Process for the recovery of rhodium from residues of...

Details Process for the recovery of rhodium from residues of... Process for the recovery of rhodium from residues of...

C - Chemistry, Metallurgy

22

B

C22B 3/44 (2006.01) B01J 31/40 (2006.01) C01G 55/00 (2006.01) C07C 51/573 (2006.01) C22B 7/00 (2006.01)

Patent

CA 2092049

The present invention relates to a process for the recovery of rhodium from acetic anhydride-containing residues, which are produced in the carbonylation of methanol and/or methyl acetate and/or dimethyl ether. A carboxylic acid having 2 to 5 carbon atoms is added to the residue, the mixture is heated, 1 to 10 mol of methanol per mol of acetic anhydride are added, the constituents boiling more readily than the carboxylic acid are distilled off, the mixture is cooled and the rhodium-containing residue is separated.

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