反应详情

温度

100 °C

273.6 g of 3-(chlorosulfonyl)benzoic acid containing 28.6% water (corresponding to 195.3 g (0.89 mol) of 100% chlorosulfonylbenzoic acid) are admixed with 50 g of water and 500 g of chlorobenzene and heated in a water separator. A total of 106 ml of water are expelled. After cooling the reaction mixture to 100° C., 108 g (0.89 mol) of 33% strength sodium hydroxide solution are added dropwise over 30 minutes. Subsequently a further 90 ml of water are expelled. After cooling, the precipitated product is filtered off with suction. After drying at 100° C./100 torr (13.16 kPa) 190.4 g of sodium 3-sulfobenzoate are obtained, the purity determined by titration being 97.3%; this corresponds to a yield of 93.3%.

1. temperatureAfter cooling
2. filtrationthe precipitated product is filtered off with suction
3. dry with materialAfter drying at 100° C./100 torr (13.16 kPa) 190.4 g of sodium 3-sulfobenzoate
4. customare obtained