Water → Benzoic acid, 3-sulfo-

Participants

Reaction Conditions

Reaction Steps

300 g of 3-(chlorosulfonyl)benzoic acid containing 38.8% water (corresponding to 183.6 g (0.83 mol) of 100% chlorosulfonylbenzoic acid) are admixed with 150 g of water and heated at 100° C. for 1 hour. Then 600 g of xylene are added dropwise over 1 hour and a total of 260 ml of water are azeotropically distilled off with xylene. The reaction mixture is cooled and the precipitate is filtered off with suction. After drying at 100° C./100 torr (13.16 kPa) 164.7 g of 3-sulfobenzoic acid are obtained, the purity determined by titration being 97.7%; this corresponds to a yield of 95.6%.

Provenance & Evidence