as disclosed in U.S. Pat. No. 5,196,137)), 2-bromo-2-chloro-1,1,1-trifluoroethane, (R-123B1, CHBrClCF3), 2,3-dichloro-3,3-difluoropropene, (R-1232xf, CClF2CCl═CH2), (E)-1,1,4,4-tetrafluoro-2-butene, (R-1345mzz(E), CHF2CH═CHCHF2), 2-bromo-1,1-difluoroethane, (BDFE, CHF2CH2Br), 1-chloro-2,3,3,4,4,4-hexafluoro-1-butene, (HCFO-1326yd-Z, CF3CF2CF═CHCl), 1-chloro-2,3,3-trifluoropropene, (HCFO-1233yd-Z, CHF2CF═CHCl), 2-(1,1,2,2-tetrafluoroethoxy)-1-fluoroethylene, (HFO-1345ezcEβγ, CFH═CHOCF2CF2H), 2,3,3,3-tetrafluoro-1-(1,1,2,2-tetrafluoroethoxy)prop-1-ene, (HFO-1438mzycEγδ, CF3CF═CHOCF2CF2H), 1-(difluoromethoxy)-2,3,3,3-tetrafluoroprop-1-ene, (HFO-1336pzEαβ, CF3CF═CHOCF2H), 2,3,3-trifluoro-1-(trifluoromethoxy)prop-1-ene, (HFO-1336mzyEαβ, CHF2CF═CHOCF3), 1,1,1,2,2,5,5,6,6,6-decafluoro-3-hexene, (F22E, C2F5CH═CHC2F5), 1,1,1,2,2,3,3,4,4,7,7,8,8,9,9,10,10,10-octadecafluoro-5-decene, (F44E, C4F9CH═CHC4F9), or 1,1,1,2,3,4,4,5,5,5-decafluoropentane, (HFC-43-10mee, CF3CHFCHFCF2CF3).
One embodiment of the invention relates to a composition formed by any combination of the foregoing methods.
The embodiments can be used alone or in combinations with each other. Other features and advantages of the present invention will be apparent from the following more detailed description, taken in conjunction with the accompanying drawings which illustrate, by way of example, the principles of the invention.
Provided is a one-step synthesis for the production of fluorinated alkenes.
Embodiments of the present disclosure, for example, in comparison to concepts failing to include one or more of the features disclosed herein, provide a one-step synthesis for the production of fluorinated alkenes. More specifically, the present disclosure provides a one-step synthesis for the production of fluorinated alkenes having a perfluorinated alkyl chain.
The process may be conducted in any reactor suitable for a vapor phase fluorination reaction. The reactor is made of a material that is resistant to the reactants employed. The reactor may be constructed from materials which are resistant to the corrosive effects of hydrogen fluoride such as stainless steel, Hastelloy®, Inconel®, Monel®, gold or gold-lined or quartz. The reactions may be conducted batchwise, continuous, semi-continuous or combinations thereof. Suitable reactors include batch reactor vessels and tubular reactors.
In an embodiment a compound of formula (1),
RfCH═CHF (1)
CX1X2═CX3X4 (2)
The temperature and pressure of the reactor are maintained at levels sufficient to effect, in the presence of a Lewis acid catalyst, the formation of a composition comprising a compound of formula (3),
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (3)
In some embodiments, the compound of formula (1) includes 1,3,3,3-tetrafluoro-1-propene, CF3CH═CHF (1234ze). In one embodiment, the compound of formula (1) is CF3CH═CHF (1234ze).
In some embodiments, the fluorinated ethylene of formula (2) includes at least one of tetrafluoro-ethene, CF2═CF2 (TFE) or CFCl═CF2 (1-chloro-1,2,2-trifluoro-ethene), CF2═CH2 (1,1-difluoro-ethene), CH2═CHF (1-fluoro-ethene), CF2═CCl2 (1,1-dichloro-2,2-difluoro-ethene), CFCl═CFCl (1,2-chloro-1,2-difluoro-ethene). In one embodiment, the fluorinated ethylene of formula (2) includes tetrafluoro-ethene, CF2═CF2 (TFE).
In one embodiment, the compound of formula (1) includes CF3CH═CHF (1234ze) and the fluorinated ethylene of formula (2) includes CF2═CF2 (TFE). The reaction of CF3CH═CHF (1234ze) and CF2═CF2 (TFE) may result in the formation of the composition including 1,1,1,4,4,5,5,5-octafluoropent-2-ene, CF3CH═CHC2F5(F12E).
If desired, the 1,1,1,4,4,5,5,5-octafluoropent-2-ene may be isolated and optionally purified prior to use. Suitable uses of 1,1,1,4,4,5,5,5-octafluoropent-2-ene include, but are not limited to, a reactive intermediate, refrigerant, heat transfer fluid, and solvent.
