Patent · US Expired

Chlorofluoro (hydro) carbon conversion process

US5430201A · kind A · utility

0Cited by

6References

9Claims

0Family size

Assignee

SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

Hans-Walter Swidersky · Hannover, DE
Johannes Eicher · Garbsen, DE
Thomas Born · Holle, DE
Carsten Brosch · Seelze, DE
Werner Rudolph · Hannover, DE

Key dates

Filing date	Oct 14, 1994
Grant date	Jul 4, 1995
Priority date	—
Expiry date	Oct 14, 2014

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C17/358
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for preparing R113a from R113, and R123 from R123a or R123b by rearrangement over AlCl.sub.3, in which when the reaction mixture is heated sudden start-up of the reaction, which often causes large amounts of heat to be released and the reaction to run away, is prevented by using a specially activated AlCl.sub.3, which has been activated by means of a metal halide selected from the group consisting of NaF.nHF with 0<n.ltoreq.2, AgCl and FeCl.sub.3. In addition to it being considerably easier to control the reaction, shorter reaction times for the rearrangement and a decrease in the amount of by-products which are formed, are observed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.