Acetone isopropyl alcohol

Recovery of the wopropyl alcohol. It is not usually economical to recover the isopropyl alcohol because of its lo v cost. However, if the alcohol is to be recovered, great care must be exercised particularly if it has been allowed to stand for several days peroxides are readily formed in the impure acetone - isopropyl alcohol mixtures. Test first for peroxides by adding 0-6 ml. of the isopropyl alcohol to 1 ml. of 10 per cent, potassium iodide solution acidified with 0-6 ml. of dilute (1 5) hydrochloric acid and mixed with a few drops of starch solution if a blue (or blue-black) coloration appears in one minute, the test is positive. One convenient method of removing the peroxides is to reflux each one litre of recovered isopropyl alcohol with 10-15 g. of solid stannous chloride for half an hour. Test for peroxides with a portion of the cooled solution if iodine is liberated, add further 5 g. portions of stannous chloride followed by refluxing for half-hour periods until the test is negative. Then add about 200 g. of quicklime, reflux for 4 hours, and distil (Fig. II, 47, 2) discard the first portion of the distillate until the test for acetone is negative (Crotyl Alcohol, Note 1). Peroxides generally redevelop in tliis purified isopropyl alcohol in several days. 

Acetaldehyde, acetone, isopropyl alcohol, ethyl acetate, methyl isobutyl ketone, toluene, butyl acetate, isobutyl alcohol, and acetic acid... 

Sulfamic acid. Potassium hydroxide. Ethanol, Nitric acid. Sulfuric acid. Acetone, Isopropyl alcohol... 

Nitronium tetrafluoroborate. Acetonitrile, Ammonium carbonate. Potassium carbonate. Diethyl ether, Acetone, Ethyl acetate. Butanol Sulfamic acid, Potassium hydroxide. Ethanol, Nitric acid, Sulfuric acid, Acetone, Isopropyl alcohol Dioxane, Potassium nitrite. Potassium bicarbonate, Tetranitromethane Lead acetate, Sodium azide Sodium azide, Lead acetate. Water... 

Propion- aldehyde n-Propyl Alcohol Acrolein Allyl Alcohol Acetone Isopropyl Alcohol... 

The solvents used vary with die nature of the products involved. Widely used are water, hexane, acetone, isopropyl alcohol, furfural, xylene, liquid sulfur dioxide, and tributyl phosphate. Solvent extraction is an important method of both producing and purifying such products as lubrication and vegetable oils, pharmaceuticals, and nonferrous metals,... 

A 0.1% solution of the reagent is prepared by dissolving 0.12 g, of 2,4-dinitrophenylliydrazine in 25 cc. of distilled water and 21 cc. of concentrated hydrochloric acid by warming on the steam bath. The clear yellow solution is then cooled and diluted to 125 cc. with distilled water. For use, several drops of the reagent and a few drops of the acetone-isopropyl alcohol distillate are mixed in a small test tube. The presence of acetone is shown by the formation of a yellow cloudy suspension or precipitate of acetone 2,4-dinitrophenylhydrazone. The test is considered negative if no cloudiness forms within one-half minute when 3 cc. of the reagent is added to 5 drops of distillate. After a negative test is obtained, it is advisable to reflux the mixture for five to fifteen minutes with complete condensation and then to force over a few drops of distillate for another test. If no acetone is observed, reduction is complete. Otherwise the process is continued until no more acetone can be detected. This procedure indicates complete reduction even with ketones which are reduced very slowly. 

Propylene is produced at the rate of about 90 billion pounds per year worldwide, with much of that going to make about 40 billion pounds of polypropylene. The rest is used to make propylene glycol, acetone, isopropyl alcohol, and a variety of other useful organic chemicals (Figure 7-4). 

IFP Acetone Isopropyl alcohol Process uses a high-activity catalyst in an isothermal reactor 4 1982... 

NTA forms hygroscopic crystals or powder, which are soluble in water, acetone, isopropyl alcohol, and ether. It is used in blasting caps and detonators when mixed with RDX, making demolition charges when admixed with nitrocellulose or nitro starch, and in priming mixtures with lead styphnate, lead azide, or diazodinitrophenol. NTA is acidic and readily forms salts... 

The wafer is degreased using acetone, isopropyl alcohol, and ultrapure water (UPW) rinses. 

