【摘要】 在负载杂多钨酸催化剂上 ,考察了反应原料组成、杂多钨酸负载量 (lcat)、催化剂对反应物质量比 (mcat/mrea)、反应温度 (T)、反应时间 (t)及原料中苯基 (C6H5— )和异丙基 ((CH3 ) 2 CH— )的摩尔比 (n(C6) /n(i C3 ) )对苯与二异丙苯烷基转移反应的影响。结果表明 ,苯与二异丙苯的反应是由多个可逆反应组成的平衡体系 ,产物组成仅与反应温度和n(C6) /n(i C3 )有关 ;增加杂多钨酸负载量和催化剂用量、提高反应温度均能缩短反应的平衡时间 ,但反应温度高于 180℃、n(C6) /n(i C3 )低于 3时 ,异丙苯的选择性下降。更多还原

【Abstract】 The efffects on transalkylation of benzene with diisopropyl benzene over supported he teropoly tungstic acid catalysts were studied, including feed composition, heteropoly tungstic acid loadings( l cat ), mass ratio of catalyst to reactants ( m cat / m rea ), reaction temperature( T ), reaction time( t ) and molar ratio of phenyl(C 6H 5-) to isopropyl((CH 3) 2CH-) in diisopropyl benzene ( n (C 6)/ n ( i C 3)) . The reaction of benzene with diisopropylbenzene is a equilibrium system containing several reactions. The composition of products was related to T and n (C 6)/ n ( i C 3). With the increase of l cat , m cat / m rea and T , the reaction time was shortened. The reaction selectivity decreased when the reaction temperature was above 180℃ or the n (C 6)/ n ( i C 3) was below 3.更多还原