Organic ethylene glycol derivatives

The quasi-linear relationship between the logarithm of the retention factor and volume fraction organic cosolvent in the mobile lase seems to be the general rule in RPC. However, special effects can ur to cause this rule to be violated. Marked deviation from linearity was observed by Melander et al. (158) with retention data o poiy(ethylene glycol) derive-... 

Totten GE, Clinton NA (1988) Poly[ethylene glycol] derivatives as phase transfer catalysts and solvents for organic reactions. J Macromol Sci Rev 28(2) 293-337... 

Totten, G. E., and N. A. Clinton, Poly(ethylene glycol) Derivatives as Phase Transfer Catalysts and Solvents for Organic Reactions, ... 

Two types of magnesia, caustic-calcined and periclase (a refractory material), are derived from dolomitic lime. Lime is required in refining food-grade salt, citric acid, propjiene and ethylene oxides, and ethylene glycol, precipitated calcium carbonate, and organic salts, such as calcium stearate, lactate, caseinate. 

If the metallisable dye is insoluble in water, a miscible solvent such as ethanol or ethylene glycol may be added. Polar solvents such as formamide or molten urea have sometimes been preferred. It is likely that such solvents will preferentially displace water molecules and coordinate with the chromium (III) ion as the first step in the reaction. If colourless organic chelates of chromium, such as those derived from oxalic or tartaric acid, are used instead of or in addition to hydrated chromium (III) salts, the difficulty of replacing the strongly coordinated water molecules in the first stage of the reaction is eliminated. In this way the initial reaction can be carried out at high pH without contamination by the precipitation of chromium hydroxide. Use of the complex ammonium chromisalicylate (5.12) in this connection should also be noted (section 5.4-1). 

Fermentation-derived organic acids and their esters are potentially important chemical feedstocks for polymers and specialty polymers, but most significantly as alternative solvents for industrial and consumer applications. For example, lactate esters are derived from renewable carbohydrate raw materials such as cornstarch. They exhibit much lower toxicity compared with halogenated hydrocarbons and ethylene glycol ethers and are environmentally benign. Some studies suggested that lactate ester solvents have the potential of replacing petroleum-based solvents... 

Properties Colorless liquid ethereal odor. Bp 101.3C, fp 10-12C, d 1.0356 (20/20C), 8.61 lb/gal (20C), refr index 1.4221 (20C), flash p 65F (18.3C) (ASTM OC), autoign temp 356F (180C). Stable. Miscible with water and most organic solvents. Derivation (1) From ethylene glycol by treatment with acid (2) from (3,(3-dichloroethyl ether by treatment with alkali. 

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