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《Journal of Beijing University of Chemical Technology(Natural Science Edition)》 2006-06
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Dodecylbenzene synthesis by the alkylation of benzene with 1-dodecene over mesoporous zeolites

LI Juan~1 YAN Shi-cheng~2 LI Jian-wei~1 CHEN Biao-hua~1 DENG Wei~1(1.State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China;2.Jilin Vocational College of Industry and Technology,Jilin 132000,China)  
The catalytic performance of MCM-22,phosphorus-doped MCM-22(0.5%P) and MCM-22(1.5%P) mesoporous zeolites in the alkylation of benzene with 1-dodecene was experimentally evaluated using a batch reactor under the following conditions: 50-70?℃,benzene/1-dodecene molar ratio 8 and atmospheric pressure. Combining these results with NH_3-TPD,XRD and BET data,the influence of the physicochemical properties of the zeolites on their catalytic performance was investigated.The results showed:(1) all three zeolites possess both weak and strong acid sites,and the amount of strong acid sites is sufficient to increase both the zeolite activity and the selectivity to 2-linear alkylbenzenes(2-LAB);(2) the selectivity to 2-LAB was enhanced by increasing P content in the zeolite,but large P content resulted in decreased conversion of 1-dodecene,and therefore intermediate P content is most effective;(3) MCM-22(0.5%P) had the best catalytic performance in dodecylbenzene synthesis of the three zeolites investigated,with conversion of 1-dodecene reaching 34%,and selectivity of 2-LAB was above 60% under 70?℃.
【Fund】: 教育部新世纪优秀人才支持计划(NCET-04-0117)
【CateGory Index】: TQ423.11
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