摘要
采用NaY分子筛为原料,经离子交换制得HY分子筛,对其进行焙烧改性,用于催化以苯和氯化苄为原料合成二苯甲烷烷基化反应研究。考察HY分子筛焙烧温度及用量、反应温度、反应时间和原料比对反应的影响。结果表明,焙烧温度800℃,催化剂用量为氯化苄质量的10%,反应温度140℃,反应时间1 h和原料比n(苯)∶n(氯化苄)=10∶1的条件下,氯化苄转化98.32%,二苯甲烷选择性80.46%。HY分子筛表现出良好的催化活性和选择性。
The HY zeolite was obtained from NaY zeolite via ion exchange and high temperature calcinations and used as catalyst for alkylation between benzene and benzyl chloride in a batch-wise reactor.Effects of calcination temperature of HY zeolite,dosage of catalyst,reaction temperature,reaction time and proportion of raw materials were investigated.The optimum condition were obtained as follows,calcination temperature was 800℃,reaction temperature was 140℃,catalyst dosage was 10%mass fraction of benzyl chloride,reaction time was 1 h,n(benzene)∶n(benzyl chloride)=10∶1.Under the optimum condition,benzyl chloride conversion was 98.32%,and diphenylmethane selectivity was 80.46%.The HY zeolite catalyst exhibited higher catalytic activity and selectivity.
作者
段大少
华燕青
Duan Dashao;Hua Yanqing(Shaanxi Liquefied Natural Gas Invest.&Dev Co.,Ltd.,Xianyang 712000,Shaanxi,China;Yangling Vocational&Technology College,Yangling 712100,Shaanxi,China)
出处
《工业催化》
CAS
2023年第9期71-74,共4页
Industrial Catalysis
基金
杨凌职业技术学院项目(A2019058)。
关键词
催化剂工程
HY分子筛
苯
氯化苄
二苯甲烷
烷基化
catalyst engineering
HY zeolite
benzene
benzyl chloride
diphenylmethane
alkylation
