Process for preparing 2-carboxy-5-nitrobenzenesulfonic acid and

Details Process for preparing 2-carboxy-5-nitrobenzenesulfonic acid and Process for preparing 2-carboxy-5-nitrobenzenesulfonic acid and

1998-08-17

2000-10-03

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

562430, C07C 1516, C07C31504

Patent

active

061275727

ABSTRACT:
The invention is directed to a simple process for the preparation of the product 2-carboxy-5-nitrobenzenesulfonic acid (=4-nitro-2-sulfo-benzoic acid) or a salt thereof. The product can be prepared by the oxidation reaction of 2-methyl-5-nitrobenzenesulfonic acid with metal hypochlorites in the presence of metal bases from the group consisting of hydroxides and carbonates, essentially with the exclusion of heavy metal salts.

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