Deicing solution

Abstract

A de-icing and anti-icing composition in the form of an aqueous solution which includes molasses, and an inorganic freezing point depressant in the form of a chloride salt.

Description

BACKGROUND OF THE INVENTION

[0002] The current state of the art for coping with snow and ice on roads usually involves applying a deicer material such as a salt to the road surface. Sometimes antiskid materials such as sand or other aggregates such as gravel are added with or without a salt.

[0003] The use of salt and compositions having high concentrations of salt, cause an undesirable corrosive effect on vehicles, the road surface, and the environment with respect to the run off of water containing salt which contaminates the surrounding land and water.

[0004] Considering the above problems associated with salt formulations, there has been a continuing need for a deicing composition or formulation which can effectively melt snow and ice yet which reduces the corrosion and environmental contamination referred to above. In response to the above problems associated with the use of road salt, the prior art has looked to alternative formulations which are less corrosive and more environmentally friendly.

[0005] U.S. Pat. No. 5,635,101 (Janke et al.) relates to a deicing composition containing a by-product of a wet milling process of shelled corn. Corn kernels are steeped or soaked in a hot solution containing small amounts of sulfurous acid. The corn kernels are separated from the steep water and steep water solubles are used in the production of a deicing composition.

[0006] U.S. Pat. No. 4,676,918 (Toth et al.) relates to a deicing composition which comprises a mixture containing at least one component selected from a number of chlorides or urea and an admixture of waste concentrate of alcohol distilling that has a dry substance content of from 200 to 750 g/kg and from 10% to 80% by weight of water.

[0007] U.S. Pat. No. 6,080,330 (Bloomer) teaches a composition for use in preventing the formation of ice or snow on outdoor surfaces, such as roadways or aggregate stockpiles, and also for deicing surfaces upon which snow or ice has formed. The composition is formed from a waste product of the process of removing sugar from sugar beet molasses, also known as desugared sugar beet molasses.

[0008] The Janke et al., Toth et al. and Bloomer materials are naturally occurring substances with hundreds (if not thousands) of components such as complex carbohydrates, starches, sugars, proteins etc. and are normally used with a salt.

[0009] The above de-icing solutions now being introduced in the field employ agricultural residues e.g., corn based distillers solubles and solubles from the corn wet milling industries. These naturally occurring substances, which also include brewers condensed solubles, are extremely variable in composition, viscosity, film forming tendency, freezing temperature, pH etc., and consequently give varying performance when used in de-icing solutions. Depending upon the source and batch, these materials at low temperatures sometimes exhibit such resistance to flow that they cannot be applied evenly to a road surface or mixed with a chloride, rendering them virtually unsuitable for use.

[0010] Furthermore, these patents utilize materials which have highly undesirable or unnecessary ingredients leading to practical difficulties by manufacturers and users, such as stratification in storage, biological degradation, odor, plugging of filters and spray nozzles and environmental difficulties e.g. high biological oxygen demand due to the very high organic contents (about 40% by weight), presence of phosphorus compounds and heavy metals.

[0011] To improve quality and performance, and to meet current mandated standards, there is an immediate need for synthetic, chemically modified thickeners, and carefully purified materials which can be substituted for the currently used agricultural residues. Such a formulation would improve performance and reduce metal corrosion, spalling of concrete, toxicity and addresses environmental concerns.

[0012] It is therefore an object of the present invention to provide a deicing formulation which exhibits improved performance standards which overcomes the prior art problems described above.

[0013] It is a further object of the present invention to provide a deicing formulation which utilizes a synergistic combination of a low molecular weight carbohydrate and an inorganic freezing point depressant.

[0014] It is another object of the present invention to provide a deicing formulation which utilizes a low molecular weight carbohydrate to provide for improved ice melting properties and exhibits less corrosion.

[0015] It is a further object of the present invention to provide a deicing formulation which provides consistent physical and chemical properties, thereby assuring consistent quality and performance.

[0016] It is another object of the present invention to provide an economical, highly effective deicing formulation.

