改性HZSM-5分子筛上苯酚与甲醇的烷基化反应  

Phenol Methylation with Methanol over Modified HZSM-5

作　　者：韩森[1] 张悝[1] 张富英[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]化学与化工国家重点实验室,天津300072

出　　处：《化学工业与工程》2003年第5期282-285,302,共5页Chemical Industry and Engineering

摘　　要：在反应温度为673K,苯酚与甲醇的摩尔比为1:1,重时空速(WHSV)为0 5h-1的反应条件下,研究了改性HZSM-5分子筛上苯酚与甲醇烷基化反应的反应规律。用酸性氧化物(P2O5),碱性氧化物(MgO),中性氧化物(Sb2O3)对HZSM-5改性都可以提高苯酚甲基化反应产物芳香醚(Anisole+methylAnisole)的选择性,降低甲酚和二甲酚的选择性。随着氧化物负载量的增加,邻-甲酚的选择性增加。适度的氧化物改性可以提高对-甲酚的选择性,改性效果:Sb2o3>P2O5>MgO。The reaction of phenol methylation with methanol over modified HZSM-5 with P2O5,MgO,Sb2O3 was investigated at the reaction temperature of 673K,phenol/methanol(molar ratio) of 1:1,and WHSV of 05 h-1.The modification of HZSM-5 with P2O5,MgO,and Sb2O3 could increase the selectivities to anisole and methylanisole.However,it decreases the selectivities to Xylenol and Cresol in the reaction.Increasing the amount of those oxides could enhance the selectivity to o-Cresol.Moderate impregnation of those oxides could improve the selectivity to p-Cresol in the reaction and the effects had the sequence:Sb2O3>P2O5>MgO.

关 键 词：HZSM-5沸石 苯酚 甲基化 

分 类 号：TQ031.8[化学工程]