Process for the production of therephthalic acid

Details Process for the production of therephthalic acid Process for the production of therephthalic acid

1993-01-06

1995-06-20

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562485, 562487, 568858, 568868, C07C 51487

Patent

active

054262178

ABSTRACT:
A process for the production of terephthalic acid comprises subjecting polyalkylene terephthalate to hydrolysis using a ratio of water to polyalkylene terephthalate in the mixture prior to heating and carrying out the reaction under conditions such that, at the reaction temperature, a significant proportion of the terephthalic acid produced is in the solid phase. The degree of recrystallization necessary to recover the terephthalic acid produced is thereby reduced. The reaction can with advantage be carried out with alkylene glycol present in the mixture prior to hydrolysis.

REFERENCES:
patent: 4578510 (1986-03-01), Doerr
patent: 4620032 (1986-10-01), Doerr
patent: 5095145 (1992-03-01), Rosen

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