偏三甲苯非临氢异构化制均三甲苯工艺的研究  

New Technology for Synthesis of Mesitylene from Pseudocumene

作　　者：张鹏飞[1] 王聪[1] 池红卫[1] 陈燕杰[1] 

机构地区：[1]天津大学化工学院化学工程研究所,天津300072

出　　处：《石油化工》2005年第5期441-444,共4页Petrochemical Technology

摘　　要：在M-2型复合丝光沸石催化剂上,研究了偏三甲苯液相非临氢异构化合成均三甲苯的工艺。考察了反应温度、反应压力、液态空速等因素对反应的影响,得出最佳的反应条件:反应温度310～320℃,反应压力1.5～2.0MPa,液态空速1.0～1.5h-1;在此条件下,偏三甲苯的单程转化率可达39%,均三甲苯的选择性可达66.29%。用精密精馏方法分离得到高纯度均三甲苯(质量分数大于等于98.5%),回收偏三甲苯循环使用。该工艺解决了邻甲乙苯累积的问题,满足了工业化的要求。A new technology for synthesis of mesitylene from pseudocumene by liquid non-hydroisomerization on M-2 catalyst was studied. Effects of reaction temperature, pressure and liquid hourly space velocity (LHSV) on catalyst performance were investigated. Product mesitylene was purified by using precise fractionation, its mass fraction could reach more than 98.5%. Unreacted pseudocumene was recycled, and o-ethyltoluene was subjected to disproportionation. Optimal reaction conditions were: temperature 310-320°C, pressure 1.5-2.0 MPa and LHSV 1.0-1.5 h-1. Under these conditions, conversion per pass of pseudocumene and selectivity of mesitylene could reach 39% and 66.29% respectively. The technology solved ethyltoluene accumulation problem and satisfied requirements of industrial production.

关 键 词：均三甲苯 偏三甲苯 液相异构化 催化剂 

分 类 号：TQ246.31[化学工程—有机化工]