Solubility methyl ethyl ketone

The methyl ethyl ketazine forms an immiscible upper organic layer easily removed by decantation. The lower, aqueous phase, containing acetamide and sodium phosphate, is concentrated to remove water formed in the reaction and is then recycled to the reactor after a purge of water-soluble impurities. Organic by-products are separated from the ketazine layer by distillation. The purified ketazine is then hydrolyzed under pressure (0.2—1.5 MPa (2—15 atm)) to give aqueous hydrazine and methyl ethyl ketone overhead, which is recycled (122). The aqueous hydrazine is concentrated in a final distillation column. 

In petroleum and oxygenate finish removers, the major ingredient is normally acetone, methyl ethyl ketone [78-93-3], or toluene. Cosolvents include methanol, / -butanol [71-36-3], j -butyl alcohol [78-92-2], or xylene [1330-20-7]. Sodium hydroxide or amines are used to activate the remover. Paraffin wax is used as an evaporation retarder though its effectiveness is limited because it is highly soluble in the petroleum solvents. CeUulose thickeners are sometimes added to liquid formulas to assist in pulling the paraffin wax from the liquid to form a vapor barrier or to make a thick formula. Corrosion inhibitors are added to stabili2e tbe formula for packaging (qv). 

Anhydrous stannous chloride, a water-soluble white soHd, is the most economical source of stannous tin and is especially important in redox and plating reactions. Preparation of the anhydrous salt may be by direct reaction of chlorine and molten tin, heating tin in hydrogen chloride gas, or reducing stannic chloride solution with tin metal, followed by dehydration. It is soluble in a number of organic solvents (g/100 g solvent at 23°C) acetone 42.7, ethyl alcohol 54.4, methyl isobutyl carbinol 10.45, isopropyl alcohol 9.61, methyl ethyl ketone 9.43 isoamyl acetate 3.76, diethyl ether 0.49, and mineral spirits 0.03 it is insoluble in petroleum naphtha and xylene (2). 

Oil Content. The production of petroleum waxes involves the removal of oil therefore, the oil content (actually the percentage of oil and low molecular weight fractions) is one indication of the quaUty of the wax. Oil content is deterrnined (ASTM D721) as that percentage of the wax soluble in methyl ethyl ketone at —31.7 C. 

Dihydrostreptomycin sesquisulfate [5490-27-7] M 461.4, m 250 (dec), 255-265 (dec), [a]p -92.4 (c 1, H2O), pKgsJd)-- 9.5 (NMe), pKes,(2,3) 13.4 (guanidino). It crystallises from H2O with MeOH, -BuOH or methyl ethyl ketone. The crystals are not hygroscopic like the amorphous powder, however both forms are soluble in H2O but the amorphous solid is about 10 times more soluble than the crystals. The free base also crystallises from H20-Me2C0 and has [a]p -92° (aqueous solution pH 7.0). [Solomons and Regina Science 109 515 7949 Wolf et al. Science 109 515 7949 McGilveray and Rinehart J Am Chem Soc 87 4003 1956]. 

More frequently either methyl ethyl ketone peroxide or cyclohexanone peroxide is used for room temperature curing in conjunction with a cobalt compound such as a naphthenate, octoate or other organic solvent-soluble soap. The peroxides (strictly speaking polymerisation initiators) are referred to as catalysts and the cobalt compound as an accelerator . Other curing systems have been devised but are seldom used. 

Solvents. NBRs are soluble in aromatic hydrocarbons, chlorinated hydrocarbons, ketones, esters and nitroparaffin compounds. Solvents with high evaporation rate are acetone, methyl ethyl ketone, chloroform and ethyl acetate, among others. Solvents with slow evaporation rate are nitromethane, dichloropentenes, chloro-toluene, butyl acetate and methyl isobutyl ketone. 

Triphenylselenonium chloride is only slightly soluble in anhydrous methyl ethyl ketone (2 g. per 300 cc.). Using the water-methyl ethyl ketone mixture, the substance crystallizes with two molecules of water. This can be removed by heating for half an hour at ioo°, but is again taken up from moist solvents or moist air. 

Solubilities (30 °C, %/w) Methanol 3, Ethyl acetate 67, Methyl ethyl ketone 65, Toluene 77... 

Care should be taken that the distillation for the removal of alcohol and excess methyl ethyl ketone does not stop under 900 or go beyond this temperature. If stopped too soon, the alcohol that is not boiled off later increases the solubility of the dimethylglyoxime and too high a temperature causes the formation of tarry products. Both of these factors reduce the yield. 

Methyl ethyl ether, 10 567 Methyl ethyl ketazine (MEK), 13 582, 583 Methyl ethyl ketone (MEK), 13 700 14 581 adipic acid solubility, l 555t azeotrope with methanol, 8 801 in MEK—MIPK—water system, 22 304-305, 306, 307 peroxide, 14 292... 

With all solvents studied including cyclohexanol, methyl ethyl ketone and cyclohexanone, heptavalent technetium is extracted most effectively from sodium sulfate and weakest from sodium nitrate or sodium perchlorate solutions. The data in Fig. 5 appear to be consistent with those on the solubilities of various sodium salts in pure tri-H-butyl phosphate. For example, the solubility of Na SO in TBP is extremely small compared with NaClO. ... 

Soluble in acetone, alcohol, ether (Weast, 1986), methyl ethyl ketone, tetrahydrofuran, esters, aromatic and chlorinated hydrocarbons (Windholz et ah, 1983)... 

Jones, J.H. and McCants, J.F. Ternary solubility data. 1 -Butanol-methanol 1-butyl ketone-water, 1-butyraldehyde-ethyl acetate-water, 1-hexane-methyl ethyl ketone-water, Ind. Eng. Chem., 46(9) 1956-1958, 1954. 

