Process for producing z-2-methyl-2-butenoic acid

Details Process for producing z-2-methyl-2-butenoic acid Process for producing z-2-methyl-2-butenoic acid

C - Chemistry, Metallurgy

07

C

260/520.5

C07C 51/08 (2006.01) C07C 57/03 (2006.01)

Patent

CA 1273643

PROCESS FOR PRODUCING Z-2-METHYL-2-BUTENOIC ACID ABSTRACT OF THE DISCLOSURE A process for producing cis-2-methyl-2-butenoic acid, which process is preferably based on technical 2-methyl-2-butene nitrile and leads to pure products preferably without costly rectification. The technical nitrile is hydrolyzed by concentrated sulfuric acid at temperatures of up to 130°C and, following dilution of the sulfuric acid to about 50%, at temperatures of up to 130°C. It is treated by distilling and fractional crystallization.

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