Preparation of polyfluorobutenes

US5210340A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Dietmar Bielefeldt · Ratingen, DE
• Albrecht Marhold · Leverkusen, DE

Key dates

• Filing date: Apr 10, 1992
• Grant date: May 11, 1993
• Expiry date: Apr 10, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/21
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1,1,1,2,4,4,4-Heptafluoro-2-butene and 2-chloro-1,1,1,4,4,4-hexafluoro-2-butene 1,V5VjV9are prepared simultaneously by reacting hexachlorobutadiene with hydrogen fluoride with the addition of catalytic amounts of titanium halide, antimony trihalide and/or antimony pentahalide.