Solvent, solvents isopropyl alcohol

Solvent, 30% isopropyl alcohol temperature, 73.35°C. Data from Salomon,... 

Two studies compared sonication with Soxhlet extraction with pentane [13], acetone/hexane [13] and hexane/ispropyl alcohol (70 30) [5], The first two Soxhlet extraction solvents yielded lower recoveries than sonication, but the most polar solvent hexane/isopropyl alcohol gave recoveries and relative standard deviations for NP and NPE0i i9 comparable with sonication with hexane/acetone [5],... 

A different method of reductive cleavage was developed which employed photolysis of cyclopropyl ketones in a hydrogen donor solvent, usually isopropyl alcohol.This photoreduction gave rearranged ketones and alcohols which were routinely oxidized, as in the lithium/ ammonia process. 

Bur man [72] has investigated the optimum MAE conditions of extraction of Irganox 1010 from PP films. Two different solvent combinations, isopropyl alcohol (IPA) cyclohexane and acetone cyclohexane were compared. Figures 8 and 9 show the extraction yields from these two combinations, re-... 

The acidity of solvents used in paint, varnish, and lacquer is determined by the titration of solvent diluted with water (for water soluble solvents) or isopropyl alcohol or ethanol (for water insoluble solvents) in proportion of 1 1. A water solution of 0.05 N sodium hydroxide in the presence of 0.5% phenolphthalein indicator dissolved in ethanol or isopropanol is used for titration. The method is usefirl for determination of acidity below 0.05%. Acidity is a result of contamination or decomposition during storage, transportation or manufacture. The method is used to assess compliance with specification. 

Figure 2. (A) Composite TLC of phytotoxins from root extracts of sorghum on normal silica gel plate showing elution of 1 - 10, developing solvent hexane isopropyl alcohol (90 10) (B) representative TLC of congeners of on silica gel impregnated with 5% AgNOs showing separation of 1, and 4-7, developing solvent hexane acetone methylene chloride (7 2 1). O, origin SF, solvent front.

Actives Content, wt % 60 Solvent Isopropyl alcohol/water Appearance Clear, pale-yellow liquid Color, max 200 (APHA)... 

In a previous work, Kim and Shahinpoor [11] have reported a newly developed fabrication method that can scale up or down the IPMNC artificial muscles in a strip size of micro-to-centi-meter thickness, using the liquid form of perfluorinated ionic polymers. By meticulously evaporating the solvent (isopropyl alcohol) out of the solution, recast ionic polymer can be obtained. A number of these samples are shown in Figure 7.3. 

C5H10O2, CHjCOOPr. Colourless liquid with a fragrant odour b.p. 88 C. Manufactured by leading propene into hot ethanoic acid containing sulphuric acid, or by heating isopropyl alcohol with ethanoic and sulphuric acids. Used as a solvent for cellulose nitrate and various gums. 

Filters for use in sterile gas filtration must conform to standards similar to those mandated for sterile hquid filtration. Nondestmctive integrity tests may be apphed. The tests are performed by wetting the filter with an appropriate solvent, commonly 60/40 isopropyl alcohol/water for hydrophobic membranes, and applying air or nitrogen gas at a preset pressure. 

Until World War 1 acetone was manufactured commercially by the dry distillation of calcium acetate from lime and pyroligneous acid (wood distillate) (9). During the war processes for acetic acid from acetylene and by fermentation supplanted the pyroligneous acid (10). In turn these methods were displaced by the process developed for the bacterial fermentation of carbohydrates (cornstarch and molasses) to acetone and alcohols (11). At one time Pubhcker Industries, Commercial Solvents, and National Distillers had combined biofermentation capacity of 22,700 metric tons of acetone per year. Biofermentation became noncompetitive around 1960 because of the economics of scale of the isopropyl alcohol dehydrogenation and cumene hydroperoxide processes. 

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