Methyl cellosolve, as solvent

Karl Fischer Reagent, single solution stabilized, methyl cellosolve as solvent, eg, catalog No So-K-3, diluted to about 2mg/ml titer with methyl cellosolve or a commercial diluent, eg, catalog No So-K-5 of Fisher Scientific Co... 

Homologous mono-alkyl ethers of ethylene glycol, such as monoethyl glycol (or 2-ethoxyethanol), HOC2H4OC2H5, form excellent solvents as they combine to a large extent the solvent properties of alcohols and ethers. The monoethyl and the monomethyl members have the technical names of ethyl cellosolve and methyl cellosolve respectively. Dioxan... 

Mono-alkyl ethers of ethylene glycol, ROCHjCHjOH. The mono methyl, ethyl and n-butyl ethers are inexpensive and are known as methyl cellosolve, cellosolve, and butyl cellosolve respectively. They are completely miscible with water, and are excellent solvents. The commercial products are purified by drying over anhydrous potassium carbonate or anhydrous calcium sulphate, followed by fractionation after... 

The monoalkyl ethers with R = CHj, CjHj and C4H, , known respectively as methyl ceUoaolve, ceUosolve and hutyl cellosolve, are of great commercial value, particularly as solvents, since they combine the properties of alcohols and ethers and are miscible with water. Equally important compounds are the carbitols (monoalkyl ethers of diethyleneglycol) prepared by the action of ethylene oxide upon the monoethers of ethylene glycol ... 

Five grams of potassium hydroxide (85% KOH) is dissolved in 100 ml. of Methyl Cellosolve (Note 1) in a 500-ml. flask (Note 2) fitted with a mechanical stirrer, reflux condenser, and a heating mantle. Dicyandiamide (50.4 g. 0.6 mole) (Note 3) and benzo-nitrile (50 g. 0.485 mole) are added, and the mixture is stirred and heated. A solution is formed, and, when the temperature reaches 90-110°, an exothermic reaction begins and the product separates as a finely divided white solid. The vigor of the reaction is kept under control by the refluxing of the solvent (Note 4). 

Turanose Phenylosazone. A mixture of 4 g. of turanose, 2 ec. of water, and 1 co. of phenylhydrazine was warmed on the steam-bath until solution was complete. To the cooled solution was added 3.5 cc. of phenylhydrazine and 4 cc. of glacial acetic acid, and the mixture returned to the steam-bath for one hour. At the expiration of this time, 40 cc. of warm 60% alcohol was added and, upon cooling, a rapid crystallization of the osazone occurred. The osazone was recovered by filtration and washed with absolute alcohol followed by ether to yield 4.2 g. (69%) of lemon-yellow needles. The osazone is soluble in hot water and separates on cooling as jelly-like particles, but water is not a satisfactory solvent for its purification. It was recrystallized from 15 parts of 95% alcohol with good recovery, as needles which melted with decomposition at 200-205° and rotated [ ]d +24.5° - +33.0° (24 hours, constant value c, 0.82) in a mixture of 4 parts of pyridine, by volume, and 6 parts of absolute ethyl alcohol. In methyl cellosolve (ethylene glycol monomethyl ether) solution it rotated C< 3d" + 44.3°— + 48.5° (24 hours, constant value c, 0.80). 

Mortimer86 has also recommended the two-dimensional method, using ethyl acetate-acetic acid-water and ethyl acetate-formamide-pyridine as developers. Methyl Cellosolve-ethyl methyl ketone-ammonium hydroxide may also be used. Since high content of water and the presence of an alcohol in the solvent mixture gave rise to diffuse spots, formamide was substituted for water. RF values relative to the movement of orthophosphate were determined and found to vary with the distance the solvent moved. Also, in complex mixtures, the presence of some esters resulted in elongation of other ester spots. This effect and the RF variation observed-do not conform to the concept of a liquid-liquid distribution process. 

An acid-catalyzed reaction was carried out using methyl cellosolve (2-methoxyethanol) as the solvent. When the... 

Pyridine combines with both products. A Karl Fischer titration unit is available (A.H. Thomas Co.) for detection of the end point by means of platinum electrodes and a pH meter. A.H. Thomas Co. supplies two solutions which are to be mixed (I2 in CH3OH and SO2 in pyridine) as well as a stabilized single solution (also available from Fisher and MCB). Methyl Cellosolve has been suggested as solvent in place of methanol, A similar reagent utilizing a solution of bromine and sulfur dioxide in chloroform has been described. ... 

Figures 3 and 4 show that furfural and methyl Cellosolve solvents cannot produce butadiene concentrates free of trans-2-butene at solvent-to-feed ratios where the more selective solvents acetonitrile and p-meth-oxypropionitrile (/3-MOPN) are able to reject all of this isomer from the concentrate. In fact, with furfural solvent, considerable loss of butadiene must be accepted to approach a low level of trans-2-butene in the butadiene concentrate. On the other hand, it is possible to recover 100% of the butadiene in the feed while no trans-2-butene is extracted with the /3-methoxypropionitrile or acetonitrile solvents. As much as 40% of the higher boiling cis-2-butene isomer is rejected at 100% butadiene recovery at solvent ratios as low as 12 to 1. These data indicate much lower solvent ratios could be achieved with these solvents.

The most popular solvents used in the formulation of DNQ/novolac resists are propylene glycol monomethylether acetate, ethylene glycol monomethyl or monoethyl ether (cellosolve or methyl cellosolve), and ethyl lactate. For more hydrophobic resins, celloslove acetate (ethylene glycol monoethyl ether acetate) is employed. Ester solvents, particularly acetates such as butyl acetate, are used as diluents, as are aromatic hydrocarbons, such as xylenes. ... 

Acetone and mixture of acetone and methyl cellosolve are commonly used as solvent cements for cellulose acetate. Acetone is a strong solvent for the plastic, but evaporates rapidly. The addition of methyl cellosolve retards the evaporation, prevents blushing, and permits more time for handling the... 

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