SUMMARY OF THE INVENTION

[0017] The present invention is based upon the discovery that low molecular weight (about 180 to 1,000) carbohydrates when used with an inorganic freezing point depressant such as a chloride salt has a synergistic effect upon freezing point depression. The formulation of deicing/anti-icing compositions employs carbohydrates of less than about 1,000 molecular weight, such as glucose/fructose, disaccharides, trisaccharides, tetrasaccharides, pentasaccharides, hexasaccharides, and mixtures thereof. The broader operative range for the carbohydrate molecular weight is from about 180 to 1,500, with the range of about 180 to 1,000 being preferred.

[0018] The basic composition of the present invention consists of at least the first two of the following three components in aqueous solution depending upon ambient weather conditions, terrain, nature and amount of freezing/snow precipitation, and environmental concerns:

[0019] (1) Inorganic freezing point depressants preferably in the form of chloride salts which include magnesium chloride, calcium chloride and sodium chloride. Metal acetates e.g. calcium magnesium acetate, and other suitable acetates may also be used.

[0020] (2) Low molecular weight carbohydrates in the 180 to 1,500 range (180-1,000 preferred). These carbohydrates can be obtained from a wide range of agricultural based products such as those derived from corn, wheat, barley, oats, sugar cane, sugar beets etc.

[0021] (3) Thickeners are used in certain applications as the third key component to increase the viscosity of the composition so that the liquid remains in contact with the road surface or with the solid particles in piles of rocksalt/sand, or rocksalt/aggregates, or salt alone, or sand or aggregate. Thickeners are mainly cellulose derivatives or high molecular weight carbohydrates. Typical molecular weights for cellulose derivatives are for methyl and hydroxy propyl methyl celluloses from about 60,000 to 120,000 and for hydroxy ethyl celluloses from about 750,000 to 1,000,000. Carbohydrate molecular weights range from about 10,000 to 50,000.

[0022] These components are used in an aqueous solution in the following concentrations:

                                 Weight %
Carbohydrate                     3 to 60
Inorganic FreezingPoint Depressant 5 to 35
Thickener                        0.15 to 10

[0023] In a further embodiment of the present invention it has been found that molasses functions as a highly effective carbohydrate in the above formulation.

[0024] The above described compositions provide a de-icing and anti-icing formulation which can be formulated more uniformly to provide for more consistent properties from batch to batch, while at the same time providing for increased ice melting properties.

DETAILED DESCRIPTION OF THE INVENTION

[0025] In the development of the present invention it was determined that the predominant organic constituents in the prior art formulations described above were carbohydrates, and in one series of tests, Brewers Condensed Solubles (BCS), which was selected as a test sample, was diluted with water and separated into several fractions by the addition of increasing amounts of an ethanol/methanol 85/15 v/v mix. The characteristic of the various fractions and their freezing points when mixed with 15% magnesium chloride are tabulated below.

	TABLE 1
	% ethanol/
	methanol	%	% Carbo-	Freezing Point
Sample	added	Solids	hydrates	° F.	° C.
Brewers (BCS)	NIL	43.6	43.1	−31.9	−35.5
Fraction A Precipitate	60	5.3	3.8	−10.1	−23.4
Fraction B Precipitate	74	3.7	3.2	−10.8	−23.8
Fraction C Precipitate	82	2.8	2.1	−10.3	−23.5
Fraction D Precipitate	85	1.3	0.6	−9.9	−23.3
Fraction E Solubles	85	30.7	29.8	−22.7	−30.4

[0026] Fraction A consisted of essentially insoluble, high molecular weight polysaccharides, whereas Fractions B to D inclusive gave gummy residues of polysaccharides. Fractions A to D had little effect upon freezing point depression. Fraction E, the largest component, had a considerable effect upon freezing point and is a mixture of lower molecular weight polysaccharides.

[0027] Fraction E was also examined for ice melting characteristics at 25° F. (−4° C.) in admixture with magnesium chloride employing SHRP H-205.2 Test Method for Ice Melting of Liquid Deicing Chemicals.

TABLE 2
                                Lbs weight
                                ice melted per lb weight of
Deicing Solution                inorganic salt
15% magnesium chloride, control 16.9
Brewers BCS/MgCl2               18.2
Fraction E/MgCl2                19.3
32% calcium chloride            7.3
26.3% sodium chloride           7.5

[0028] The last two figures were calculated from data in SHRP H-205.2. These results indicate the appreciable improvement over the commonly used sodium and calcium chlorides in ice melting characteristics when Fraction E and Brewers BCS are mixed with magnesium chloride. There is also a 14% improvement over the control when Fraction E is used. This, together with freezing point depression improvement indicates that an appreciably improved deicing solution can be formulated.

