从裂解C_5中分离聚合级异戊二烯工艺的改进  

Improvement of Process for Separating Polymer-Grade Isoprene from Cracking C_5

作　　者：冯海强[1] 朱跃辉[1] 高继东[1] 赵开径[1] 鲁耘[1] 胡竞民[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《石油化工》2011年第6期644-649,共6页Petrochemical Technology

摘　　要：提出了采用反应精馏和共沸精馏替代第二萃取精馏单元从裂解C5中分离聚合级异戊二烯工艺的改进工艺,并采用Aspen Plus流程模拟软件对该工艺进行了模拟计算。计算结果表明,在优化的反应精馏塔操作条件(回流比17,塔顶压力101kPa,塔压降8.5kPa)下,塔顶异戊二烯中环戊二烯的质量分数小于1.00×10-6;在优化的共沸精馏塔操作条件(回流比85,塔顶压力152kPa,塔压降10kPa,进料/异戊烷质量比125)下,塔釜可得到聚合级异戊二烯。改进的工艺具有流程短、操作和建设费用低的优点。An improved process with reactive distillation column and azeotropic distillation column instead of the second extractive distillation unit for separating polymer-grade isoprene from cracking C5 fraction was proposed, and was simulated by using Aspen Plus software. According to the results, under the optimal operation parameters for the reactive distillation column： reflux ratio 17, overhead pressure 101 kPa and column pressure drop 8.5 kPa, the mass fraction of cyclopentadiene in isoprene at the overhead was less than 1. 00× 10^-6. And under the optimal operation parameters for the azeotropic distillation column： reflux ratio 85, overhead pressure 152 kPa, column pressure drop 10 kPa and feed/isopentane mass ratio 125, polymer-grade isoprene could be obtained at the bottom. The improved process has the advantage of lower costs in both the construction and the operation.

关 键 词：裂解C5 反应精馏 共沸精馏 异戊二烯 模拟 ASPEN PLUS软件 

分 类 号：TQ423[化学工程]