Process for the recovery of group viii noble metals

Details Process for the recovery of group viii noble metals Process for the recovery of group viii noble metals

B - Operations, Transporting

01

J

B01J 38/60 (2006.01) B01D 11/00 (2006.01) C07C 51/48 (2006.01) C07C 51/573 (2006.01)

Patent

CA 2101963

ABSTRACT OF THE DISCLOSURE PROCESS FOR THE RECOVERY OF GROUP VIII NOBLE METALS In the process for revovery of Group VIII noble metal carbonylation catalyst from a process stream which also contains tar produced during a carbonylation process for carboxylic acid anhydride production, the process stream is diluted with alkyl halide and then extracted with a water, carboxylic acid, iodide salt alkyl halide solution, the iodide salt being a co-promoter derived from the carbonylation process. The recovered noble metal may be recycled to the carbonylation process with iodide salt co-promoter.

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