Process for separating off alkanols from other organic compounds

Details Process for separating off alkanols from other organic compounds Process for separating off alkanols from other organic compounds

1994-06-07

1996-04-02

Evans, Joseph E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

560248, 564216, 564497, 568410, 568411, 568699, 568868, 568913, 570262, C07C 2726, C07C 2976, C07C 6996, C07C 4134

Patent

active

055042392

ABSTRACT:
A first alkanol having from 1 to 3 carbon atoms can be separated off from other organic compounds of higher carbon number from the group comprising other alcohols, polyalcohols, ethers, oxo compounds, esters of carboxylic acids and of carbonic acid, haloaliphatics, amines, amides, hydrocarbons, carboxylic acids and nitriles, which in each case have at least 1 carbon atom more than the first alkanol, where in the case of halogenoaliphatics, halogen substituents are counted as further carbon atoms, by permeation on membranes, if a water content from 1 to 30% by weight, preferably from 5 to 15% by weight, based on the amount of mixture and water, is maintained.

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Chemical Abstracts, 38-Plastics Fabr. Uses, vol. 115, 1991, p. 91; CA# 51546h, "Composite pervaporation membrane and dewatering of amines therewith", H. Brueschke et al.
Chemical Abstracts, vol. 90, 1979, p. 556; CA# 168056e, "Separation of dimethylcarbonate from its azeotrope with methanol", H. J. Buysch et al.
Chemical Abstracts, 28-Aliphatics, vol. 9, 1979, p. 601; CA# 192848f, "purification of dimethyl carbonate", K. Fischer et al.
Chemical Abstracts, 23-Aliphatics, vol. 85, 1976, p. 495; CA# 159462d, "Recovery of dimethyl carbonate from its azeotropic mixture with methanol", U. Romano.

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