中文摘要：

乙醛一环己烷反应萃取体系能够有效分离发酵液中的2，3-丁二醇。文章重点研究了2，3-丁二醇一乙醛反应萃取液的连续水解精馏工艺，为工业化生产提供理论基础。水解精馏使用阳离子交换树脂HZ732为水解催化剂，以2，4，5-三甲基．1，3-二氧戊环（2，3-丁二醇．乙醛缩醛）水解率为指标，考察了反应段温度、反应段级数、进料速度、进料油水比（2，4，5-三甲基-1，3-二氧戊环和水摩尔比）和回流比的影响。通过实验得到优化水解精馏工艺条件为：反应段平均温度90℃，反应段理论板数为20，进料油水比为0．6，进料速度0．2h-1。在该条件下2，4，5-三甲基-1，3·二氧戊环水解率为73％，未水解2，4，5-三甲基-1，3-二氧戊环被回收。水解液经精馏得到2，3-丁二醇产品，纯度（质量分数）〉96％，总收率t〉93％。开发了连续水解精馏工艺，为整个工艺工业化实践提供了参考。

英文摘要：

Acetaldehyde-cyclohexane reactive extraction system can effectively separate 2, 3-butanediol from fermentation broth. The continuous hydrolyzing process of reactive-extraction liquid was studied. Cationic ion- exchange resin HZ732 was used as catalyst. The hydrolysis rate of 2,4,5-trimethyl-1,3-dioxolane （2,3-butanediol- acetaldehyde-acetal） was used as index. The operation conditions were investigated, which include reaction temperature, reaction stage number, feeding velocity, feed mole ratio of 2,4,5-trimethyl-1,3-dioxolane to water and reflux ratio. The appropriate operation conditions obtained are as follows ： reaction temperature is 90 ~C, reaction stages are 20, mole ratio of 2,4,5-trimethyl-1,3-dioxolane to water is 0.6, and feed velocity is 0.2 h - ~. Under above conditions, more than 73% of 2,4,5-trimethyl-1,3-dioxolane can be hydrolyzed to form 2,3-butanediol. Finally, distillation was used to purify 2,3-butanediol and recover the unhydrolyzed 2,4,5-trimethyl-1,3-dioxolane. The overall yield of 2,3-butanediol can be I〉93% with purity （mass fraction） of more than 96%. The continuous hydrolyzing process can improve the hydrolysis rate of 2,4,5-trimethyl -1,3-dioxolane and can be used for industrial application.