In some embodiments, fluorinated ethylene of formula (2) may include a plurality of compounds of formula (2). The resulting compound of formula (3) may include a plurality of compounds of formula (3). In one embodiment, the fluorinated ethylene of formula (2) may include tetrafluoro-ethene, CF2═CF2 (TFE) and 1-chloro-1,2,2-trifluoro-ethene. In a further embodiment, the compound of formula (1) may include CF3CH═CHF (1234ze).
The resulting compound of formula (3) may include 1,1,1,4,4,5,5,5-octafluoropent-2-ene, CF3CH═CHC2F5(F12E), and 4-chloro-1,1,1,4,5,5,5-heptafluoropent-2-ene CF3CH═CHCFClCF3 5-chloro-1,1,1,4,4,5,5-heptafluoropent-2-ene CF3CH═CHCF2CF2Cl, 4,5-dichloro-1,1,1,4,5,5, hexafluoropent-2-ene, CF3CH═CHCFClCF2Cl, 1,1,1,5,5,5-hexafluoropent-2-ene CF3CH═CHCH2CF3.
The molar ratio of a formula (2) compound to a formula (1) compound, which are contacted in accordance with the invention, can be used be control the composition and ratio of reaction products. In some embodiments, the compound of formula (2) and the compound of formula (1) are contacted in amounts resulting in a molar ratio of 0.01:1 to 5:1. In one embodiment, the compound of formula (2) and the compound of formula (1) are contacted in amounts resulting in a molar ratio of (2):(1) of 0.1:1 to 2:1. A contact molar ratio of about 1:1 can produce C5 compounds and a molar ratio of about 2:1 can product C7 compounds. While any desired ratio can be employed, a ratio of about 2:1 is useful. In one embodiment, the compound of formula (2) and the compound of formula (1) are contacted in amounts resulting in a molar ratio of (2):(1) of 1:1 to 2:1. In an embodiment, the compound of formula (2) is (TFE) and the compound of formula (1) is (1234ze).
The reaction conditions and stoichiometry may be selected to allow the compound of formula (3), such as, the 1,1,1,4,4,5,5,5-octafluoropent-2-ene, CF3CH═CHC2F5(F12E) described above, to act as a reactive intermediate. In some embodiments, the fluorinated ethylene of formula (2) may be provided in a stoichiometric excess with respect to the amount of the compound of formula (1). In some embodiments, the excess of the compound of formula (2), such as (TFE), allows one or more additional units of the compound of formula (2) to react with the 1,1,1,4,4,5,5,5-octafluoropent-2-ene to form additional compounds of formula (3), having an extended carbon chain. In one embodiment, the composition comprising the compound of formula (3) may include 1,1,1,2,2,5,5,6,6,7,7,7-dodecafluorohept-2-ene, C3F7CH═CHC2F5(F23E).
The reaction is typically conducted in a closed system. In some embodiments, the Lewis acid is a strong Lewis acid. In one embodiment, the catalyst is, aluminum chloride (AlCl3), or antimony pentafluoride (SbF5), or aluminum chlorofluoride AlClxF3-x. In some embodiments, for aluminum-based catalyst x may be an integer from 1 to 3. In some embodiments, x may be 0.01 to 0.5. The amount of catalyst can range from about 0.1 to about 20 weight percent of the reaction mixture, in some cases about 1 to about 15 and in some cases about 5 to about 10 wt. %.
Additional suitable strong Lewis acids may be found in (Chemical Reviews, 1996, v.96, pp. 3269-3301; a list of strong Lewis acids is given on page 3271), which is hereby incorporated by reference. In some embodiments, the reaction mixture is heated to a sub-ambient or ambient temperature. In some embodiments, the reaction mixture is heated to a temperature of −50° C. to 50° C. In one embodiment, the reaction mixture is heated to a temperature of −50° C. to 25° C. In some embodiments, the reaction is performed at a reactor pressure of 0.1 pound per square inch gauged (psig) to 300 pounds per square inch gauged (psig). In some embodiments, the reaction is performed under autogenic pressure.
In some embodiments, the formation of the compound of formula (3) may be conducted in the presence of at least one of a solvent or a diluent; depending upon whether all components of a reaction mixture are soluble. In some embodiments, the solvent or diluent is a perfluorinated saturated compound. In some embodiments, the perfluorinated saturated compound may include perfluoropentane, perfluorohexane, cyclic dimer of hexafluoropropene, (mixture of perfluoro-1,2- and perfluoro-1,3-dimethylcyclobutanes), and combinations thereof or the product of the reaction can be used as a reaction media The amount of at least one solvent or diluent can range from about 10 to about 50 volume percent of the reaction vessel, about 15 to 40 and in some cases about 20 to 30 volume percent.
In one specific embodiment, the at least one diluent or solvent comprises a reaction product formed by contacting formulas (1) and (2). The reaction product diluent or solvent can be supplied to a reaction environment by recycling a portion of a recovered reaction product in a continuous method, leaving a residual portion of the reaction product in the reaction environment in a batch method, among other suitable techniques for delivering a diluent or solvent to a reaction environment.
