Process for producing high-quality terephthalic acid suitable fo

Details Process for producing high-quality terephthalic acid suitable fo Process for producing high-quality terephthalic acid suitable fo

1978-09-20

1980-02-19

Siegel, Alan

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

Organic compounds

Carboxylic acids and salts thereof

562421, C07C 5142

Patent

active

041896033

ABSTRACT:
A process for producing terephthalic acid of high quality suitable for use in direct polymerization comprising oxidizing a para-dialkylbenzene and/or an oxidized intermediate thereof in the liquid phase with molecular oxygen or a molecular oxygen-containing gas in the presence of an oxidation catalyst containing a heavy metal in a lower aliphatic carboxylic acid solvent, the reaction being carried out in the presence of a specified amount of a phenol. Polyesters prepared from the resulting terephthalic acid have good color.

REFERENCES:
patent: 3284493 (1966-11-01), Chibnik

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