Process for producing sulphonic acids

Details Process for producing sulphonic acids Process for producing sulphonic acids

C - Chemistry, Metallurgy

07

C

260/502.5

C07C 309/15 (2006.01)

Patent

CA 1254583

ABSTRACT OF THE DISCLOSURE Acrylamido-alkane sulphonic acids of the following formula are provided: Image wherein R3 and R4 are independently selected from C1-8 alkyl, aryl and aralkyl having from 6 to 12 carbon atoms in total, R1 and R2 are selected from the same values as R3 and R4 and hydroges, and R5 is hydrogen or C1-6 alkyl from a nitrile of the formula H2C = C(R5)CN. Thus, 2-acrylamido 2-methyl propane sulphonic acid and other acrylamido-alkane sulphonic acids are made by reacting a compound such as t-butanol, t-butyl acetate or t-butyl methyl ether with a sulphonating agent in the absence of water, and then with a nitrile and water. These sulphonic acids are suitable for use as starting materials in the production of water-soluble anionic polymers.

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