Method of isolating trans-1,1,4,4-tetraalkyl-2-butene-1,4-diols

US5053561A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietmar Bender · Schifferstadt, DE
• Klaus Bronstert · Eisenberg (Pfalz), DE
• Martin Fischer · Ludwigshafen, DE
• Gregor Schuermann · Reutlingen, DE

Key dates

• Filing date: Jun 13, 1990
• Grant date: Oct 1, 1991
• Expiry date: Jun 13, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B2200/09
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of isolating trans-1,1,4,4-tetraalkyl-2-butene-1,4-diols of formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different and denote C.sub.1 - to C.sub.5 -alkyl, from mixtures thereof with their cis-isomers, wherein the trans-isomer is separated from the cis-isomer by liquid-liquid extraction.