Process for producing terephthalic acid

Details Process for producing terephthalic acid Process for producing terephthalic acid

1979-02-23

1980-07-08

Siegel, Alan

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

Organic compounds

Carboxylic acids and salts thereof

562421, C07C 5133

Patent

active

042118824

ABSTRACT:
Terephthalic acid is produced by oxidizing, in a liquid phase, p-tolualdehyde with a gas containing molecular oxygen, for example, air, in the presence of a catalyst consisting each of (1) a manganese compound, (2) a cobalt compound, (3) a bromine compound, and (4) at least one compound selected from the group consisting of chromium compounds, iron compounds, nickel compounds and compounds of metallic elements belonging to the lanthanide series, using a lower aliphatic monocarboxylic acid as a solvent.

REFERENCES:
patent: 3919305 (1975-11-01), Gay
patent: 3947494 (1976-03-01), Kuhlmann

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