固定床直接法合成三乙氧基硅烷的研究  

Study on direct synthesis of triethoxysilane in a fixed bed reactor

作　　者：徐茂兰 籍煜雯 郭瑞丽[1] 张建树[1] 张金利 高娟[3] 刘富贵 万伟 XU Maolan;JI Yuwen;GUO Ruili;ZHANG Jianshu;ZHANG Jinli;GAO Juan;LIU Fugui;WAN Wei(School of Chemistry and Chemical Engineering/Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan,Shihezi University,Shihezi,Xinjiang 832003,China;School of Chemical Engineering&Technology,Tianjin University,Tianjin 300072,China;Xingjiang Daqo New Energy Co.Ltd.,Shihezi,Xingjiang 832000,China)

机构地区：[1]石河子大学化学化工学院/新疆兵团化工绿色过程重点实验室,新疆石河子832003 [2]天津大学化工学院,天津300072 [3]新疆大全新能源有限公司,新疆石河子832000

出　　处：《石河子大学学报（自然科学版）》2024年第6期670-676,共7页Journal of Shihezi University(Natural Science)

基　　金：新疆生产建设兵团重大科技计划项目(2020AA004)。

摘　　要：本文通过真空蒸发沉积预处理增强CuCl与硅颗粒之间的相互作用,从而提高直接合成三乙氧基硅烷的反应效率。真空蒸发沉积法有利于促进氯化亚铜沉积到硅颗粒表面,形成Cu_(3)Si活性相。在固定床反应器中,对预处理样品进行催化活性评价,研究不同铜物种对直接合成三乙氧基硅烷的影响。考察了预处理温度、预处理时间、及不同反应温度等因素对硅粉转化率、三乙氧基硅烷选择性和收率的影响。在最优工艺条件,硅粉的最大转化率为5.79%,三乙氧基硅烷选择性为83.48%。采用XRD、SEM对预处理样品进行了表征,以及原子吸收测定预处理样品中不同铜物种的含量,结果表明Cu_(3)Si是催化合成三乙氧基硅烷的活性中心。In this paper,the interaction between CuCl catalyst and silica particles is enhanced by vacuum evaporation deposition pretreatment,which improves the reaction efficiency of direct synthesis of triethoxysilane.The vacuum evaporation deposition is favourable for promoting the deposition of cuprous chloride on the surface of silicon particles,and then the Cu_(3)Si active phase is formed.The catalytic activity of pretreated samples was evaluated in a fixed-bed reactor to study the effect of different copper species on the direct synthesis of triethoxysilanes.And the effects of influencing factors,such as pretreatment temperature,pretreatment time,and different reaction temperatures on Si conversion,triethoxysilane selectivity and yield were investigated.Under the optimum conditions,the maximum conversion of Si could reach 5.79%,and the triethoxysilane selectivity was 83.48%.The pretreated samples were characterized by XRD and SEM,and the the content of different copper species in the samples were determined with the atomic absorption spectrum,these results show that Cu_(3)Si is the active phase that catalyses the synthesis of triethoxysilane.

关 键 词：三乙氧基硅烷 氯化亚铜 预处理 Cu_(3)Si 蒸发沉积 

分 类 号：TQ261[化学工程—有机化工]