【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。更多还原

【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.更多还原