异戊二烯在裂解碳五馏分分离过程中损失的原因分析  

STUDY ON THE CAUSES OF ISOPRENE LOSS DURING THE SEPARATION OF CRACKED C_5 FRACTIONS

作　　者：钟晓图[1] 苏萍[1] 杨屹[1] 李东风[2] 

机构地区：[1]北京化工大学理学院,北京100029 [2]中国石化北京化工研究院

出　　处：《石油炼制与化工》2011年第11期52-56,共5页Petroleum Processing and Petrochemicals

摘　　要：采用封管合成的方法,对碳五馏分热二聚过程中环戊二烯(CPD)和异戊二烯(IP)的共二聚物及自二聚物进行定性和定量分析,从产物追溯反应物的变化,探讨IP在热二聚过程中的损失原因。结果显示:CPD与IP的共二聚是导致IP损失的主要原因;而在高温度段(110～130℃),IP的自二聚反应是导致高温段IP转化率增加的主要原因。综合上述两个原因,在进行二聚反应装置的设计时应尽量避免CPD与IP的接触,反应应在较低温度和较短停留时间下进行,110℃以下较为适宜。Under various reaction temperatures and reaction time, the behaviors of isoprene （IP）, 1,3-pentadiene （PD） and cyclopentadiene （CPD） during thermal dimerization of steam cracking Cs were studied by seal-tube method. The produced codimers （CPD with IP and CPD with PD） and self-dimers were analyzed to investigate the causes of IP loss during thermal dimerization. Results showed that the co-dimerization between CPD and IP was the main cause of IP loss,besides, the self-dimerization of IP at high temperature range （110--130 ~C） was another cause for the increase of IP conversion under high temperature. Therefore,in the design of process and thermal dimerization reactor, to eliminate the contact of CPD and IP is essential,as well as processing under lower temperature （below 110 ℃） and relatively short resident time.

关 键 词：碳五馏分 热二聚 异戊二烯 共二聚物 环戊二烯 

分 类 号：TQ202[化学工程—有机化工]