Process for producing terephthalic acid

Details Process for producing terephthalic acid Process for producing terephthalic acid

1976-09-01

1981-01-13

Siegel, Alan

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5116

Patent

active

042450780

ABSTRACT:
Terephthalic acid having a purity of 99% or more can be produced in a yield of 95% by mole or more by oxidizing p-tolualdehyde or a mixture of p-tolualdehyde and p-toluic acid with molecular oxygen in a solvent in the presence of a cobalt salt catalyst under the conditions that (1) a Co/solvent ratio is 0.05 to 0.70% by weight and (2) a toluic acid/Co ratio is 0.1 to 3.0 moles/gram atom, without using either a promoter or an oxidation accelerator.

REFERENCES:
patent: 3637829 (1972-01-01), Kerr
patent: 3683017 (1972-08-01), Ager

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