La2O3/USY催化剂催化甲苯与叔丁醇的烷基化反应Alkylation of Toluene with tert-Butyl Alcohol over La2O3/USY Catalyst
徐卫敏,周志伟,华丽,武文良,赵彦平
摘要(Abstract)：
以超稳Y沸石分子筛(USY)负载La2O3作为催化剂,在100 mL高压釜反应器中进行了甲苯与叔丁醇的烷基化反应。考察了不同La2O3负载量对甲苯与叔丁醇烷基化反应的影响,并用XRD、NH3-TPD等手段对几种负载型催化剂的物化性质进行了表征。当La2O3的负载量为20%时,La2O3仍在USY表面上高度分散,催化剂焙烧温度为573 K时,对叔丁基甲苯的选择性最高为88.05%,叔丁基甲苯的选择性达到99.68%。采用20%La2O3/USY作为催化剂,研究了各种反应条件对催化剂性能的影响。实验结果发现,在适宜的反应条件下,即催化剂的焙烧温度573 K、反应温度453 K、反应时间3 h、叔丁醇与甲苯的摩尔比为3,甲苯转化率达48.59%,对叔丁基甲苯的选择性为85.29%。
关键词(KeyWords)： 甲苯;叔丁醇;烷基化;氧化镧;超稳Y分子筛
基金项目(Foundation): 江苏省高校自然科学重大基础研究项目(07KJA53013)
作者(Author): 徐卫敏,周志伟,华丽,武文良,赵彦平
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