Abstract:

Batch extractive distillation for ether-isopropanol-water mixture was studied by using glycol as the extractant. The influence of solvent feeding rate，reflux ratio and solvent feeding temperature was investigated. Under the optimal operation conditions：solvent feeding location at the column top，reflux ratio was 2，solvent feeding rate 11.4g/min in the step of isopropyl ether collection and 8.08 g/min in the step of isopropanol collection，solvent feeding temperature 70.0 ℃ in the step of isopropyl ether collection and 100.0 ℃ in the step of isopropanol collection，the mass fraction of isopropyl ether at the column top could reach 0.95 and its yield was 0.985，the mass fraction of isopropanol at the column top could reach 0.97 and its yield was 0.968.

摘要：

以乙二醇为溶剂，对异丙醚-异丙醇-水三元共沸物采用间歇萃取精馏进行分离研究，考察了在溶剂不同进料速率、回流比、进料温度等条件下的分离情况，找到了实验条件下分离此三元共沸物的最佳条件。最佳条件为：溶剂进料位置为塔顶，回流比为2，溶剂进料速率在分离异丙醚和分离异丙醇两个阶段分别为11.4 g/min和8.08 g/min，溶剂进料温度分别为70.0 ℃和100.0 ℃。在此条件下，异丙醚产品质量分数可达0.95，收率为0.985；异丙醇产品质量分数可达0.97，收率为0.968。