[0029] The next stage of the investigation consisted of attempting to isolate and define the active components in the Brewers BCS. This was done by first filtering employing a 0.45 micron membrane followed by ultrafiltration using a Model UFP-1-E-s (A/G Technology Corporation, Needham, Mass.) with a nominal cutoff at a molecular weight of 1000 and finally gel permeation chromatography (GPC) using a Waters LC Module 1 unit with a set of three ultrahydrogel columns and 50 mm Na2 HPO4 solution at pH7 as the mobile phase. The brewers BCS liquor had two major carbohydrate fractions (a) a low molecular weight fraction with the majority of components having a molecular weight of less than 1000, and (b) a high molecular weight fraction containing compounds with a molecular weight of 12,600 but with some components in the 1000 to 10,000 molecular weight range. Fraction E was found to have a chromatographic profile very similar to the low molecular weight fraction (a) above with a molecular weight of less than 1000. Cane Sugar DCS liquor had more components than the Brewers BCS but had similar high and low molecular weight fractions with similar molecular weight distributions.

[0030] In order to confirm that the low molecular weight fraction has the greatest effect upon freezing point depression, a further series of freezing points were measured using in this instance, Dead Sea Salt Solution from Jordan in lieu of laboratory grade magnesium chloride. Again the concentration of magnesium chloride was 15% by weight for all samples.

	TABLE 3
	Freezing Point
	Sample	° F.	° C.
	Control: Industrial grade magnesium	−0.4	−18.0
	chloride solution/Water
	Brewers(BCS)	−31.9	−35.5
	Brewers GPC High Mol Wt Fraction	−5.1	−20.6
	Brewers GPC Low Mol Wt Fraction	−16.4	−26.9
	Brewers BCS Fraction E	−13.4	−25.2

[0031] It was thus shown that low molecular weight (less than 1000) carbohydrates had the greatest effect upon freezing point depression. Based upon these experiments, it was concluded that the formulation of deicing/anti-icing compositions should employ compounds in the less than 1000 molecular weight range such as those tabulated below in Table 4:

TABLE 4
Carbohydrate     Molecular Weight
Glucose/fructose 180
Disaccharides    342
Trisaccharides   504
Tetrasaccharides 666
Pentasaccharides 828
Hexasaccharides  990

[0032] There is available commercially a wide range of carbohydrates with varying carbohydrate compositions. An evaluation was conducted using simple sugars, disaccharides and polysaccharides in an attempt to determine the effect of molecular weight and solute concentration upon freezing point. The concentration of magnesium chloride used in the test was 15% by weight. The test results for simple carbohydrates and complex carbohydrates are tabulated below in Tables 5 and 6 respectively.

TABLE 5
SIMPLE CARBOHYDRATES
Carbohydrate	% Concentration of	Freezing Point
Type	Name	Carbohydrate	° F.	° C.
Control	MgCl2 (15%)	Nil	−4.7	−20.4
Sugar	Fructose	25.0	−8.9	−22.7
Sugar	Fructose	50.0	−18.2	−27.9
Sugar	Fructose	75.0	−31.9	−35.5
Sugar	Glucose	30.0	−11.4	−24.1
Sugar	Glucose	65.0	−37.3	−38.5
Disaccharide	Maltose	25.0	−8.3	−22.4
Disaccharide	Lactose	25.0	−11.7	−24.3

[0033]

TABLE 6
COMPLEX CARBOHYDRATES
		Freezing
	% Concentration of	point
Carbohydrate	Carbohydrate	° F.	° C.	Comments
Control MgCl2	Nil	−4.7	−20.4
(15%)
Corn syrup-high	30	−5.6	−20.9	Contains glucose,
maltose				maltose and
				maltotrisoe
Corn syrup-high	65	−19.1	−28.4
maltose
Corn syrup solids	25.0	−9.9	−23.3	Average Mol. Wt.
DE20				3746
Corn syrup solids	25.0	−11.6	−24.2	Average Mol. Wt.
DE44				1120
Corn syrup solids	50.0	−21.3	−29.6
DE44
Corn syrup solids	65.0	−27.0	−32.8
DE44

[0034] It can be seen from the results above that glucose is better than fructose and of the two dissaccharides lactose is somewhat better than maltose. The corn syrup DE20 has about 47% of mono to hexasaccharides and the DE44 grade has about 69%, and the latter grade is slightly better in reducing freezing point. Also Table 6 shows that there is a relationship between carbohydrate concentration and freezing point thus allowing various formulations to be developed.

