在杂多酸催化剂上苯和1十二烯的烷基化合成十二烷基苯  

Alkylation of Benzene with 1-Dodecene Catalyzed by Heteropoly Acids

作　　者：温朗友[1] 沈师孔[1] 闵恩泽[2] 

机构地区：[1]石油大学(北京)化工学院,北京102200 [2]中国石油化工集团公司石油化工科学研究院,北京100083

出　　处：《催化学报》2000年第6期529-533,共5页

摘　　要：对比研究了磷钨酸 ,SiO2 负载磷钨酸 ,HY及Hβ分子筛催化剂的酸性和对苯与 1 十二烯的烷基化反应的催化性能 .结果表明 ,磷钨酸催化剂具有酸性强、低温活性高和 2位异构体选择性好等突出特点 ,特别是将磷钨酸负载于SiO2 载体上之后 。The alkylation of benzene with 1 dodecene to produce linear alkylbenzene was investigated over heteropoly acid (PW) catalysts (12 phosphotungstic acid and silica supported 12 phosphotungstic acid) compared with zeolite catalysts (HY and Hβ). The physical and acid properties of the catalysts were characterized by nitrogen physisorption technique and n butylaminetitration with Hammett indicators, respectively. The alkylation reaction was carried out in a slurry reactor under atmospheric pressure. The characterization results show that the PW has only superstrong Brnst acid sites, while HY and Hβ have both strong Brnst and Lewis acid sites. Owing to the unique acid properties, PW catalysts can promote the alkylation reaction effectively even at room temperature and produce more desired 2 phenyldodecane isomer. After being supported on silica, the specific activity of PW has been increased by a factor of 17 times and the catalyst life has been improved greatly. These results suggest that heteropoly acid is a novel solid catalyst with better catalytic performance for the alkylation of benzene with long chain alkenes.

关 键 词：苯 1-十二烯 烷基化 十二烷基苯 杂多酸催化剂 

分 类 号：O625.11[理学—有机化学] O643.36[理学—化学]