坡缕石负载纳米SO_4^(2-)/TiO_2固体超强酸催化合成偏苯三酸三辛酯  

Synthesis of Trioctyl Trimellitate Catalyzed by Palygorskite Supported Nano-sized SO_4^(2-)/TiO_2 Solid Superacid

作　　者：常玥[1,2,3] 应婵娟[1] 任小宁[1] 祁彩菊[1] 马红斌[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070 [2]生态环境相关高分子材料教育部重点实验室,甘肃兰州730070 [3]甘肃省高分子材料重点实验室,甘肃兰州730070

出　　处：《精细化工》2011年第7期693-697,共5页Fine Chemicals

基　　金：2007中科院"西部之光"人才培养计划地方项目;甘肃省自然科学基金资助项目(200803RJZA007);2010西北师范大学知识与科技创新工程项目(nwnu-kjcxgc-03-63)~~

摘　　要：以坡缕石(PGS)浸渍负载TiO2,H2SO4改性后制备了固体超强酸SO42-/TiO2-PGS,利用红外光谱、X射线粉末衍射、扫描电镜、比表面仪对催化剂结构进行了表征。用正交设计法探讨了SO42-/TiO2-PGS对合成偏苯三酸三辛酯的催化活性,实验结果表明,在油浴温度210℃,偏苯三酸酐和2-乙基己醇的摩尔比为1∶4.5,催化剂用量为总反应原料质量的3.7%,反应6 h酯化率可达94.15%。Palygorskite（PGS）supported TiO2 was prepared by dipping method of acid activated palygorskite,which was then modified by H2SO4 to obtain SO42-/TiO2-PGS solid super acid.The catalyst which was applied in the synthesis of trioctyl trimellitate,was characterized by means of FTIR,XRD spectroscopy,SEM and BET.The orthogonal experiment shows that the esterification yield is 94.15% under the following conditions：the molar ratio of trimellitic anhydride to 2-ethylhexyl alcohol is 1∶4.5,the mass of catalyst is 3.7%of total mass,the reaction time is 6 h and the oil bath temperature is 210 ℃.

关 键 词：坡缕石 SO42-/TiO2 固体超强酸 偏苯三酸三辛酯 催化技术 

分 类 号：TQ426.8[化学工程] O643.36[理学—物理化学]