The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1993
Filed:
Jul. 09, 1992
Applicant:
Inventors:
Willi Dafinger, Emmerting, DE;
Ludwig Schmidhammer, Haiming, DE;
Assignee:
Wacker-Chemie GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
570176 ;
Abstract
A process is provided for the hydrogenation of chloromethanes of the formula CH.sub.n Cl.sub.m, where n=0 to 3 and m=4-n, with hydrogen at a temperature of 150.degree. to 250.degree. C. and under an absolute pressure of 1 to 10 bar, by means of a supported catalyst comprising an activated charcoal support with a BET surface area of more than 500 m.sup.2 /g, 0.5 to 20% by weight of copper in elemental or chemically bonded form and 0.01 to 1.0% by weight of rhodium or palladium in elemental or chemically bonded form, and with 0.1 to 10.0% by weight of a water-soluble phosphonium halide.