[0035] More complex carbohydrates were also evaluated such as dextrins and maltodextrins which are derived by hydrolysis (enzymatic or via dilute mineral acids) of corn starch. In addition a series of thickeners were evaluated. The control magnesium chloride solution was prepared from the hexahydrate in Table 7 below which shows the results obtained. Again all samples contained 15% by weight of magnesium chloride.

	TABLE 7
	Freezing Point
Compound	% Concentration	° F.	° C.	Comment
Control 15% MgCl2	Nil	+3.4	−15.9
Dextrin	5.0	−4.7	−20.4
Maltodextrin DE5	5.0	−4.7	−20.4
Maltodextrin DE15	9.1	−17.1	−27.3	Lower Mol. Wt
				than
				DE 5
Hydroxyethyl	0.33	+1.2	−17.1	Thickener
cellulose 250 HHR
Carboxymethyl	1.0	+2.5	−16.4	Thickener
cellulose
Gum arabic	3.6	−1.8	−18.8	Thickener
Gum tragacanth 470	0.2	−3.3	−19.6	Thickener

[0036] The Maltodextrin DE15 exhibits good results due to the lower molecular weight components present and the higher concentration. The higher the molecular weight, the less the influence upon freezing point. Some thickeners were unstable in the presence of magnesium chloride e.g. carboxy methyl cellulose, and so lose their efficacy as thickeners.

[0037] It is also important to define the chloride salt content for deicing/anti-icing liquids, the higher the chloride salt content, the lower the freezing point and the higher the ice melting characteristics. These characteristics are shown by the data in Table 8 below for Mg Cl2 and Ca Cl2 at varying salt and carbohydrate concentrations.

TABLE 8
Chloride	% salt by	% Carbohydrate	Freezing Point
Salt	weight	by weight	° F.	° C.
MgCl2	22.7	18.0	Less than −47	Less than
				−43.9
MgCl2	15.0	25.5	−22	−30
CaCl2	29.6	18.6	Less than −47	Less than
				−43.9
CaCl2	17.5	4.1	−5.4	−20.8
CaCl2	15.0	4.1	−0.6	−18.1

[0038] As the concentrations of salts and carbohydrates increase the freezing point of the mixtures decrease. In the case of calcium chloride at a fixed carbohydrate concentration of 4.1% an increase of 2.5% by weight of Ca Cl2 decreased the freezing point by 4.8° F. (2.67° C.). Again formulations can be varied to suit local conditions. Care must be taken as salt concentrations approach the eutectic point on the freezing point—concentration curve where the freezing point can rise and the salt can crystallize out.

[0039] From the above discussion and laboratory evaluations the basic composition consists of at least the first two of the following components in aqueous solution depending upon ambient weather conditions, terrain, nature and amount of freezing/snow precipitation, environmental concerns, etc:

[0040] (1) An inorganic freezing point depressant in the form of inorganic electrolytes, mainly chlorides, but also others, such as sulfates and acetates, and could be used in concentrations of about 5 to 35 wt %. The main types employed are magnesium chloride, calcium chloride and sodium chloride.

[0041] (2) A carbohydrate, especially lower molecular weight carbohydrates in a range of about 180 to 1500. A preferred range is about 180 to 1,000. The carbohydrates can be obtained primarily from a wide range of agricultural based products such as those derived from corn, wheat, barley, oats, sugar cane, sugar beet, etc.

[0042] (3) Thickeners which are used in a concentration of about 0.15 to 10 wt % to increase the viscosity of the compositions so that the liquid remains in contact with the road surface or with the solid particles in piles of rock salt/sand, or rock salt/aggregates, or rock salt alone, or sand or aggregate. Thickeners are mainly cellulose derivatives such as methyl cellulose, hydroxy ethyl cellulose, hydroxy propyl methyl cellulose, hydroxy propyl cellulose, etc. or high molecular weight carbohydrates.

