Use of a settling accelerator in epoxidation

US6828449B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Juergen Herwig
• Martin Roos · Oestrich-Winkel, DE
• Georg Oenbrink · Schneverdingen, DE
• Bernd Guenzel · Haltern am See, DE
• Joerg Lohmar · Dortmund, DE

Key dates

• Filing date: Oct 9, 2003
• Grant date: Dec 7, 2004
• Expiry date: Oct 9, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D301/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Settling times of a catalyst in the epoxidation of a cyclic, at least monounsaturated alkene are improved by a method, comprising epoxidizing a cyclic, at least monounsaturated alkene having from 8 to 20 carbon atoms in the ring in a reaction medium containing an oxidant and a catalyst system comprising at least one metal of Groups 4, 5 and 6 of the Periodic Table of the Elements, phosphoric acid and a phase transfer catalyst and a cyclic alkane having from 8 to 20 carbon atoms in the ring, which corresponds to the alkene reactant, as settling accelerator in the epoxidation reaction.