反应精馏生产氯乙醇的新工艺研究

针对氯乙醇传统生产工艺存在的缺陷,引入反应精馏技术,以乙二醇和工业盐酸为原料,通过探讨选择己二酸为催化剂制备了高纯度氯乙醇。通过试验对连续反应精馏生产氯乙醇的工艺过程进行了系统的研究,并采用气相色谱对产物中氯乙醇的含量进行了分析。实验证明,当塔釜温度为115～120℃,回流比0.5,催化剂己二酸用量为乙二醇的5%(摩尔分数),进料比m(乙二醇)∶m(盐酸)∶m(水)=2.3∶3.8∶1时,所得氯乙醇的纯度可达到42%。

New Technology Process of 2-Chloroethanol Using Reactive Distillation

The process for continuous production of 2-chloroethanol by reactive distillation was studied using experiment.In the process,the catalyst was hexanedioic acid with gas chromatography measured the product purity.It has been found that the obtained optimum process parameters were oil bathing temperature ranged from 115 to 120 ℃,reflux ratio 0.5,the amount of catalysts 5%(mole ratio)feeding ratio of m(ethylene glycol):m(hydrochloric acid):m(water)=2.3:3.8:1.Under the conditions,the purity of 2-chloroethanol reached 42%.