[0043] The corrosivity of deicing/anti-icing liquids is important due to the effect upon automobiles, other road transport vehicles, bridges, reinforcing rods (rebars) in concrete structures such as bridge decks, ramps and parking garage decks.

[0044] The testing of liquids for corrosivity can be quite complex and there are a number of tests developed by organizations such as ASTM and the National Association of Corrosion Engineers (NACE). The test conditions and metals must approximate those experienced in practice such as aerobic conditions and cold rolled steel specimens. Prior art tests using nails immersed in liquid contained in a screw top bottle are not meaningful mainly because of the anaerobic conditions and the variation in metal substrate composition, the degree of cold working and cleanliness.

[0045] Satisfactory test methods include SHRP H205.7 Test Method for Evaluation of Corrosive Effects of Deicing Chemicals or Metals (Handbook of Test Methods for Evaluating Chemical deicers SHRP-H332, Strategic Highway Research Program, National Research Council, Washington, D.C.) And the test described in the Deicer Specifications for the Pacific Northwest States of Idaho, Montana, Oregon, Washington. The latter is based upon the NACE Standard test Method for the Laboratory Corrosion Testing of Metals. TMO 169-95.

[0046] Some corrosion rate results employing SHRP H205.7 showing corrosion inhibition due to carbohydrate presence are tabulated below in Table 9.

	TABLE 9
	Corrosion Rate (mils per year)
				Six
% Chloride Salt	% Carbohydrate	One Week	Three weeks	weeks
15% Na Cl	Nil	5.97	4.66	5.48
15% MgCl2	Nil	2.58	1.93	1.73
15% MgCl2	4.1	0.89	0.61	0.40

[0047] As can be seen from the data in Table 9, the carbohydrate magnesium chloride formulation reduces the corrosion rate of steel by 92.7% as compared to sodium chloride alone and 76.9% as compared to magnesium chloride alone. Formulations as shown in Examples III and IV (q.v.) were tested for corrosivity employing the Pacific Northwest States protocol and there was a reduction in the corrosion rate compared to sodium chloride solution of 57.2% for Example III and 40.4% for Example IV. This again shows corrosion inhibition properties.

[0048] The following examples are exemplary of various specific embodiments of the present invention which are useful as deicing agents:

EXAMPLE I

[0049]

Component                        Part by Weight
Corn Syrup Solid DE 44           22.5
Industrial grade magnesiumchloride 50.0
solution*
2% Methocel Solution             2.0
Colorant (Caramel YT25)          0.5
Water                            25.0
Freezing Point (ASTM-D 1177-94)  −12.5° F./−24.7° C.
Viscosity at 77°:                20 centipoise
Appearance:                      Gold color, clear
                                 solution
Odor:                            Mild, pleasant.

[0050] *Note: Industrial grade magnesium chloride solution is a commercially available magnesium chloride solution also containing calcium chloride, sodium chloride, potassium chloride.

EXAMPLE II

[0051]

Component                        Parts by Weight
High maltose corn syrup          31.5
Industrial grade magnesiumchloride 50.0
solution
Colorant (Caramel YT25)          0.5
Water                            18.0
Freezing Point (ASTM-D 1177-94): −22° F./−30° C.
Viscosity at 77° F.              14.4 centipoises
Appearance                       Gold color, clear
                                 solution
Odor                             Mild, pleasant.

EXAMPLE III

[0052]

Components                       Parts by Weight
High Maltose Corn Syrup          22.2
Industrial grade magnesiumchloride 70.0
solution
Water                            7.8
Freezing point (ASTM-D 1177-94)  Less than −47° F./−43.9° C.
Appearance                       Clear, light brown,
                                 mobile liquid
Odor                             Mild, pleasant
Specific gravity                 1.27
Viscosity at −94° F./−70° C.     Heavy syrup, flows.

EXAMPLE IV

[0053]

Component                       Parts by Weight
High Maltose Corn Syrup         20.5
43% CaCl2                       72.3
Water                           7.2
Freezing Point (ASTM-D 1177-94) Less than −47° F./−43.9° C.
Appearance                      Clear, colorless, mobile
                                liquid
Odor                            Mild, pleasant
Specific Gravity                1.33
Viscosity at −47° F./−43.9° C.  Very heavy syrup.

