Process for the production of saccharine

Details Process for the production of saccharine Process for the production of saccharine

1977-12-19

1979-03-20

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260304A, C07D27764

Patent

active

041453492

ABSTRACT:
This invention relates to a process of producing saccharin by reacting o-chlorobenzoic acid with sodium sulfite, esterifying it with methanol, and then treating the o-sulfobenzoic acid methyl ester with thionyl chloride as a chlorinating agent, the improvement comprising, in combination, salting out the whole of the o-sulphobenzoic acid from the solution of its salt in the form of potassium o-carboxy benzene sulfinate by the addition of hydrochloric acid and potassium chloride, removing the inorganic salt form prior to chlorination, and using no more than a two fold excess of chlorinating agent.

REFERENCES:
patent: 4076721 (1978-02-01), Loike
Hagyard, T. and W. Meachen (Reporters), B10S Trip #3110, "Manufacture of Saccharin and its Intermediates," 1947.

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