Method of preparing fluorine-containing ethane derivatives

US5171900A · kind A · utility

Assignee

• Kali-Chemie Aktiengesellschaft · DE

Inventors

• Johannes Eicher · Garbsen, DE
• Karlheinz Fazniewscy · Lehrte, DE
• Werner Rudolph · Hannover, DE
• Hans-Walter Swidersky · Hannover, DE

Key dates

• Filing date: Apr 11, 1991
• Grant date: Dec 15, 1992
• Expiry date: Apr 11, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2231/32
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of preparing fluorine-containing ethane derivatives using a catalyst mixture which comprises a metal halide and a sulfonic acid derivative is described. The method is particularly well suited for preparing CF.sub.3 CHCl.sub.2 (R123) from perchloroethylene and for preparing CF.sub.3 CH.sub.2 F (R134a) from trifluoroethylene.