硅烷化改性Beta分子筛催化乙酰丙酸酯化合成乙酰丙酸正丁酯的性能研究  

Study on performance of silane modified Beta molecular sieve for catalytic esterification of levulinic acid to n-butyl levulinate

作　　者：卢欣欣 胡华雷[2] 吕晓静[1] 张业新[2] 张建[2] LU Xin-xin;HU Hua-lei;LV Xiao-jing;ZHANG Ye-xin;ZHANG Jian(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China)

机构地区：[1]浙江工业大学化学工程学院,浙江杭州310014 [2]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《现代化工》2023年第10期105-110,共6页Modern Chemical Industry

基　　金：国家自然科学基金面上项目(22072170);浙江省重点研发计划项目(2021C03170)。

摘　　要：以十八烷基三氯硅烷(OTS)为硅烷化试剂,制备了一系列硅烷化改性的Beta分子筛催化剂。通过X射线衍射仪(XRD)、N_(2)吸附-脱附比表面仪(BET)、热重分析仪(TG)、接触角测量仪等对所制备催化剂的物化性质进行表征,并研究了其催化乙酰丙酸(LA)与正丁醇合成乙酰丙酸正丁酯(BL)的性能。结果表明,硅烷化改性可向Beta分子筛引入硅烷化基团并有效提高催化剂的疏水性,进而促进LA在催化剂上酯化为BL。Using octadecyl trichlorosilane(OTS)as modifying reagent,a series of silane-modified Beta molecular catalysts are prepared.The physicochemical properties of the prepared catalyst are systematically characterized by means of X-ray diffractometry,N_(2) adsorption-desorption surface area analyzer,thermogravimetric analyzer and contact angle measurement,and their catalytic performance for the synthesis of n-butyl levulinate from levulinic acid and n-butanol is studied.It is indicated that the modification led by silane can effectively improve the hydrophobicity of the catalyst by adding the silane group into Beta molecular sieve,which in turn promote the esterification of levulinic acid to n-butyl levulinate on the catalyst.

关 键 词：乙酰丙酸 乙酰丙酸正丁酯 Beta分子筛 硅烷化 十八烷基三氯硅烷 

分 类 号：TQ35[化学工程]