Process for preparing hexafluorochlorobutenes

US5523497A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Norbert Lui · Odenthal, DE
• Albrecht Marhold · Leverkusen, DE
• Dietmar Bielefeldt · Ratingen, DE

Key dates

• Filing date: Oct 25, 1994
• Grant date: Jun 4, 1996
• Expiry date: Oct 25, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/269
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1,1,1,4,4,4-hexafluoro-chlorobutenes are obtained by pyrolysis of 1,1,1-trifluoro-2,2-dichloroethane. The hexafluoro-chlorobutenes obtained in this way can be converted into hexafluorobutane, a CFC substitute, by hydrogenation.