Process for the manufacture of phosphinic and phosphonic acid anhydrides

US4267125A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Walter Dursch · Königstein, DE
• Hans-Jerg Kleiner · Kronberg, DE

Key dates

• Filing date: Feb 27, 1980
• Grant date: May 12, 1981
• Expiry date: Feb 27, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/3895
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for the manufacture of phosphinic and phosphonic acid anhydrides by reacting phosphinic and phosphonic acid halides with an aliphatic carboxylic acid anhydride and removing the carboxylic acid halide having been formed by distillation.