Method for the continuous epoxidation of olefins

US4921983A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Rainer Siegmeier · Frankfurt am Main, DE
• Willi Hofen · Rodenbach, DE
• Gunter Prescher · Hanau, DE
• Helmut Maurer · Rodenbach, DE

Key dates

• Filing date: Jul 26, 1989
• Grant date: May 1, 1990
• Expiry date: Jul 26, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D301/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In the continuous epoxidation of olefins with percarboxylic acids, the alkane component which normally accumulates during the circulation of the olefin is reduced by branching off a partial current from the recycled olefin and by additional epoxidation of this olefin with percarboxylic acids as well as a subsequent separation from the epoxide.