Azeotropic Isopropyl Alcohol Air, Diethyl Ether, Diisopropyl Ether, Acetone, Isopropyl Alcohol, 2-Butanol, n-Propyl Alcohol, Water Stainless Steel, 1.8 M x 6.4mm I.D. 10% liquid G20/S1A Helium 55 FID None USP (24, p. 927)... 

If we apply (26.73) to the system acetone + chloroform discussed above we find that the term - 2nj In rj always determines the sign of 5. The excess entropy in this case is then associated mainly with the loss in the number of orientations of the monomolecules. Another similar case is that of methanol + carbon tetrachloride (c/. fig. 24.5). On the other hand we must notice that for the systems acetone + ethanol and acetone + isopropyl alcohol the excess entropy is positive... 

Properties White to gray crystalline needles odorless when pure. Mp 84C (technical grade). Soluble in alcohol, acetone, isopropyl alcohol insoluble in water. 

Each substrate was cleaned on the spin coater by rinsing successively with acetone, isopropyl alcohol, and deionized water. 

Another system was studied with x-rays, which should give results similar to when y-rays are used. In the acetone-isopropyl alcohol system Rabani and Stein (57) reported G(H2) as function of pH, acetone, and isopropyl alcohol concentrations. They report GH = 0.55 and Ge = 2.65 at pH 2-4. 

Iodoform, CHI3, tri-iodomethane, is formed when alcohol and certain other compounds (66) are treated with iodine in the presence of an alkali. It can be prepared by adding iodine to a warm aqueous solution of alcohol or acetone which contains sodium carbonate. The iodoform, which separates as a yellow precipitate, is purified by crystallization from dilute alcohol. It crystallizes in yellow, lustrous, six-sided plates, which melt at 119 , and have a peculiar, very characteristic odor. The reactions by which alcohol is converted into iodoform are analogous to those as the result of which chloroform is obtained from alcohol. The formation of iodoform is often used as a test for ethyl alcohol, but as other substances, such as acetone, isopropyl alcohol, and aldehyde yield iodoform when warmed in alkaline solution with iodine, the test is not reliable unless it is known that the other substances which respond to it are absent. Most of the compounds which yield iodoform when treated in this way contain the group CH3.C linked to oxygen. 

There are two isomers of trichloroethane, namely methyl chloroform and 1,1,2-trichloroethane. Animal hepatotoxicity to 1,1,2-trichloroethane is documented in the literature with potentiation of toxicity in association with acetone, isopropyl alcohol and ethanol. Hepatotoxicity, with steatosis, necrosis, elevated serum enzymes, and increased fiver weight have been observed in animal models exposed to 1000 ppm of methyl chloroform. Human studies consist of case reports documenting hepatotoxicity, with elevated serum transaminases and fatty liver disease related to 1,1,1-trichloroethane expo-sine. Epidemiologic evidence suggests httle hepatotoxicity related to this agent at exposure levels <350 ppm. ... 

A technique for the preparation of Eudragit RL-100 acrylic resin microcapsules was developed, which was based on the principle of solvent evaporation. Diclofenac sodium was used as a model drug for encapsulation. A solution of drug and Eudragit dissolved in acetone-isopropyl alcohol was sprayed in liquid paraffin. The microcapsules obtained were unifonu and free flowing particles. The release rate was more sustained by increasing the polymer coneentration. The experimental procedure provided a rapid and eonvenient method for the preparation of Eudragit microcapsules. 8 refs. 

Carotenoid pigments were extracted by chloroform-acetone-isopropyl alcohol /2 l l/ after acetone extraction as described earlier. Lipids of different parts were extracted and their fatty acid composition were analysed by GLC. Tocopherols of different parts of the fruits were extracted, saponified and prepared for HPLC analysis according to Speek and co-workers. Organic acids were prepared by a method described previously. Following preparation the samples were redissolved in a minimal volume of the HPLC eluent. 

Acetone, isopropyl alcohol, methyl and ethyl acetate esters, ethylene glycol monomethyl ether (methyl cellosolve), ethylene glycol monoethyl ether (ethylene cellosolve) and amines have also been examined to determine their suitability for oil extraction from oilseeds (Johnson and Lnsas, 1983) but hexane remains to the choice of solvent for large oilseed extraction operations today. 

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