5-苯甲基-2-戊烯合成新工艺  

A Novel Technology for The Synthesis of 5-o-Tolyl-2-Pentene

作　　者：汪雷铮[1] 王颖男[1] 郑嘉明[1] 杨锦详[1] 张水英[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：《化学反应工程与工艺》2006年第1期69-73,共5页Chemical Reaction Engineering and Technology

摘　　要：采用超声波技术激活钾钠液态低共熔物作为邻二甲苯与1,3-丁二烯烯基化反应合成5-苯甲基-2-戊烯(OTP)的催化剂,考察了催化剂预处理参数、反应温度、原料配比、催化剂用量以及加入助剂用量等因素对催化活性的影响。结果表明,以超声波预处理技术制备钾钠低共熔物催化剂有效提高了催化性能。当超声波频率30 kHz,功率80 W下激活3 h,反应温度150°C,邻二甲苯与1,3-丁二烯原料配比5∶1,原料与催化剂质量比400∶1,可获得最好的催化活性,1,3-丁二烯转化率达到83.16%。当加入助剂四甲基乙二胺(TMEDA)的质量百分数为1%时,可以进一步促进烯基化反应,1,3-丁二烯转化率达到89.4%。Effects of pretreatment of catalysis, reaction temperature, the ratio of the reactants, the substrate-catalyst ratio and the content of the promoter on the reaction properties of NaK catalysts has been studied in a wide range. The sonochemical pretreatment of the NaK eutectic mixture catalyst resulted in excellent 1, 3-butadiene conversion （up to 83.16%）. It was found experimentally that the optimal parameters are ultrasound frequency 30 kHz, insonation time 3 hours, sonication power 80 W, reaction temperature 150 ℃, the ratio of the reactants 5 ： 1, the substrate-catalyst ratio 400 ： 1. The introduction of N, N, N＇, N＇-tetramethylethylenediamine （TMEDA） with the optimum content of 1% can give rise to a further considerable of 1, 3-butadiene conversion （uo to 89.4%）.

关 键 词：钾钠合金 超声波 5-苯甲基-2-戊烯 邻二甲苯 1 3-丁二烯 

分 类 号：TQ221.22[化学工程—有机化工] O623.1[理学—有机化学]