In this paper,the heterogeneous azeotropic distillation was used to separate glycol and 1,2-propanediol with ethylbenzene,mixed xylene and cumene as azeotropic agent,respectively. Combining with the selectivity of azeotropic agent and the azeotropic point of azeotropic agent,suitable azeotropic agent was determined.

本文通过非均相共沸精馏的方法采用乙苯、混合二甲苯、异丙苯三种共沸剂进行实验,结合共沸剂的选择性和共沸物的共沸点来确定共沸剂。

Then studies the mechanisms of film evaporation and azeotropic distillation, in order to get the input variables.

随后，对薄膜蒸发和共沸精馏的机理进行了分析，并结合这两个装置的工艺流程，得到了影响输出的主要输入变量。

Then let the production dry, which apply four methods including nature drying, oven drying, azeotropic distillation drying, and vacuum distillation drying.

水解结束后得到的湿凝胶分别进行自然干燥，烘箱干燥，常压共沸蒸馏，真空加热蒸馏处理得到复合氢氧化物干凝胶。