Preparation of microcrystalline triacetylcellulose

US4697007A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Georg Seitz · Darmstadt, DE
• Rainer Wernicke · Neu-Isenburg, DE

Key dates

• Filing date: Mar 1, 1985
• Grant date: Sep 29, 1987
• Expiry date: Mar 1, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2220/54
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The preparation of microcrystalline triacetylcellulose by acid-catalyzed acetylation of microcrystalline cellulose, perfluoroalkanesulfonic acids with 1 to 8 carbon atoms are used as the catalyst, resulting in a non-hazardous process and high yields of exceptionally high purity product, the latter being particularly suitable for chromatographic purposes, in particular for the chromatographic resolution of racemates.