摘要
甲苯甲醇烷基化反应选择性合成高浓度对二甲苯技术可提高甲苯利用率,显著降低异构化和吸附分离装置负荷。综述了近年来国内外有关甲苯甲醇烷基化制备对二甲苯的研究进展,包括甲苯甲醇烷基化反应机理、催化剂活性组分、元素改性方法和现有工艺技术。沸石的孔口修饰和外表面酸性位的钝化是影响反应活性和对位选择性的主要因素,活性和选择性高、稳定性好的催化剂的开发是甲苯烷基化技术应用的关键。
Recent technology advances on selective toluene methylation of toluene with methanol to para-xylene were reviewed, including the reaction mechanism of the process, predominant active component, element modification methods on zeolites and several potential industrial technologies of methylation of toluene with methanol. Both the reduction of pore dimension of zeolite catalysts and the suppression of strong acid sites could enhance the selectivity of para-xylene.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2007年第4期359-364,共6页
Chemical Reaction Engineering and Technology
关键词
甲苯
甲醇
烷基化
对二甲苯
改性
toluene
methanol
methylation
para-xylene
modification
