Process for preparing diphenyl sulfonetetracarboxylic acid

Details Process for preparing diphenyl sulfonetetracarboxylic acid Process for preparing diphenyl sulfonetetracarboxylic acid

1990-09-20

1992-02-25

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562417, 562427, C07C 51265

Patent

active

050915649

ABSTRACT:
Disclosed is a process for preparing a diphenyl sulfonetetracarboxylic acid, the process comprising oxidizing a tetramethyldiphenyl sulfone with oxygen or an oxygen-containing gas in an aliphatic monocarboxylic acid having 2 to 10 carbon atoms in the presence of a catalyst consisting essentially of a cobalt component, a manganese component and a bromine compound wherein the weight ratio of manganese metal to cobalt metal is in the range of approximately 0.01 to 0.5.

REFERENCES:
patent: 3139452 (1964-06-01), Hay
patent: 3504022 (1970-03-01), Bresson
patent: 4827025 (1989-05-01), Shiraki et al.

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