申请人:The Nutrasweet Company
公开号:US20030229254A1
公开(公告)日:2003-12-11
3,3-Dimethylbutanal is prepared from 3,3-dimethylbutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and a mineral acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hydrolysis step is effectively carried out by reactive distillation. Alternatively, 3,3-dimethylbutanal is prepared from 3,3-dimethylbutanol obtained by reduction of the corresponding carboxylic acid or 1,2-epoxy-3,3-dimethylbutane, or by hydrolysis of 1-halo-3,3-dimethylbutane. Fixed bed gas phase and stirred tank liquid phase processes are provided for converting 3,3-dimethylbutanol to 3,3-dimethylbutanal by catalytic dehydrogenation.
3,3-二甲基丁醛由 3,3-二甲基丁醇制备而成。中间体 3,3-二甲基丁醇是通过乙烯、异丙烯和矿物酸反应生成 3,3-二甲基丁酯,然后水解成醇。水解步骤可通过反应蒸馏有效进行。另外,也可以通过还原相应的羧酸或 1,2-环氧-3,3-二甲基丁烷,或水解 1-卤代-3,3-二甲基丁烷,从 3,3-二甲基丁醇中制备 3,3-二甲基丁醛。固定床气相法和搅拌罐液相法通过催化脱氢将 3,3-二甲基丁醇转化为 3,3-二甲基丁醛。