Catalyst recovery process

Details Catalyst recovery process Catalyst recovery process

C - Chemistry, Metallurgy

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B

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C22B 3/00 (2006.01) B01J 31/40 (2006.01) C01G 55/00 (2006.01) C07C 51/56 (2006.01) C07C 51/573 (2006.01) C22B 3/16 (2006.01) C22B 7/00 (2006.01)

Patent

CA 1263365

Catalyst Recovery Process Abstract Disclosed is a process for the recovery of noble metals from a catalyst-tar formed in a process in which acetic anhydride is prepared by carbonylating methyl acetate in the presence of a noble metal containing catalyst such as rhodium, lithium and methyl iodide. The rhodium is recovered from the tar formed in the process by treating the catalyst containing tar with a lower fatty acid at a tempera- ture of at least 100°C. thereby isolating the noble metal which precipitates from the tar.

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