| 摘要 |
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 DEG C. and, following dilution of the sulfuric acid to about 50%, at temperatures of up to 130 DEG C. It is treated by distilling and fractional crystallization.
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