In one embodiment of the invention, the reaction is conducted in an environment that is free or substantially free of compounds having OH groups. Examples of such OH containing compounds are hydrocarbon grease or oil, and solvents with OH group such as water or alcohol. By substantially free, it is meant that less than 50 ppm, less than 25 ppm and in some cases less than 10 ppm of OH containing compounds are present.
Compounds of formula (3) may be used in numerous applications for the transfer of heat, such as, heat transfer fluids or refrigerants. In one embodiment, the compounds of formula (3) (e.g., a reaction product mixture obtained by contacting formula (1) and (2) compounds), are used to transfer heat from an article. The article may be contacted with a heat transfer media including at least one compound of formula (3).
In an embodiment, the heat transfer process may involve providing an article and contacting the article with the heat transfer media. The heat transfer media includes a composition comprising a compound of formula (4),
RfCF3(CX5X6CX7X8),CH═CHCX9X10CX11X12F (4)
The heat transfer media composition may further optionally include one or more co-compounds including at least one of (E)-1,1,1,4,4,4-hexafluoro-2-butene, (HFO-1336mzz(E), CF3CH═CHCF3), (Z)-1,1,1,4,4,4-hexafluoro-2-butene, (HFO-1336mzz(Z), CF3CH═CHCF3), (E)-2,3-bis(trifluoromethyl)oxirane, (HFO-1336mzz(E)(Epoxide), CFCH(—O—)CHCF3), (Z)-2,3-bis(trifluoromethyl)oxirane, (HFO-1336mzz(Z)(Epoxide), CFCH(—O—)CHCF3), HFO-1234ze(Z), HFO-1234ye(E), HFO-1234ye(Z), HFO-1438mzz(E), HFO-1438mzz(Z), Heptafluoro-4-(trifluoromethyl)-pent-2-ene, ((HFO-153-10mzzy), (mixtures of HFO-153-10 isomers)), HFO-162-13mcyz, HFO-162-13mczy, (E)-1,3,4,4,4-pentafluoro-3-(trifluoromethyl)-1-butene, (HFO-1438ezy(E), CFH═CHCF(CF3)2), (Z)-1,3,4,4,4-pentafluoro-3-(trifluoromethyl)-1-butene, (HFO-1438ezy(Z), CFH═CHCF(CF3)2), HFO-1336ze(E), HFO-1336ze(Z), HFC-245fa, HFC-245ea, HFC-365mfc, HFC-43-10mee, (E)-1-chloro-3,3,3-trifluoro-propene, (HCFO-1233zd(E), CHCl═CHCF3), (Z)-1-chloro-3,3,3-trifluoro-propene, (HCFO-1233zd(Z), CHCl═CHCF3), HCFO-1224yd(E), HCFO-1224yd(Z), iso-pentane, n-pentane, cyclo-pentane, n-hexane, cyclohexane, heptane, methyl formate, dimethoxymethane, dimethoxyethane, propanal, methanol, ethanol, isopropanol, n-propanol, trans-1,2-dichloro-ethylene, cis-1,2 dichloro-ethylene, 1-methoxyheptafluoropropane (HFE-7000, CH3OCF2CF2CF3), methyl nonafluorobutyl ether (HFE-71 DA, C4F9OCH3), methoxy-nonafluorobutane (HFE-7100, C4F9OCH3, CH3O-3(CF2)—CH3), ethoxy-nonafluorobutane (HFE-7200, CH3CH2OCF2CF2CF2CF3, C4F9OC2H5), dodecafluoro-2-methylpentan-3-one (NOVEC-649 or Novec-1230; CF3CF2C(O)CF(CF3)2), 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-(trifluoromethyl)-pentane (Novec-7300; C7H3F13O; n-C2F5CF(OCH3)CF(CF3)2), siloxanes, methyl perfluoroheptene ether, methoxy-perfluoro heptene ether or MPHE (HFX-110; C7F13(OCH3), MPPE (HFX-75), perfluorohept-2-ene/perfluorohept-3-ene (HFO-161-14myy/HFO-161-14mcyy, PFH, mixture, CF3CF═CFCF2CF2CF2CF3/CF3CF2CF═CFCF2CF2CF3), Perfluorohept-1-ene (FC-141-10cy, CF2═CFCF2CF2CF2CF2CF3), 1-bromo-1,2,3,3,3-pentafluoropropene, (R-1215ybB, CF3CF═CFBr), 2-bromo-1,1,1,3,3-pentafluoro-2-propene, (R-1215xbB1, CF3CBr═CF2), (E)-1-Bromo-2,3,3,3-tetrafluoropropene, (HBFO-1224ydB(E), CF3CF═CHBr), (Z)-1-Bromo-2,3,3,3-tetrafluoropropene, (HBFO-1224ydB(Z), CF3CF═CHBr), 2-bromo-3,3,3-trifluoro-propene, (BFO-1233xfB, CF3CBr═CH2), trans-DCE/R-1336mzz(Z) mixtures, (suitable mixtures include those disclosed in WO2008/134061), (trans-DCE/methylperfluoroheptene ethers, (suitable mixtures include those disclosed in US 2012/0227764 A1)), (trans-DCE/HFC-43-10mee mixtures, (CHCl═CHCl/CF3CHFCHFCF2CF3), (suitable mixtures include those disclosed in as disclosed in U.S. Pat. No. 5,196,137)), 2-bromo-2-chloro-1,1,1-trifluoroethane, (R-123B1, CHBrClCF3), 2,3-dichloro-3,3-difluoropropene, (R-1232xf, CClF2CCl═CH2), (E)-1,1,4,4-tetrafluoro-2-butene, (R-1345mzz(E), CHF2CH═CHCHF2), 2-bromo-1,1-difluoroethane, (BDFE, CHF2CH2Br), 