Process for producing aromatic carboxylic acid

Details Process for producing aromatic carboxylic acid Process for producing aromatic carboxylic acid

1998-08-25

1999-03-09

Barts, Samuel

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5116

Patent

active

058803130

ABSTRACT:
A process for continuously producing an aromatic carboxylic acid comprising oxidizing an aromatic compound substituted with alkyl groups with molecular oxygen gas in the liquid phase in a solvent containing a lower aliphatic carboxylic acid in the presence of a catalyst comprising heavy metal compounds and a bromine compound, wherein a mother liquor which is obtained after removal of crystals from a reaction liquid of the liquid phase oxidation and contains heavy metal ions and bromine ion as catalyst components is brought into contact with a chelate resin of an anion exchange type to recover the catalyst components.
The catalyst components are efficiently recovered, and auxiliary agents in an amount exceeding the equivalent amount and excessive labor are not necessary.

REFERENCES:
patent: 4162991 (1979-07-01), Jones
patent: 4317919 (1982-03-01), Jones et al.
patent: 5731466 (1998-03-01), Kida

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