EXAMPLE V

[0054]

Component                       Parts by Weight
High Fructose Corn Syrup        19.55
43% Calcium Chloride Solution   73.15
Water                           7.30
Freezing Point (ASTM-D 1177-94) −31° F./−35° C.
Appearance                      Clear, colorless, mobile
                                liquid
Specific Gravity                1.38
Odor                            Mild, pleasant.

EXAMPLE VI

[0055]

Component                        Parts by Weight
Glucose                          32.5
Industrial grade magnesiumchloride 50.0
solution
2% Methoeel Solution             2.0
Colorant (Caramel YT25)          0.5
Water                            15.0
Freezing Point (ASTM-D 1177-94)  −38.2° F./−39.0° C.
Appearance                       Gold color, clear
                                 solution
Odor                             Mild, pleasant.

[0056] Colorants may also be used to enable applicators to see where the deicer has been deposited. Non-toxic colorants which may be used include caramel solutions and food grade dyes.

[0057] In a further embodiment of the present invention it has been found that molasses constitutes a preferred carbohydrate for use in deicing formulations of the present invention. Any suitable molasses may be used. Molasses may be defined as the thick liquid left after sucrose has been removed from the mother liquid in sugar manufacturing. Typically the molasses is obtained from the processing of sugar cane or sugar beets. In addition, there are two other types of molasses which are also suitable-citrus molasses and corn sugar molasses.

[0058] The table below shows the effect of molasses on the freezing point as compared to using MgCl2 alone.

TABLE 10
	% ConcN of	% ConcN of	Freezing Point
Molasses	Molasses (Wt)	MgCl2	° C.	° F.
Black Strap No. 677	15.0	15.0	−22.3	−8.1
Black Strap No. 677	32.5	15.0	−30.5	−22.9
Light Brown No. 732	12.5	15.0	−23.2	−9.8
Light Brown No. 732	18.8	15.0	−24.9	−12.8
Reference	Nil	15.0	−15.9	+3.4

[0059] Note that for substantially the same concentration of MgCl2 that the formulation using molasses exhibited a lower freezing point than MgCl2 alone.

[0060] The grade of molasses listed in the Table is Molasses No 677 available from International Molasses Corporation Ltd., of New Jersey and has the following analysis:

Fructos	7 to 11%	by weight
Glucose	7 to 11%	by weight
Sucrose	30 to 36%	by weight
Total sugars	45 to 52%	by weight
Ash i.e. inorganic (phosphates, Ca, K, Mg, Na)	11.5%	maximum
Cellulosics, high mol wt. compounds	16 to 23%	by weight
Total Solids	79 to 80%
Water	20 to 21%

[0061] Sugar Beet Molasses contains primarily sucrose, very little glucose and fructose plus a trisacchaside called saffinose. A typical analysis is:

Fructose     0.01% by weight
Glucose      0.01% by weight
Sucrose      45 to 50% by weight
Raffluose    1.5 to 2.5% by weight
Total sugar  46.5 to 52.5%
Ash          9.3 to 22.8%
Total Solids 75 to 80%
Water        20 to 25%
pH           7.5 to 8.6

[0062] Weight Average Molecular Weight of saccharides 347 to 350. Desugared molasses from sugar beet will typically have 17.5 to 20% sucrose and 5.3 to 6.0 saffinose.

[0063] Citrus Molasses is produced from citrus waste and has the following typoical analysis:

	Total sugars	42.4%	by weight
	Protein	4.7%	by weight
	Ash content	4.8%	by weight
	Total Solids	71.4%	by weight

[0064] The sugars are primarily glucose, fructose and sucrose.

[0065] Corn sugar molasses is stated to be the mother liquid remaining after dextrose crystallization and has the following typical analysis:

	Total Sugars	50.3%	by weight
	Protien	0.4%	by weight
	Ash content	3.9%	by weight
	Total solids	74.9%	by weight

[0066] Again the sugars are primarily glucose, fructose and sucrose.