1-chloro-2,3,3,4,4,4-hexafluoro-1-butene, (HCFO-1326yd-Z, CF3CF2CF═CHCl), 1-chloro-2,3,3-trifluoropropene, (HCFO-1233yd-Z, CHF2CF═CHCl), 2-(1,1,2,2-tetrafluoroethoxy)-1-fluoroethylene, (HFO-1345ezcEβγ, CFH═CHOCF2CF2H), 2,3,3,3-tetrafluoro-1-(1,1,2,2-tetrafluoroethoxy)prop-1-ene, (HFO-1438mzycEγδ, CF3CF═CHOCF2CF2H), 1-(difluoromethoxy)-2,3,3,3-tetrafluoroprop-1-ene, (HFO-1336pzEαβ, CF3CF═CHOCF2H), 2,3,3-trifluoro-1-(trifluoromethoxy)prop-1-ene, (HFO-1336mzyEαβ, CHF2CF═CHOCF3), 1,1,1,2,2,5,5,6,6,6-decafluoro-3-hexene, (F22E, C2F5CH═CHC2F5), 1,1,1,2,2,3,3,4,4,7,7,8,8,9,9,10,10,10-octadecafluoro-5-decene, (F44E, C4F9CH═CHC4F9), or 1,1,1,2,3,4,4,5,5,5-decafluoropentane, (HFC-43-10mee, CF3CHFCHFCF2CF3). In some embodiments, the co-compound includes at least one of HFO-1336mzz(E), HFO-1336mzz(Z), HFO-1234ze(Z), HFO-1234ye(E), HFO-1234ye(Z), or ethanol.
In an embodiment, the heat transfer process may involve providing an article and contacting the article with a heat transfer media. The heat transfer media includes a composition formed by a process including the steps of contacting a compound of formula (1),
RfCH═CHF (1)
CX1X2═CX3X4 (2)
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (3)
It would be appreciated by one of ordinary skill in the art that during the reaction of the compound of formula (1) and the compound of formula (2) that the bond formation may occur with either carbon of the compound of formula (2). In some embodiments, this may result in a mixture of isomers. In some embodiments, one isomer may predominate.
The heat transfer media composition may further optionally include one or more co-compounds. In one embodiment, the co-compound may be one of the co-compounds described above.
In an embodiment, the heat transfer process may include treating a surface by providing a surface and contacting the surface with a treatment composition. The treatment composition includes a composition formed by the process of, contacting a compound of formula (1),
RfCH═CHF (1)
CX1X2═CX3X4 (2)
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (3)
The surface treatment composition may further optionally include one or more co-compounds. In one embodiment, the co-compound may be the co-compound described above.
In an embodiment, the heat transfer system may include a refrigeration system. The refrigeration system includes any suitable components including an evaporator, a condenser, a compressor, an expansion device, and a heat transfer media. The heat transfer media includes a composition formed by the process of, contacting a compound of formula (1),
RfCH═CHF (1)
CX1X2═CX3X4 (2)
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (3)
In some embodiments, the condenser is operated at a temperature higher than 100° C., higher than 150° C., higher than 175° C., and/or higher than 200° C.
The heat transfer media may further optionally include one or more co-compounds. In one embodiment, the co-compound may be one of the co-compounds described above.
In an embodiment, a heat pipe system including a heat pipe having a working fluid therein. The working fluid includes a composition formed by the process of, contacting a compound of formula (1),
RfCH═CHF (1)
CX1X2═CX3X4 (2)
RfCF3(CX5X6CX7X8)nCH═CHCX9X10CX11X12F (3)
The working fluid may further optionally include one or more co-compounds. In one embodiment, the co-compound may be one of the co-compounds described above.
In some embodiments, the compound of formula (3) undergoes a phase transition from the liquid to the gaseous state at a temperature of at least 25° C., at least 30° C., at least 40° C., at least 50° C., at least 60° C., less than 140° C., less than 130° C., less than 120° C., less than 110° C., less than 100° C., less than 90° C., less than 80° C., less than 70° C., and combinations thereof. In one embodiment, the compound of formula (3) undergoes a phase transition from the liquid to the gaseous state at a temperature between 50° C. and 90° C. In one embodiment, the compound of formula (3) undergoes a phase transition from the liquid to the gaseous state at a temperature between 75° C. and 80° C.
