Process for the preparation of 2,2-dimethylpropanediol-1,3

US4918247A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• Norbert Breitkopf · Oberhausen, DE
• Wolfgang Hofs · Oberhausen, DE
• Heinz Kalbfell · Schermbeck, DE
• Franz Thonnessen · Oberhausen, DE
• Peter Lappe · Dinslaken, DE
• Helmut Springer · Dinslaken, DE

Key dates

• Filing date: May 26, 1989
• Grant date: Apr 17, 1990
• Expiry date: May 26, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/75
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Preparation of 2,2-dimethylpropanediol-1,3 by the aldol addition of isobutyraldehyde and formaldehyde using tri-n-propylamine as a catalyst, followed by hydrogenation of the reaction mixture, and subsequent distillation of the hydrogenation product in the presence of isobutanol and water.