[0067] The main saccharides which contribute the most of the deicing/anti-icing characteristics are glucose fructose and sucrose fractions, with molecular weights of 180, 180 and 342 respectively, and typically total concentrations in the molasses of 45 to 52% by wight. The weight average molecular weight for the glucose, fructose and sucrose components in this grade of molasses is between 270 and 295 depending upon the saccharide mixture composition.

[0068] The following examples will illustrate the use of various grades as well as the range of concentrations of molasses in combination with a chloride salt.

EXAMPLE VII

[0069]

Component                       Parts by Weight
Molasses, light brown, No. 732  12.5
30% magnesium chloride solution 50.0
Water                           37.5
Freezing Point (ASTM-D 1177-94) −23.2° C./−9.8° F.
Appearance                      Light golden brown,
                                clear solution
pH                              5.5
Density                         1.171 grams per ml.
Odor                            Pleasant.

EXAMPLE VIII

[0070]

Component                        Parts by Weight
Molasses, light brown, No. 732   18.8
30% magnesium chloride solution  50.0
Water                            31.2
Freezing Point (ASTM- D 1177-94) −24.9° C./−12.8° F.
Appearance                       Light golden brown,
                                 clear solution
pH                               5.5
Density                          1.196 grams per ml.
Odor                             Pleasant.

EXAMPLE IX

[0071]

Component                       Parts by Weight
Black Strap Molasses No. 677    15.0
Industrial grade magnesium      50.0
Chloride solution
Caramel YT25 Colorant           0.5
2% Methocel E Solution          12.5
Water                           22.0
Freezing Point (ASTM-D 1177-94) −22.3° C./−8.1° F.
Appearance                      Dark brown solution
pH                              5.5
Odor                            Distinctive, pleasant.

EXAMPLE X

[0072]

Component                        Parts by Weight
Black Strap Molasses No. 677     32.5
Industrial grade magnesium       50.0
Chloride solution
Caramel YT25 Colorant            0.5
2% Methocel E Solution           12.5
Water                            4.5
Freezing Point (ASTM- D 1177-94) −30.5° C./−22.9° F.
Appearance                       Almost black color
pH                               5.0 to 5.5
Odor                             Distinctive, pleasant.

[0073] While the present invention has been particularly shown and described herein with reference to various preferred modes it will be understood by one skilled in the art that various changes in detail may be effected therein without departing from the spirit and scope of the invention as defined by the claims.

Claims

1. A method of forming a de-icing and anti-icing composition which comprises: (a) providing an aqueous solution which contains molasses and a chloride salt, and (b) applying said aqueous solution to a source of particulate material selected from the group consisting of salt, sand and aggregates and mixtures thereof.

2. The method of claim I in which the molasses and chloride in said aqueous solution are present in the following concentration:

3. The method of claim 2 in which the chloride salt is at least one selected from the group consisting of sodium chloride, magnesium chloride and calcium chloride.

4. The method of claim 2 in which the weight average molecular weight of the molasses is in the range of about 260 to 295.

5. The method of claim 2 in which the aqueous solution has a viscosity of about 0.1 to 3 poises at 25° C.

6. The method of claim 2 in which the molasses is at least one selected from the group consisting of cane sugar molasses, sugar beet molasses, citrus molasses, and corn sugar molasses.

7. The method of claim 1 in which the aqueous solution has the following composition:

8. Applying the coated particulate composition of claim 1 to an outdoor surface.

9. A method of forming a de-icing and anti-icing composition which comprises: (a) providing an aqueous solution which contains 3 to 60 wt % molasses and 5-35 wt % chloride salt, and (b) applying said aqueous solution to a source of particulate material selected from the group consisting of rock salt, sand and aggregates and mixtures thereof whereby said aqueous solution forms a coating on said particulates.

10. The method of claim 9 in which the chloride salt is at least one selected from the group consisting of sodium chloride, magnesium chloride and calcium chloride.

11. The method of claim 9 in which the weight average molecular weight of the molasses is in the range of about 260 to 295.

12. The method of claim 9 in which the aqueous solution has a viscosity of about 0.1 to 3 poises at 25° C.

13. The method of claim 9 in which the molasses is at least one selected from the group consisting of cane sugar molasses, sugar beet molasses, citrus molasses, and corn sugar molasses.

14. Applying the coated particulate composition of claim 1 to an outdoor surface.