In some embodiments, the one or more co-compound, if present, also undergoes a phase transition from the liquid to the gaseous state at a temperature within the ranges described above. In some embodiments, the one or more co-compound undergoes a phase transition from the liquid to the gaseous state at a temperature within about 5° C. of the temperature of the phase transition from the liquid to the gaseous state of the compound of formula (3). In one embodiment, the co-compound undergoes a phase transition from the liquid to the gaseous state at a temperature within 3° C. of the temperature of the phase transition from the liquid to the gaseous state of the compound of formula (3).
In a further embodiment, the compositions disclosed herein may be used in combination with at least one lubricant selected from the group consisting of polyalkylene glycols, polyol esters, polyvinylethers, mineral oils, alkylbenzenes, synthetic paraffins, synthetic napthenes, and poly(alpha)olefins.
In one embodiment, lubricants may comprise those suitable for use with refrigeration or air-conditioning apparatus. Among these lubricants are those conventionally used in vapor compression refrigeration apparatus utilizing chlorofluorocarbon refrigerants. In one embodiment, lubricants comprise those commonly known as “mineral oils” in the field of compression refrigeration lubrication. Mineral oils comprise paraffins (i.e., straight-chain and branched-carbon-chain, saturated hydrocarbons), naphthenes (i.e. cyclic paraffins) and aromatics (i.e. unsaturated, cyclic hydrocarbons containing one or more rings characterized by alternating double bonds). In one embodiment, lubricants comprise those commonly known as “synthetic oils” in the field of compression refrigeration lubrication. Synthetic oils comprise alkylaryls (i.e. linear and branched alkyl alkylbenzenes), synthetic paraffins and naphthenes, and poly(alphaolefins). Representative conventional lubricants are the commercially available BVM 100 N (paraffinic mineral oil sold by BVA Oils), napthenic mineral oil commercially available from Crompton Co. under the trademarks Suniso® 3GS and Suniso® 5GS, naphthenic mineral oil commercially available from Pennzoil under the trademark Sontex® 372LT, napthenic mineral oil commercially available from Calumet Lubricants under the trademark Calumet® RO-30, linear alkylbenzenes commercially available from Shrieve Chemicals under the trademarks Zerol® 75, Zerol® 150 and Zerol® 500, and HAB 22 (branched alkylbenzene sold by Nippon Oil).
In another embodiment, lubricants may also comprise those, which have been designed for use with hydrofluorocarbon refrigerants and are miscible with refrigerants of the present invention under compression refrigeration and air-conditioning apparatus' operating conditions. Such lubricants include, but are not limited to, polyol esters (POEs) such as Castrol® 100 (Castrol, United Kingdom), polyalkylene glycols (PAGs) such as RL-488A from Dow (Dow Chemical, Midland, Mich.), polyvinyl ethers (PVEs), and polycarbonates (PCs).
Lubricants used with the compositions disclosed herein are selected by considering a given compressor's requirements and the environment to which the lubricant will be exposed.
In one embodiment, the compositions disclosed herein may further comprise an additive selected from the group consisting of compatibilizers, UV dyes, solubilizing agents, tracers, stabilizers, perfluoropolyethers (PFPE), and functionalized perfluoropolyethers.
In one embodiment, the compositions may be used with about 0.01 weight percent to about 5 weight percent of a stabilizer, free radical scavenger or antioxidant. Such other additives include but are not limited to, nitromethane, hindered phenols, hydroxylamines, thiols, phosphites, or lactones. Single additives or combinations may be used.
In an alternate embodiment, the compound of formula (1) may be dimerized. The compound of formula (1) may be reacted with itself, in the absence of the fluorinated ethylene compound of formula (2), in the presence of a catalyst, such as antimony fluoride (SbF5). In some embodiments, the reaction may be performed in the presence of a solvent. Suitable solvents include those described above.
In an example of the alternate embodiment, a dimer may be formed by reacting 1,3,3,3-tetrafluoro-1-propene, CF3CH═CHF (1234ze), as shown below.
In one embodiment the compositions described above may be used in combination with a chiller apparatus, alternately referred to herein as a chiller. In an embodiment, the chiller may be a vapor compression chiller. Such vapor compression chillers may be either a flooded evaporator chiller, which is shown in
Chillers, including both flooded evaporator and direct expansion chillers, may be coupled with an air handling and distribution system to provide comfort air conditioning (cooling and dehumidifying the air) to large commercial buildings, including hotels, office buildings, hospitals, universities and the like. In another embodiment, chillers, most likely air-cooled direct expansion chillers, have found additional utility in naval submarines and surface vessels.
To illustrate how chillers operate using the inventive compositions, reference is made to the Figures. A water-cooled, flooded evaporator chiller is shown illustrated in
It should be noted that for a single component composition, such as a compound of formula (3), described above, the composition of the vapor refrigerant in the evaporator is the same as the composition of the liquid refrigerant in the evaporator. In this case, evaporation will occur at a constant temperature. However, if a refrigerant blend (or mixture). such as a compound of formula (3) in combination with a co-compound, is used, the liquid refrigerant and the refrigerant vapor in the evaporator (or in the condenser) may have different compositions.
