Water → Benzoic acid, 3-sulfo-

Participants

Reaction Conditions

Reaction Steps

300 g of 3-(chlorosulfonyl)benzoic acid containing 38.8% of water (corresponding to 183.6 g (0.83 mol) of 100% chlorosulfonylbenzoic acid) are admixed with 100 g of water and heated to 100° C. for 1 hour. Then 500 g of toluene are added dropwise over 1 hour and a total of 164 ml of water distilled off azeotropically with toluene. The reaction mixture is cooled and the precipitated product filtered off with suction. After drying at 100° C./100 torr (13.16 kPa) 163.5 g of 3-sulfobenzoic acid are obtained, the purity determined by titration being 98.2%; this corresponds to a yield of 95.4%.

Provenance & Evidence