Preparation of glutaric dialdehyde

US5679868A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz-Josef Kneuper · Mannheim, DE
• Rainer Becker · Bad Dürkheim, DE
• Eugen Gehrer · Stockach, DE
• Juergen Schossig
• Andreas Henne · Neustadt, DE

Key dates

• Filing date: Dec 12, 1995
• Grant date: Oct 21, 1997
• Expiry date: Dec 12, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of glutaric dialdehyde by the reaction of alkoxy dihydropyrans of the general formula I ##STR1## in which R stands for C.sub.1 to C.sub.20 alkoxy, with water at temperatures ranging from 0.degree. to 150.degree. C. and pressures of from 0.01 to 50 bar in the presence of a which microporous, crystalline aluminum silicate catalyst, e.g. a beta-type zeolite or pentasil catalyst having a pore diameter greater than 5.4 .ANG..