Chillers with cooling capacities above 700 kW generally employ flooded evaporators, where the refrigerant in the evaporator and the condenser surrounds a coil or other conduit for the cooling medium (i.e., the refrigerant is on the shell side). Flooded evaporators require higher charges of refrigerant, but, permit closer approach temperatures and higher efficiencies. Chillers with capacities below 700 kW commonly employ evaporators with refrigerant flowing inside the tubes and cooling medium in the evaporator and the condenser surrounding the tubes, i.e., the cooling medium is on the shell side. Such chillers are called direct-expansion (DX) chillers. A water-cooled direct expansion chiller is illustrated in
In another embodiment, the chiller apparatus may be a high temperature heat pump apparatus having at least two heating stages arranged as a cascade heating system, each stage circulating a working fluid therethrough comprising (a) a first expansion device for reducing the pressure and temperature of a first working fluid liquid; (b) an evaporator in fluid communication with the first expansion device having an inlet and an outlet; (c) a first compressor in fluid communication with the evaporator and having an inlet and an outlet; (d) a cascade heat exchanger system in fluid communication with the first compressor and having: (i) a first inlet and a first outlet, and (ii) a second inlet and a second outlet in thermal communication with the first inlet and outlet; (e) a second compressor in fluid communication with the second outlet of the cascade heat exchanger and having an inlet and an outlet; (f) a condenser in fluid communication with the second compressor and having an inlet and an outlet; and (g) a second expansion device in fluid communication with the condenser; wherein the second working fluids comprises at least one alkyl perfluoroalkene ether. In accordance with the present invention, there is provided a cascade heat pump system having at least two heating loops for circulating a working fluid through each loop. One embodiment of such a cascade system is shown generally at 110 in
Cascade heat pump system 110 includes first expansion device 116. First expansion device 116 has an inlet 116a and an outlet 116b. First expansion device 116 reduces the pressure and temperature of a first working fluid liquid which circulates through the first or low temperature loop 112.
Cascade heat pump system 110 also includes evaporator 118. Evaporator 118 has an inlet 118a and an outlet 118b. The first working fluid liquid from first expansion device 116 enters evaporator 118 through evaporator inlet 118a and is evaporated in evaporator 118 to form a first working fluid vapor. The first working fluid vapor then circulates to evaporator outlet 118b.
Cascade heat pump system 110 also includes first compressor 120. First compressor 120 has an inlet 120a and an outlet 120b. The first working fluid vapor from evaporator 118 circulates to inlet 120a of first compressor 120 and is compressed, thereby increasing the pressure and the temperature of the first working fluid vapor. The compressed first working fluid vapor then circulates to the outlet 120b of the first compressor 120.
Cascade heat pump system 110 also includes cascade heat exchanger system 122. Cascade heat exchanger 122 has a first inlet 122a and a first outlet 122b. The first working fluid vapor from first compressor 120 enters first inlet 122a of heat exchanger 122 and is condensed in heat exchanger 122 to form a first working fluid liquid, thereby rejecting heat. The first working fluid liquid then circulates to first outlet 122b of heat exchanger 122. Heat exchanger 122 also includes a second inlet 122c and a second outlet 122d. A second working fluid liquid circulates from second inlet 122c to second outlet 122d of heat exchanger 122 and is evaporated to form a second working fluid vapor, thereby absorbing the heat rejected by the first working fluid (as it is condensed). The second working fluid vapor then circulates to second outlet 122d of heat exchanger 122. Thus, in the embodiment of
Cascade heat pump system 110 also includes second compressor 124. Second compressor 124 has an inlet 124a and an outlet 124b. The second working fluid vapor from cascade heat exchanger 122 is drawn into compressor 124 through inlet 124a and is compressed, thereby increasing the pressure and temperature of the second working fluid vapor. The second working fluid vapor then circulates to outlet 124b of second compressor 124.
Cascade heat pump system 110 also includes condenser 126 having an inlet 126a and an outlet 126b. The second working fluid from second compressor 124 circulates from inlet 126a and is condensed in condenser 126 to form a second working fluid liquid, thus producing heat. The second working fluid liquid exits condenser 126 through outlet 126b.
Cascade heat pump system 110 also includes second expansion device 128 having an inlet 128a and an outlet 128b. The second working fluid liquid passes through second expansion device 128, which reduces the pressure and temperature of the second working fluid liquid exiting condenser 126. This liquid may be partially vaporized during this expansion. The reduced pressure and temperature second working fluid liquid circulates to second inlet 122c of cascade heat exchanger system 122 from expansion device 128.
As used herein, the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus. Further, unless expressly stated to the contrary, “or” refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
The transitional phrase “consisting of” excludes any element, step, or ingredient not specified. If in the claim such would close the claim to the inclusion of materials other than those recited except for impurities ordinarily associated therewith. When the phrase “consists of” appears in a clause of the body of a claim, rather than immediately following the preamble, it limits only the element set forth in that clause; other elements are not excluded from the claim as a whole.
