苯酚甲醇气相催化甲基化合成邻甲酚和2,6-二甲酚  

Preparation of o Cresol and 2,6 Dimethyl Phenol by Phenol Methylation with Methanol

作　　者：刘智凌[1] 王晓光[1] 黄湘云[1] 熊前政[1] 朱孟兰[1] 刘云林[1] 

机构地区：[1]湖南化工研究院精细化工所

出　　处：《石油化工》1997年第5期282-286,共5页Petrochemical Technology

基　　金："八五"国家重点科技攻关项目

摘　　要：筛选苯酚甲醇气相催化甲基化合成邻甲酚和２，６－二甲酚的催化剂，以Ｖ２Ｏ５－Ｆｅ２Ｏ３系催化剂性能最佳，并通过添加助催化剂ＣｕＯ、ＰｂＯ２、Ｃｒ２Ｏ３和ＣｅＯ２等进行性能调变，进行工艺条件试验和寿命运转，反应温度３００～３５０℃，原料配比苯酚甲醇水为１４３（摩尔比）。空速２５０ｈ－１，苯酚转化率７０％，邻甲酚收率５０％，催化剂寿命＞８００ｈ。This article presents a process for selecting a catalyst for preparing o cresol and 2,6 dimethyl phenol by phenol methylation with methanol.It is found that V 2O 5 is the better catalyst and the addition of proper amount of Cu,PbO 2,Cr 2O 3,CeO 2 can improve their activities.The effect of reaction conditions and the life of catalyst are also studied.Under the suitable reaction conditions of 300～350℃,PhOH∶MeOH∶H 2O=1∶4∶3(mol),the conversion of phenol reaches 70%,and yield of o cresol 50%,and the life of catalyst is >800h. o cresol,2,6 dimethyl phenol,phenol,methylationo cresol 50%,and the life of catalyst is >800h.

关 键 词：邻甲酚 二甲酚 苯酚 甲基化 

分 类 号：TQ243.11[化学工程—有机化工]