Phenoxy resins may be extruded, injection-molded, and blow-molded to produce pipe, sporting goods, containers, and appliance housings. Since phenoxy resins are soluble in methyl ethyl ketone, they have been used as adhesives and cross-linkable protective coatings. 

Soluble in Petroleum ether, 50% or higher alcohols, propylene glycol, fats, oils Toluene, alcohols, methyl ethyl ketone, acetone, petroleum ether, benzene, fats, oils Ethanol, oils, ether, fats, oils Oil... 

Methylnaphthalene was then used as a vehicle, but even in this case very poor results were obtained, i.e.y conversion to methyl ethyl ketone (MEK) solubles and distillate products was very low. Results of this run are not reported since they are obscured by extensive solvent cracking. 

The block-polymers containing a middle block of polystyrene and two blocks of polyethylene oxide have some unusual properties. They are soluble in methyl ethyl ketone and cannot be precipitated from this solvent by methanol. Addition of water produces a slight cloudiness but still no precipitation although the block polymer is not soluble in pure water. The polymer is also soluble in benzene, but addition of water to this solution causes its precipitation. On the other hand, neither homopolystyrene nor homo-polyethylene oxide or their mixtures are precipitated from benzene solution by addition of water. This strange behaviour is explained by Richards and Szwarc (45) in terms of hydrogen bonding which depends on the chemical potential of water in the aqueous layer and therefore also in the benzene solution. 

Unfortunately there seems to be no supplementary evidence on copolymerization initiated by phosphines. In a typical experiment, a solution of acrylonitrile in petroleum ether is treated with a little triethyl phosphine. A greenish-brown product settles on the walls of the flask. It is soluble in acetone, furfural, methyl ethyl ketone and DMF. Polymer precipitated from acetone by toluene is of low molecular weight and contains perhaps 0.5% combined phosphorus. In similar experiments it is possible to obtain pale yellow polymers with number average molecular weights of around 30,000 and with about one atom of P per polymer chain. On the basis of these results Horner and coworkers proposed the scheme (72) ... 

As shown in Figures 5 and 7 the nature of the solvent does not appear to have any effect on T0 within experimental error. However, the solvent can have a profound influence on the morphology of cast block copolymer specimens. Thus, instead of the continuous polybutadiene phase normally observed, a continuous polystyrene phase appears to exist in Kraton 101 films cast from solution in MEK/THF mixtures (2). Methyl ethyl ketone has a solubility parameter of 9.3, only slightly higher than that of the solvents used in our work. It is clear from the data presented here that our films must have had continuous polybutadiene phases. 

Incorporation of carboxyl groups in vinyl polymers (J) and polyolefins (1, 7) improves the adhesion of these polymers to various materials. However, many of these carboxylated polymers, particularly the carboxylated polyolefins, have limited solubility in volatile, lacquer-type solvents such as butyl acetate or methyl ethyl ketone and thus are limited in their ability to improve the adhesion of coatings applied from solvents. Carboxylated polyesters that are soluble in these solvents can be prepared. We were therefore interested in determining the effects of structure and carboxyl content on the adhesion of coatings of various classes of polymers blended with carboxylated polyesters. 

Preparation and Solubility of Polyesters. A number of polyesters were prepared from several diols and dicarboxylic acid esters to determine the effect of structure on the solubility in typical solvents used in lacquers. The data in Table I show that solubility in the solvents decreased in the following order toluene > methyl ethyl ketone > butyl acetate. Polymers that were soluble in all three solvents are examples 9-14. 

The carboxylated polyesters based on examples 9-14 in Table I were soluble in butyl acetate and methyl ethyl ketone, but it was necessary to add up to 10% of an alcohol (methyl or butyl) to toluene to give solubility. Some of these carboxylated polyesters were also soluble in plasticizers. Carboxylated T50I(NPG) and T50H(NPG) (3000-molecu-lar weight segments extended with PMDA) were soluble in dibutyl phthalate but not in dioctyl phthalate. The similar H( NPG) carboxylated polyester was soluble in both dibutyl and dioctyl phthalates, but it was inferior to the above two polymers in promoting adhesion. 

The majority of characterized solvates are stoichiometric, with either water or organic solvents present in a Lxed ratio with the drug molecules. Glibenclamide was isolated as two nonsolvated polymorphs, a pentanol solvate, and a toluene solvate (Suleiman and Najib, 1989). Furosemide could form solvates with dimethylformamide or dioxane (Matsuda and Tatsumi, 1989). Haleblian and McCrone (1969) studied the solid forms of steroids, and found different dissolution rates for two monohydrates of Luprednisolone, a monoethanol and hemiacetone solvate of prednisolone and two monoethanolates and a hemichloroform solvate of hydrocortisone. Other solvents that have been reported to form solvates with drugs include methyl ethyl ketone, propanol, hexane, dimethylsulfoxide, acetonitrile, and pyridine. The potential toxicity concerns eliminate most of these from consideration as practical mechanisms of solubility enhancement for human therapeutics. 

MW 100.12 CAS [80-62-6] used in the manufacture of plastics and resins colorless liquid polymerizes boils at 100°C vapor pressure 35 torr at 20°C density 0.944 g/mL soluble in benzene, chloroform, tetrahydrofuran, and methyl ethyl ketone. 

For commercial printing onto nonporous, hydrophobic materials such as plastics, metals, and glass, rapidly drying solvent inks which adhere to these substrates are needed. A typical solvent for these applications is methyl ethyl ketone (MEK). However, alternative alcoholic solvents tike ethanol and N-propanol have been introduced for ecological and safety reasons. The predominant color for industrial marking is black, and solvent soluble 2 1 azo chromium(m) complex, polyazo, Nigrosine, and sulfur dyes are used. Typical formulation of an... 

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