The transitional phrase “consisting essentially of” is used to define a composition, method that includes materials, steps, features, components, or elements, in addition to those literally disclosed provided that these additional included materials, steps, features, components, or elements do materially affect the basic and novel characteristic(s) of the claimed invention, especially the mode of action to achieve the desired result of any of the processes of the present invention. The term ‘consisting essentially of’ occupies a middle ground between “comprising” and ‘consisting of’.
Where applicants have defined an invention or a portion thereof with an open-ended term such as “comprising,” it should be readily understood that (unless otherwise stated) the description should be interpreted to also include such an invention using the terms “consisting essentially of” or “consisting of.”
Also, use of “a” or “an” are employed to describe elements and components described herein. This is done merely for convenience and to give a general sense of the scope of the invention. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise.
The following Examples are provided to illustrate certain embodiments of the invention and shall not limit the scope of any claims appended hereto.
Exemplary examples of the formation of compounds of formula (3) are shown below:
Reaction of HFO-1234ze with Chlorotrifluoroethylene Catalyzed by SbF5
A 400 ml Hastelloy® shaker tube was loaded with 12 g (0.055 mol) of SbF5, shaker tube was cooled down in dry ice, evacuated and charged with 150 g (1.32 mol) of HFO-1234ze and 150 g (1.29 mol) of chlorotrifluoroethylene (CTFE). It was placed in barricade and was warmed up to ambient temperature and kept agitated for 16 hours. The reaction vessel was cooled down with ice, vented off and liquid product was added to 1 L of water. Organic layer was separated, dried over MgSO4 and filtered to give 290 g of crude material. It was fractionated to give 148 g (50% yield) of fraction b.p. 59-62° C., which was identified as a mixture of CF3CH═CHCF2CF2Cl and CF3CH═CHCFClCF3 in ratio 36:64 (purity of this fraction was 97.8%). This fraction was redistilled to give 120 g of material 99.3% purity, b.p. 60-61° C.
The ratio of CF3CH═CHCF2CF2Cl and CF3CH═CHCFClCF3 in the reaction product mixture can vary. The reaction product ratio can range from about 30:70, about 32:68, about 34:66 and in some cases about 36:64.
Reaction of HFO-1234ze with Chlorotrifluoroethylene Catalyzed by AlCl3
A 400 ml Hastelloy® shaker tube was loaded with 12 g (0.09 mol) of anhydrous pulverized AlCl3, shaker tube was cooled down in dry ice, evacuated and charged with 75 g (0.66 mol) of HFO-1234ze and 75 g (0.64 mol) of chlorotrifluoroethylene (CTFE). Shaker tube was placed in barricade, warmed up to ambient temperature and kept agitated for 16 hours. The reactor was cooled down with ice, vented off and liquid product was added to 1 L of water. Organic layer was separated, dried over MgSO4 and filtered to give 148 g of crude material, which was found to contain 68% of a mixture of CF3CH═CHCF2CF2Cl and CF3CH═CHCFClCF3 (ratio of CF3CH═CHCF2CF2Cl and CF3CH═CHCFClCF3 54:46) along with higher coiling point materials. Calculated yield of C5H2ClF7 fraction was 66%.
If desired, the amount of catalyst can be varied. The reaction product ratio of CF3CH═CHCF2CF2Cl and CF3CH═CHCFClCF3 can range from about 64:36, about 62:38, and in some cases about 60:40.
A 1 L Hastelloy® shaker tube agitated reactor was charged with 11 g (0.05 mol) of SbF5, cooled down with dry ice, leak checked by pressurizing with nitrogen, vented, evacuated and 500 g (4.4 mol) of HFO-1234ze was condensed into the reactor. It was brought to ambient temperature and kept at 25-30° C. for 12 hours. Water (100 ml) was injected into the reactor using a pump. The reactor was vented, opened and the reaction mixture was added to separatory funnel containing 1 L of water, organic layer was separated, dried oven MgSO4, filtered to give 474 g of crude product, which was further flash distilled to yield 400 g of crude product. Fractionation using 36 inch glass column with Hastelloy® packing and gave 350 g (70% yield) of material with b.p. 86-87° C., identified by NMR and GC/MS as E-CF3CH═CHCH(CF3)CF2H, containing 3% of Z-isomer.
Reaction of HFO-153-10ze with chlorotrifluoroethylene catalyzed by AlCl3
A 50 ml flask was loaded with 1.0 g (0.007 mol) of anhydrous pulverized AlCl3 inside of dry box. It was equipped with thermocouple, magnetic stir bar and dry ice condenser connected to nitrogen line. The reactor was cooled down with ice, charged with 11 g (0.042 mol) of HFO-153-10ze (C4F9CH═CHF) and 5 g (0.042 mol) of chlorotrifluoroethylene (CTFE) was introduced into reaction mixture through gas inlet tube over period of 30 minutes. The reaction vessel was slowly warmed up to ambient temperature in water bath and was kept agitated for 4 hours. Crude reaction mixture was diluted with 300 ml of water, organic layer was separated, dried over MgSO4 and filtered to give 15 g of crude material, which was distilled using 10 inch Vigreux column to give 7.9 g (75%) of material boiling at 120-129° C. and containing a mixture of C4F9CH═CHCF2CF2Cl and C4F9CH═CHCFClCF3 (ratio 54:56), along with 3% of higher boiling point material.
