Claims
- 1. A method of separating alkenes or alkynes from a hydrocarbon mixture by use of differential binding rates or equilibrium constants of said alkenes or alkynes to a molybdenum-sulfide dimer comprised of the formula: ##STR30## wherein Cp is selected from the group consisting of: --C.sub.5 H.sub.5, --C.sub.5 H.sub.4 CH.sub.3, --C.sub.5 H.sub.4 CO.sub.2 CH.sub.3, --CH.sub.5 H.sub.4 CO.sub.2 Na, --C.sub.5 H.sub.4 CH.dbd.CH.sub.2, --C.sub.5 (CH.sub.3).sub.5, or C.sub.5 H.sub.4 CHO, R is selected from the group consisting of --C.sub.2 H.sub.4 or --CHR', wherein R' is selected from the group consisting of H, --CO.sub.2 Na, --CO.sub.2 CH.sub.3, --C(CH.sub.3).sub.2 CO.sub.2 Et, --C(CH.sub.3).sub.2 CO.sub.2 Li or --CH(CO.sub.2 CH.sub.3).sub.2, and R" is selected from the group consisting of --C(CH.sub.3).sub.3, --CH(CH.sub.3)CO.sub.2 H, or nothing, such method comprised of the steps:
- preparing said molybdenum sulfide-dimer;
- contacting said hydrocarbon mixture with said molybdenum-sulfide dimer, wherein alkenes or alkynes having an increased affinity to the molybdenum-sulfide dimer relative to the hydrocarbon mixture may be separated from the remainder of the hydrocarbon mixture;
- separating the increased affinity alkenes or alkynes from the remainder of the hydrocarbon mixture.
- 2. The method of claim 1 wherein said hydrocarbon mixture comprises a plurality of alkenes.
- 3. The method of claim 1 wherein said hydrocarbon mixture comprises isomeric alkenes of the same molecular formula.
- 4. The method of claim 1 wherein said hydrocarbon mixture comprises a plurality of alkenes and a plurality of alkanes.
- 5. The method of claim 1 wherein said hydrocarbon mixture comprises a plurality of alkynes and a plurality of alkanes.
- 6. The method of claim 1 wherein said hydrocarbon mixture comprises a plurality of alkynes and a plurality of alkenes.
- 7. The method of claim 1 wherein said hydrocarbon mixture contains alkynes.
- 8. The method of claim 1 wherein said hydrocarbon mixture contains H.sub.2 S.
- 9. The method of claim 1 wherein said molybdenum-sulfide dimer is attached to a permselective membrane.
- 10. The method of claim 9 wherein said membrane is an ion-exchange membrane.
- 11. The method of claim 9 wherein said molybdenum-sulfide dimer is covalently incorporated into the polymeric matrix of said membrane.
- 12. The method of claim 1 wherein said molybdenum-sulfide dimer is on the surface of a solid support.
- 13. The method of claim 1 wherein said molybdenum-sulfide dimer is in an aqueous solution.
- 14. The method of claim 13 wherein said molybenum-sulfide dimer is water soluble.
- 15. A method for removing alkynes from a gaseous hydrocarbon feed stream by use of differential binding rates or equilibrium constants of such compounds to a molybdenum-sulfide dimer comprised of the formula: ##STR31## wherein Cp is selected from the group consisting of: --C.sub.5 H.sub.5, --C.sub.5 H.sub.4 CH.sub.3, --C.sub.5 H.sub.4 CO.sub.2 CH.sub.3, --C.sub.5 H.sub.4 CO.sub.2 Na, --C.sub.5 H.sub.4 CH.dbd.CH.sub.2, --C.sub.5 (CH.sub.3).sub.5, or --C.sub.5 H.sub.4 CHO, R is selected from the group consisting of --C.sub.2 H.sub.4 or --CHR', wherein R' is selected from the group consisting of H, --CO.sub.2 Na, --CO.sub.2 CH.sub.3, --C(CH.sub.3).sub.2 CO.sub.2 Et, --C(CH.sub.3).sub.2 CO.sub.2 Li or --CH(CO.sub.2 CH.sub.3).sub.2, and R" is selected from the group consisting of --C(CH.sub.3).sub.3, --CH(CH.sub.3)CO.sub.2 H, or nothing such method comprised of the steps:
- preparing said molybdenum sulfide-dimer;
- contacting said hydrocarbon feed stream with said molybdenum-sulfide dimer, wherein alkynes having an increased affinity to the molybdenum-sulfide dimer relative to the hydrocarbon feed stream may be separated from the remainder of the hydrocarbon feed stream;
- separating the increased affinity alkynes from the remainder of the hydrocarbon feed stream.
- 16. The method of claim 15 further comprised of the step: heating said increased affinity alkynes of said molybdenum-sulfide dimer in the presence of hydrogen to release the alkyne and the molybdenum sulfide dimer.
Parent Case Info
This is a divisional of application Ser. No. 07/750,045, filed on Aug. 27, 1991, now U.S. Pat. No. 5,391,791.
Non-Patent Literature Citations (1)
Entry |
McKenna et al., Synthesis of Inequivalently Bridged Cyclopentadienyl Dimers of Molybdenum and a Comparison of Their Reactivities with Unsaturated Molecules and with Hydrogen, 105 J. Am. Chem. Soc'y 5329-5337 (1983). |
Divisions (1)
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Number |
Date |
Country |
Parent |
750045 |
Aug 1991 |
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