Process for preparing fluorine-containing ethane derivatives

US5227546A · kind A · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

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

Key dates

• Filing date: Sep 8, 1992
• Grant date: Jul 13, 1993
• Expiry date: Sep 8, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/21
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for preparing fluorine-containing ethane derivatives using hydrogen fluoride and a catalytically active formulation comprising a tantalum fluorosulfonate compound or a niobium fluorosulfonate compound is described. The process is particularly suitable for preparing ethane derivatives which contain a CF.sub.3 group, for example for preparing C.sub.3 CHCl.sub.2 (R123) from perchloroethylene.