Purification of terephthalic acid

Details Purification of terephthalic acid Purification of terephthalic acid

1985-06-17

1986-12-02

Trousof, Natalie

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

Organic compounds

Carboxylic acids and salts thereof

502185, 562485, C07C 5142

Patent

active

046265988

ABSTRACT:
An improved method for producing purified terephthalic acid by catalytic hydrogenation is disclosed. Control of the reduction of colored compounds during the production of purified terephthalic acid is effected by modulating solution hydrogen concentration during hydrogenation.

REFERENCES:
patent: 3546285 (1970-12-01), Witt
patent: 3584039 (1971-06-01), Meyer
patent: 3639465 (1972-02-01), Olsen et al.
patent: 3726915 (1973-04-01), Pohlmann
patent: 4126638 (1978-11-01), Alagy et al.
patent: 4405809 (1983-09-01), Stech et al.

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