Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1987-09-08
1989-03-14
Killos, Paul J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C07C 6500
Patent
active
048125946
ABSTRACT:
Aqueous solutions of crude p-hydroxymethylbenzoic acid are purified to relatively low levels of 4-carboxybenzaldehyde by hydrogenation in the presence of a nickel on kieselguhr catalyst. 4-carboxybenzaldehyde is hydrogenated to p-hydroxymethylbenzoic acid. Toluic acid production is minimal.
REFERENCES:
patent: 4721808 (1988-01-01), Lillwitz
Amoco Corporation
Clarke William C.
Killos Paul J.
Magidson William H.
Medhurst Ralph C.
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