E-C4F9CH═CHCF2CF2Cl:
Reaction of HFO-1234ze with Tetrafluoroethylene Catalyzed by AlCl3
A 400 ml Hastelloy® shaker tube was loaded with 5 g (0.038 mol) of anhydrous pulverized AlCl3, shaker tube was cooled down in dry ice, evacuated and charged with 60 g (0.52 mol) of HFO-1234ze and 50 g (0.5 mol) of tetrafluoroethylene (TFE). Shaker tube was placed in barricade and was warmed up to ambient temperature for 2 hours. It was charged with another 50 g (0.5 mol) of TFE and kept agitated for 12 hours. The reactor was cooled down with ice, vented off and liquid product (140 g) was added to 1 L of water. Organic layer was separated, dried over MgSO4 and filtered to give 130 g of crude material, containing 65% of E-CF3CH═CHCF2CF3 (F12E) and 35% E-C2F5CH═CHC3F7(F23E). Fractionation using 10 inch Vigreux column gave 46 g (yield 43%) of identified by GC/MS and NMR as CF3CH═CHCF2CF3 (b.p. 29-30° C.) and 28 g (yield 17%) of material b.p.70-74° C. (main 73-74° C.) identified by NMR and GC/MS as E-C2F5CH═CHC3F7 (purity 98%).
E-CF3CH═CHCF2CF3:
If desired, the E-CF3CH═CHCF2CF3 (F12E) and E-C2F5CH═CHC3F7(F23E) in the reaction product mixture can be varied by varying the amount of reactants. The amount of E-CF3CH═CHCF2CF3 (F12E) and E-C2F5CH═CHC3F7(F23E) in the reaction product can vary from 1 to 100 wt %, about 25 to 75 wt. % and in some cases about 50 to 50 wt. %.
Reaction of HFO-1234ze with Vinylidene Fluoride Catalyzed by AlCl3
This reaction was carried out in similar fashion in 400 ml Hastelloy® shaker tube, using with 5 g (0.038 mol) of anhydrous pulverized AlCl3, 60 g (0.52 mol) of HFO-1234ze and 32 g (0.5 mol) of vinylidene fluoride (VF2) added to cold reaction vessel in one portion. The reaction mixture was worked up as it was described above. Crude product (89 g) was distilled to give 21 g (yield 24%) of fraction with boiling point 63-68° C., identified as a mixture of E-CF3CH═CHCH2CF3 and Z-CF3CH═CHCH2CF3 (ratio 92:8) by GC/MS and NMR, along with 60 g of higher boiling point material, which was not characterized.
E-CF3CH═CHCH2CF3:
The ratio of E-CF3CH═CHCH2CF3 and Z-CF3CH═CHCH2CF3 in the product mixture can range from about 1 to 100 wt %, about 25 to 75 wt. % and in some cases about 50 to 50 wt %. The ratio can be varied by changing at least one of the ratio of reactants, an optional solvent and temperature.
A reaction of 5 g (0.038 mol) of anhydrous, pulverized AlCl3, 115 g (1 mol) of HFO-1234yf (CF3CF═CH2, isomer of HFO-1234ze) and 50 g of TFE was carried out as described above in 400 ml Hastelloy® shaker tube at ambient temperature. No pressure drop was observed over a 16-hour period and no liquid product was recovered after shaker tube was vent off.
The efficiency and capacity of binary fluid blends over the entire composition range were determined.
The heating coefficient of performance (COPh) and volumetric heating capacity (CAPh) for certain inventive compositions were determined by using mass and energy balances that specify the system and unit operations shown in
The binary compositions exhibited maximum COPh values at 51 wt-% E-F23E. This maximum efficiency for both inventive blends at about 51 wt-% E-F23E were compared to neat fluids E-F23E, E-F12E, R-1336mzzZ, R-1233zdE, and R245fa. As shown in Table 2, both inventive blends, E-F23E/E-F12E and E-F23E/R-1336mzzZ, both at about 51 wt-% E-F23E, have the largest COPh values, with E-F23E/E-F12E at 51 wt-% E-F23E having the largest COPh value.
While the invention has been described with reference to one or more embodiments, it will be understood by those skilled in the art that various changes may be made, and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. In addition, all numerical values identified in the detailed description shall be interpreted as though the precise and approximate values are both expressly identified.
This Application claims the benefit of U.S. Application No. 62/835,703, filed Apr. 18, 2019. The disclosure of Application No. 62/835,703 is hereby incorporated by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2020/028675 | 4/17/2020 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 62835703 | Apr 2019 | US |
