Patent · US Expired

Catalysts for fluorination and/or dismutation reactions on halogenated hydrocarbons, and a process for their preparation

US4547483A · kind A · utility

14Cited by

2References

6Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Thomas Muller · Bad Homburg vor der Höhe, DE
Gunter Siegemund · Hofheim, DE

Key dates

Filing date	Jun 27, 1984
Grant date	Oct 15, 1985
Priority date	—
Expiry date	Jun 27, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C17/206
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process is specified for preparing a chromium- and magnesium-containing catalyst for fluorination reactions by precipitating chromium(III) hydroxide. In this process, 1 mole of a water-soluble chromium(III) salt is reacted with at least 1.5 moles of magnesium hydroxide or magnesium oxide in the presence of water, and the reaction mixture--if necessary by evaporation--is converted into a paste which contains chromium(III) hydroxide and a magnesium salt. The paste is dried and treated with hydrogen fluoride at temperatures of 20.degree. to 500.degree. C.

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