A new process on the preparation of 3-methyl-2-butene-1-ol

A new technology for the preparation of 3-methyl-2-butene-1-ol was investigated based on the hydrolysis of brominated isoamylene and distillation separation technology. By choosing a dipolar solvent,acetonitrile,for the hydrolysis the products showed the highest selectivity. And through further the optimization of experimental operating conditions,hydrolysis yield of 3-methyl-2-butene-1-ol reached 63.35% under the condition of the solvent amount v(acetonitrile)∶v(bromo-3-ene) = 1∶1,hydrolysis temperature 70℃,base amount n(Na OH)∶n(bromo-3-ene) = 1.2∶1 and reaction time 25 minutes. The pure 3-methyl-2-butene-1-ol was made of the feed liquid after hydrolysis by batch distillation operation,and the final total yield of 3-methyl-2-butene-1-ol reached 54%.