Oxidative secondary rhodium recovery process

Details Oxidative secondary rhodium recovery process Oxidative secondary rhodium recovery process

C - Chemistry, Metallurgy

22

B

C22B 11/00 (2006.01) B01J 31/40 (2006.01) B01J 38/48 (2006.01) B01J 38/60 (2006.01) C01G 55/00 (2006.01) C07C 51/573 (2006.01)

Patent

CA 2061825

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. jft\applnsff\US695066

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