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中文摘要：
分别用H2SO4、盐酸和NaOH溶液对催化剂载体硅胶在不同溶液浓度、浸泡温度和时间等操作条件下进行处理,修饰其表面化学性质及其孔结构特性;以无水AlCl3为活性组分前驱体,采用密闭加压负载法制备了AlCl3/硅胶催化剂,考察了载体的酸碱修饰对焦化苯中噻吩与烯烃烷基化催化反应活性的影响。结果表明,催化剂表面的羟基是影响烷基化催化剂活性组分负载的主要因素;3种溶液的修饰改性均不同程度地改善了羟基活性位点、比表面积和孔径分布,有利于反应产物的扩散,有效提高了催化剂的烷基化反应活性。其中,在0.05mol/L的盐酸溶液中处理12h后制得的AlCl3/硅胶催化剂的活性最佳,此条件下的噻吩转化率高达98%。
英文摘要：
H2SO4,hydrochloric acid and NaOH aqueous solutions were used to treat the silica gel in different concentration of solution,soaking temperature and time,so as to modify the surface chemical environment and pore structure characteristic.The AlCl3/silica gel catalyst was prepared by inclosed grafting method with anhydrous AlCl3 as the active component precursor.The influence of acid and alkali modification of carrier on the catalytic activity of catalyst for the alkylation of thiophene and olefin in coking benzene was investigated.The results show that hydroxyl groups on the surface of the catalyst was the main factor influencing the load of alkylation catalyst active component.The modification of three kinds of solutions improved hydroxyl active sites,specific surface area and pore size distribution in different degrees,which was conducive to the diffusion of the reaction products,thus effectively increased the alkylation reaction activity of catalysts.Among them,AlCl3/silica gel catalyst treated with 0.05mol/L hydrochloric acid aqueous solution for 12 hhad the best activity with a thiophene conversion rate as high as 98%.
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