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:
Mar. 31, 1992
Filed:
May. 03, 1991
Applicant:
Inventors:
Carl F Fillers, Greeneville, TN (US);
Eric D Middlemas, Nickelsville, VA (US);
Charles E Outlaw, Kingsport, TN (US);
Jerry A Barron, Gray, TN (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C22B / ; C07C / ;
U.S. Cl.
CPC ...
502 24 ; 423 22 ; 502 22 ; 502 28 ; 502 32 ; 562891 ;
Abstract
Disclosed is an oxidative process for recovering rhodium catalyst values from 'tars' formed during the preparation of acetic anhydride by the rhodium catalyzed carbonylation of a mixture of methyl iodide and methyl acetate and/or dimethyl ether. The disclosed process includes the treatment of a tar/methyl iodide solution, which contains rhodium values normally not extracted by aqueous hydrogen iodide, with a solution of hydrogen peroxide and acetic acid.