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:
Oct. 21, 1986
Filed:
Mar. 07, 1984
Applicant:
Inventors:
Jean Gauthier-Lafaye, Lyons, FR;
Robert Perron, Charly, FR;
Assignee:
Rhone-Poulenc Industries, Courbevoie, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260549 ;
Abstract
The invention relates to a process for the preparation of acetic anhydride by carbonylation. In the process, carbon monoxide is reacted with methyl acetate in the liquid phase, in a carboxylic acid, in the presence of an effective amount of nickel, methyl iodide, an ionic iodide selected from the group consisting of quaternary ammonium iodides, quaternary phosphonium iodides, sodium iodide, potassium iodide and cesium iodide, and a co-catalyst selected from the group consisting of lithium salts and alkaline earth metal salts.