三段减压连续精馏草酸酯催化加氢制乙二醇产物的研究

Study on the separation of products of hydrogenation oxalate ester to ethylene glycol by three step vacuum batch distillation

采用了三段连续减压精馏的方法进行分离纯化草酸酯催化加氢产物中乙二醇,精馏后乙二醇纯度达到99.9%。产物中乙醇含量较高,因此需回收利用,通过提馏后回收的乙醇纯度达到99%。实验考查了分离工艺条件,为工业化分离设计提供基本依据。

The product of hydrogenation oxalate ester to ethylene glycol was separated and purified by three step vacuum batch distillation.99.9% purity ethylene glycol was obtained after rectifying.In the product,the concentration of ethanol was high,so it must be recycled.The ethanol purity can reach higher than 99% by distillation.The operation condition was also investigated,which can provide fundamental basis for the industrialization separation and design.