Process for the preparation of an aqueous 3-chloro-2-sulfopropio

Details Process for the preparation of an aqueous 3-chloro-2-sulfopropio Process for the preparation of an aqueous 3-chloro-2-sulfopropio

1981-09-28

1984-03-20

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14302

Patent

active

044380470

ABSTRACT:
An improved and novel process for the preparation of an aqueous 3-chloro-2-sulfopropionic acid reagent involves the formation of a reaction mixture by adding acrylic acid to chlorosulfonic acid maintained at about 45.degree. to 130.degree. C., maintaining the mixture at about 60.degree.-130.degree. C. for about 2-6 hours, and adding sufficient water to the resulting anhydrous reagent to decompose the unreacted chlorosulfonic acid and dilute the reagent to a solids content of about 50-95%, preferably 70-90%. The reagent may be vacuum stripped to remove residual hydrochloric acid. Crystalline 3-chloro-2-sulfopropionic acid may be isolated from the aqueous reagent at a solids content above 80% and below 95%, preferably at 85%.

REFERENCES:
patent: 2895987 (1959-07-01), Hendry
A. LeBerre et al., No. 397-Acides .alpha.-sulfocarboxyliques et derives., Bull. Soc. Chim. Fr. (7-8), 2266, (1973).

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