摘要
制备了改性的ｘ型和ｘ／ＺＳＭ－５型沸石催化剂，并对其进行了评价和ＴＰＤ、ＥＳＣＡ表征，将实验结果进行了关联。结果表明，采用ＫＯＨ，Ｈ＿３ＢＯ＿３和碱土金属化合物等作为改性剂，可以调变沸石催化剂的酸碱中心，其中碱酸密度比为０．５３９的ＫＸ（Ｂ＿３）·ＫＺＳＭ－５（Ｃａ）催化剂，能显著提高甲苯、甲醇侧链烷基化制取苯乙烯反应的选择性和收率。井根据对实验结果的分析，初步探讨了甲苯、甲醇侧链烷基化反应的机理。
KX(Ca,B)was used to accelerate side chain alkylation of toluene withmethanol.It has been deduced that this reaction requires appropriate synergism of bothacidic and basic active sites in catalysts. By characterization and evaluation of a series of bi-component bizeolite catalysts compounded by KX,modified with different amount H_3BO_3 andKZSM-5 ,modified with alkali earth metals,it has been further shown that above-men-tioned idea is correct.In addition,the mechanism of side chain alkylation of toluene withmethanol was studied.
出处
《燃料化学学报》
CSCD
北大核心
1995年第1期18-22,共5页
Journal of Fuel Chemistry and Technology
基金
山西省自然科学基金
关键词
沸石
烷基化
甲苯
甲醇
催化剂
zeolite
side-chain alkylation
reaction mechanism
toluene
methanol
