均三甲苯合成新工艺研究  

Study on A New Technology of Synthesis of 1,3,5-Trimethylbenzene

作　　者：张雪梅[1] 张卫江[1] 朱璟[1] 王凤东[1] 简春贵[2] 

机构地区：[1]天津大学化学工程研究所,天津300072 [2]天津天大天久科技股份有限公司,天津300072

出　　处：《化学工程》2002年第5期70-73,共4页Chemical Engineering(China)

摘　　要：研究了以廉价的混合二甲苯和一氯甲烷为原料、液相法合成均三甲苯的新工艺 ,讨论了各种工艺条件对反应的影响 ,并找到了最佳工艺条件 ,即混合二甲苯 10 0 0mL ,反应温度 12 0— 130℃ ,催化剂用量5 % ,烷基化剂流量 0 .0 6m3 /h ,搅拌速度 40 0r/min ,反应时间 5h ,通入氯甲烷 3h。在此条件下反应液中均三甲苯的含量达到 14%左右。该工艺具有原料价廉易得、产品含量较高的特点 ,满足工业化的要求 。To improve the current production techniques for 1,3,5-trimethylbenzene and develop a practical process for industrial production, a new technology of synthesis of 1,3,5-trimethylbenzene from the cheap raw materials xylene and methyl chloride were studied. And the effects of different reaction conditions on the process were discussed. As a result, the best technological conditions are offered: volume of xylene 1000 mL, reaction temperature 120-130℃, ratio of catalyst to xylene 5%, flow rate of methyl chloride 0.06m 3/h, agitation rate 400r/min, reaction time 5h, and duration of addition of methyl chloride 3h. Under the above conditions the content of 1,3,5-trimethylbenzene in reaction liquid reaches 14% or so. The process makes features of cheap raw material and high content of the product in reaction liquid. Therefore, it can meet the requirements of industrial production and has a wide prospect.

关 键 词：均三甲苯 合成 新工艺 研究 二甲苯 一氯甲烷 

分 类 号：TQ241.1[化学工程—有机化工]