Process for purifying saccharin

Details Process for purifying saccharin Process for purifying saccharin

1975-06-10

1976-10-26

Lutter, Frank W.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

426429, 426548, C07D27506

Patent

active

039883442

ABSTRACT:
A process for purifying saccharin comprising the steps of adding butyl acetate or a mixture of butyl acetate and ethyl acetate as an extracting solvent to an aqueous solution of water-soluble metal salt or ammonium salt of saccharin to remove organic impurities from the saccharin by extraction, the volume of ethyl acetate not exceeding that of butyl acetate, concentrating and cooling the resulting aqueous layer to precipitate crystals having an organic impurity content of not higher than 120 p.p.m. and recrystallizing the crystals from water to obtain saccharin having an organic impurity content of not higher than 10 p.p.m.

REFERENCES:
Abstract--"Removing o- and p-toluenesulfonamide and p-sulfamoylbenzoic acid from Saccharin", 54:15319h, 1959.
Abstract--"Impurities in Saccharin and Bladder Cancer", 79:62421c, 1973.
Abstract--"A Rapid Method for the Estimation of Impurities in Saccharin and Sodium Saccharin", 66:22256c.

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