Method of preparing 1,3-propanediol

US5015789A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Dietrich Arntz · Oberursel, DE
• Norbert Wiegand · Rheinfelden (Baden), DE

Key dates

• Filing date: Aug 3, 1990
• Grant date: May 14, 1991
• Expiry date: Aug 3, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/64
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for preparing 1,3-propanediol is disclosed which comprises the hydration of acrolein in the presence of an acidic cation exchanger resin and the hydrogenation of the 3-hydroxypropionaldehyde obtained in the first stage. The volume-time yield was able to be increased in the hydration stage by using a cation exchanger resin with phosphonic acid groups, preferably a cation exchanger with chelating aminophosphonic acid groups. The hydrogenation catalyst can be repeatedly reused without appreciable loss of activity.