Method for side-chain alkylation or alkenylation

US6984766B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ulrich Steinbrenner · Kohlhof, DE
• Ralf Böhling · Griesheim, DE
• Peter Zehner · Ludwigshafen, DE

Key dates

• Filing date: Aug 10, 2001
• Grant date: Jan 10, 2006
• Expiry date: Nov 2, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S585/95
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for reducing the formation of polymers during side-chain alkylation or side-chain alkenylation of alkylaromatic compounds by reaction with olefins or diolefins in the presence of an alkali metal catalyst followed by distillation in order to isolate the alkylated or alkenylated compound, the alkali metal is present in the catalyst on an inorganic support, and the catalyst is mechanically separated from the reaction mixture after the reaction and before the distillation.