Immobilised ionic liquids

US6969693B2 · kind B2 · utility

Assignee

• Johnson Matthey PLC · GB

Inventors

• Emmanuelle Sauvage · Dreux, FR
• Michael H. Valkenberg · Aachen, DE
• Christovao P De Castro-Moreira · València, ES
• Wolfgang Hoelderich · Bischofswerda, DE

Key dates

• Filing date: May 6, 2002
• Grant date: Nov 29, 2005
• Expiry date: May 6, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2231/4205
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Ionic liquids are immobilized on a functionalized support which carries or contains one component of the ionic liquid, or a precursor to such a component. The ionic liquid may be immobilized via the anion by treating a support with an anion source, e.g., an inorganic halide, before the ionic liquid is applied or formed. Alternatively, the ionic liquid may be immobilized by having the cation covalently bound to the support, e.g., through silyl groups, or incorporated in the support by synthesizing the support in the presence of a suitable base. The immobilized ionic liquids are of use as catalysts, for example, for the Friedel-Crafts reaction, such as alkylation reaction.