Abstract: 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, what's more, it's easy to achieve industrialization open up.

Key words: Sdium , Potassium carbonate , Dispersing agent , 5-o-Tolyl -2-pentene

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2.5h,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。

关键词: 钠 , 碳酸钾 , 分散剂 , 5-苯甲基-2-戊烯