Process for separating off alkanols from other organic compounds of higher carbon number

US5504239A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolf Mehl · Neunburg vorm Wald, DE
• Wolfgang Scheinert · Leverkusen, DE
• Ingo Janisch · Gützkow, DE
• Andreas Groschl · Leverkusen, DE

Key dates

• Filing date: Jun 7, 1994
• Grant date: Apr 2, 1996
• Expiry date: Jun 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/76
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

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.