Process for the preparation of terephthalic acid and its isomers

Details Process for the preparation of terephthalic acid and its isomers Process for the preparation of terephthalic acid and its isomers

1996-01-18

1997-10-21

Barts, Samuel

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5109

Patent

active

056798482

ABSTRACT:
A process for the preparation of terephthalic acid (TA) from pure dimethyl terephthalate (DMT) and/or DMT intermediate product by hydrolysis in a countercurrent reactor at a conversion of greater than 99% and crystallization to give the solid product, characterized in that the sum of the stripping steam (S) and reaction water (W) satisfies the relationship

REFERENCES:
patent: 4302595 (1981-11-01), Schoengen et al.
patent: 4578510 (1986-03-01), Doerr

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