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. 13, 1985
Filed:
May. 17, 1984
Applicant:
Inventor:
John Cook, Sproatley, GB;
Assignee:
BP Chemicals Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260549 ;
Abstract
Acetic anhydride is prepared by reacting, at elevated temperature, methyl acetate or dimethyl ether with carbon monoxide in the presence of an effective amount of a catalyst which comprises: (1) cobalt, (2) a compound containing at least one quaternary nitrogen or phosphorus atom and (3) a source of iodide or bromide wherein the atomic ratio of iodide or bromide to cobalt is from 0.5:1 to 5:1. The compound containing at least one quaternary nitrogen or phosphorus atom can optionally be generated in situ by a quaternization reaction.