Process for recycling and regenerating carbonylation catalyst us

Details Process for recycling and regenerating carbonylation catalyst us Process for recycling and regenerating carbonylation catalyst us

1990-12-04

1991-10-08

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5110

Patent

active

050556118

ABSTRACT:
A process for preparing ibuprofen is described. The improved process involves the treatment of spent palladium carbonylation catalyst with oxygen at about 300.degree. C. to about 850.degree. C. The treated material then used with a phosphine ligand to carbonylate 1-halo-1-(4-isobutyl-phenyl)ethane, 1-hydroxyl-1-(4-isobutylphenyl)ethane, or isobutylstyrene to produce ibuprofen.

REFERENCES:
patent: 4013583 (1977-03-01), Knifton
patent: 4013584 (1977-03-01), Knifton
patent: 4038208 (1977-07-01), Knifton
patent: 4042530 (1977-08-01), Knifton
patent: 4048093 (1977-09-01), Knifton
patent: 4981995 (1991-01-01), Elango

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