SBA-15固载硅钨酸催化合成柠檬酸三丁酯  

Synthesis of tributyl citrate catalyzed by SBA-15 supported silicotungstic acid

作　　者：王志强 张圆圆 包英 陆爽 段莉梅[1] 许良[1,2] 王斌 刘宗瑞 WANG Zhi-qiang;ZHANG Yuan-yuan;BAO Ying;LU Shuang;DUAN Li-mei;XU Liang;WANG Bin;LIU Zong-rui(College of Chemistry and Materials Science,Inner Mongolia University for Nationalities,Tongliao 028043,China;Key Laboratory of the Natural Products Chemistry and Functional Molecular Synthesis of Autonomous Region,Tongliao 028000,China)

机构地区：[1]内蒙古民族大学化学与材料学院,内蒙古通028043 [2]天然产物化学及功能分子合成自治区重点实验室,内蒙古通辽028000

出　　处：《化学研究与应用》2022年第2期417-423,共7页Chemical Research and Application

基　　金：国家自然科学基金项目(21501102,21661026);内蒙古自治区自然科学基金项目(2019MS02002);内蒙古自治区高等学校“青年科技英才支持计划”(NJYT-18-B22);内蒙古民族大学科学研究基金资助项目(NMDYB19051)资助。

摘　　要：以硅钨酸(H_(4)SiW_(12)O_(40))为催化剂、介孔分子筛SBA-15为载体,将浸渍法与焙烧法相结合制备了一系列介孔分子筛固载硅钨酸复合催化剂SiW_(12)/SBA-15;并利用红外光谱(FTIR)、粉末X-射线衍射(XRD)、N_(2)吸附-脱附、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等对其组成、结构及形貌进行表征。将此催化剂用于催化合成柠檬酸三丁酯的酯化反应中,考察酸醇摩尔比、催化剂用量、反应温度、反应时间对催化合成柠檬酸三丁酯酯化率的影响;研究不同焙烧温度对催化剂重复使用性能的影响,获得固载型催化剂制备的最佳焙烧温度为380℃。A series of mesoporous molecular sieve supported silicotungstic acid composite catalysts were prepared by impregnation and calcination,employing H_(4)SiW_(12)O_(40) as catalyst and SBA-15 as carrier.And the composition,structure and morphology of the composite catalysts were characterized by FTIR,XRD,N_(2) adsorption-desorption,SEM and TEM.The catalysts were used in the esterification reaction of synthesis of tributyl citrate.The effects of the molar ratio of acid to alcohol,the amount of catalyst,reaction temperature and reaction time on the esterification rate of synthesis of tributyl citrate were investigated.The effects of different calcination temperatures on the reusability of the catalysts were studied.The results show that the optimal calcination temperature for the supported catalyst is 380℃.

关 键 词：介孔分子筛 硅钨酸 酸催化 柠檬酸三丁酯 

分 类 号：O611.3[理学—无机化学]