Na/K_2CO_3合成5-苯甲基-2-戊烯  

Synthesis of 5-o-Tolyl-2-Pentene With Na/K_2CO_3

作　　者：杨锦祥[1] 郑嘉明[1] 张水英[1] 白云飞[1] 

机构地区：[1]天津大学绿色合成与转化教育部重点实验室,天津300072

出　　处：《石油化工高等学校学报》2007年第1期60-62,共3页Journal of Petrochemical Universities

摘　　要：以Na为催化剂,K2CO3作为分散剂,邻二甲苯和1,3-丁二烯为原料合成5-苯甲基-2-戊烯(OTP),考察了催化剂用量、分散剂用量、反应温度、反应时间和原料配比等因素对烯基化反应的影响,并得到了最佳工艺条件,即n(邻二甲苯)/n(1,3-丁二烯)为5∶1,反应温度175℃,反应时间2.5 h,催化剂质量分数为0.25%,分散剂与催化剂质量比16∶1,在最佳工艺条件下OTP的收率达到71.2%。该工艺操作简单,反应时间短,易于实现工业化。5-o-tolyl -2-pentene（OTP） was prepared by o-xylene and 1,3- butadiene under sodium as catalyst and potassium carbonate as dispersing agent . The effects of catalyst dosage, mass ratio of dispersing agent to catalyst, reaction temperature, reaction time and molar ratio of o-xylene to 1,3-butadiene were investigated. The best technical parameters were obtained ： the molar ratio of o- xylene to 1,3- butadiene is 5 ： 1, reaction temperature is 175 ℃, reaction time is 2.5 h, mass fraction of catalyst is 0.25%, mass ratio of dispersing agent to catalyst is 16 ： 1. The yield of OTP is 71.2% under the best technologic conditions. The technology has a series of advantages, for example, the process is simple, the reaction time is short, whafs more, it＇s easy to achieve industrialization open up.

关 键 词：钠 碳酸钾 分散剂 5-苯甲基-2-戊烯 

分 类 号：TQ241[化学工程—有机化工] TQ031.2