摘要
通过一个常规间歇萃取精馏实验装置,考察三元混合溶剂(NMP+DMF+DMSO)在不同回流比及萃取溶剂加入速率情况下对分离苯-环己烷共沸体系的影响.实验结果表明,三元混合溶剂能够解决单一溶剂存在的选择性与溶解性相矛盾的问题,且三元混和溶剂存在最佳组成,综合性能优于单一溶剂;随溶剂加入速率和操作回流比的增加,产品产量逐渐提高,尤其是混合溶剂间歇萃取精馏技术与简单溶剂间歇萃取精馏技术相比并不复杂.
A regular batch extractive distillation process for separating close boiling and azeotropic mixtures was studied.The effects of mixed solvents（NMP＋DMF＋DMSO） and operating parameters,such as reflux ratio and solvent feed rate,on the separation process were investigated.The results show that binary mixed solvents are superior to single solvent for separating benzene-cyclohexane by regular batch extractive distillation.With the increase of the reflux ratio and the solvent feed rate,the amount of products was increased in the process of regular batch extractive distillation.In addition,the batch extractive distillation with mixed solvent is not more complicated when compared with batch extractive distillation with single solvent.
出处
《沈阳化工学院学报》
2009年第3期217-221,共5页
Journal of Shenyang Institute of Chemical Technolgy
关键词
间歇萃取精馏
苯
环己烷
混合溶剂
batch extractive distillation
benzene
cyclohexane
mixed solvents
