Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Patent
1993-08-02
1994-11-15
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
423 22, 502 25, 502 28, 502 32, 562891, B01J 3140, B01J 3868, C22B 1104, C07C 5312
Patent
active
053648226
ABSTRACT:
In the process for recovery 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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Patent Abstracts of Japan, vol. 11, No. 268, Aug. 29, 1987.
BP Chemicals Limited
Konopka Paul E.
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