Process for the epoxidation of olefins

US6646141B2 · kind B2 · utility

Assignees

• Degussa AG · DE
• UHDE GMBH · DE

Inventors

• Willi Hofen · Rodenbach, DE
• Georg Thiele · Hanau, DE
• Alexander Moller · Gelnhausen, DE

Key dates

• Filing date: Oct 4, 2002
• Grant date: Nov 11, 2003
• Expiry date: Oct 4, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D301/32
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the working up of a product stream from the epoxidation of olefins that contains olefin, olefin oxide, water-miscible organic solvent and water, by separating this product stream into an overhead product containing olefin, olefin oxide and organic solvent, and into a bottom product containing organic solvent and water, wherein the separation takes place in a pre-evaporator with at most 5 theoretical separation stages, and 20 to 60% of the total amount of organic solvent introduced with the product stream is removed with the overhead product and the residue remains in the bottom product, as well as a process for the epoxidation of olefins that includes this working up stage.