萃取精馏分离高纯环戊烷工艺研究

Process research on separation of high purity cyclopentane by extraction distillation

研究了从富环戊烷芳烃抽余油中萃取分离高纯环戊烷的工艺。首先根据相平衡实验结果,选择了合适的萃取剂DMF,结合溶解度实验,确定了适宜的溶剂比。在此基础上,应用Aspen Plus软件进行了高纯环戊烷工艺模拟及设计,获得了最优的设计参数和操作条件。据此建设了4 000 t/a工业装置,装置运行结果表明,环戊烷质量分数大于99%、回收率大于95%,与普通精馏分离环戊烷相比,年增效1 016万元,经济效益显著。

The extraction distillation process that obtains high purity cyclopentane from rich cyclopentane aromatics raffinate oil is studied. Firstly,according to the results of phase equilibrium experiment,DMF is chosen as extractant.Combined with solubility experiment,an appropriate solvent ratio is determined. On this basis,the high purity cyclopentane separation process is simulated and designed by means of Aspen Plus software,and the optimal design parameters and operating conditions are obtained. A 4 000 tons/year industrial installation is built accordingly and operated. Operational results show that the yield of cyclopentane exceeds 95% with a purity of higher than 99%.Compared with the separation of cyclopentane by ordinary distillation,the annual increase in benefit reaches RMB 10. 16 million and the economic benefit is significant.