Process for the epoxidation of CIS double bonds

US6610864B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Bernt Krebs · Munster, DE
• Elisabeth Droste · Goslar, DE
• Markus Piepenbrink · Telgte, DE
• Guido Vollmer · Vellmar, DE
• Georg Oenbrink · Schneverdingen, DE
• Thomas Schiffer · Haltern, DE

Key dates

• Filing date: Nov 5, 2001
• Grant date: Aug 26, 2003
• Expiry date: Nov 5, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2523/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The selective epoxidation of cis double bonds of macrocyclic aliphatic hydrocarbons having 8 to 20 ring carbon atoms occurs by a catalytic process. The macrocyclic aliphatic hydrocarbons may optionally contain one or more side chains and in which at least one further trans double bond is simultaneously present. The used catalyst system consists of a cationic phase-transfer catalyst and an anionic polyoxometallate which is a polytungstate or a polymolybdate. Additionally, it comprises one or more elements selected from germanium, tin, lead, arsenic, antimony, bismuth, selenium, tellurium and polonium, and optionally one or more transition metals from group 4 to 12 of the Periodic Table.