反应详情

250 g of 3-(chlorosulfonyl)benzoic acid containing 35.9% of water (corresponding to 160.2 g (0.73 mol) of 100% chlorosulfonylbenzoic acid) are admixed with 86 g of water and 500 g of xylene and heated in a water separator. A total of 171 ml of water are expelled. The reaction mixture is cooled and the precipitated product filtered off with suction. After drying at 100° C./100 torr (13.16 kPa) 144.3 g of 3-sulfobenzoic acid are obtained, the purity determined by titration being 97.5%; this corresponds to a yield of 95.6%.

1. temperatureThe reaction mixture is cooled
2. filtrationthe precipitated product filtered off with suction
3. dry with materialAfter drying at 100° C./100 torr (13.16 kPa) 144.3 g of 3-sulfobenzoic acid
4. customare obtained