膨润土负载磷钨酸催化棕榈酸甲酯化反应研究  

Modification Bentonite with Phosphotungstic Acid for Esterification of Palmitic Acid

作　　者：苏国钧[1] 马静[1] 黄文[1] 刘轲[1] 

机构地区：[1]湘潭大学化学学院环境友好化学与应用教育部重点实验室,湖南湘潭411105

出　　处：《湘潭大学自然科学学报》2015年第4期42-46,共5页Natural Science Journal of Xiangtan University

摘　　要：采用浸渍蒸发法制备出酸化膨润土负载磷钨酸催化剂(HPW/AAB),通过FTIR、XRD、SEM、BET等手段对其结构和形貌加以表征,并考察其对棕榈酸甲酯化反应的催化性能.结果表明:在65°C和醇酸比为20∶1时,磷钨酸负载量为20%的催化效率最佳,反应6h酯化率达87.2%.The heteropoly acid {HPW） was supported on the acidified bentonite {AAB） using the method of saturation impregnation. The obtained supported catalysts were characterized by Fourier transforminfra- red absorption spectra （FTIR） , scanning electronmicroseopy {SEM） , X-ray diffraction （XRD） , specific surface area （BET）, and its catalytic properties on the esterifieation reaction of methyl palmitate were studied. The results show that the HPW/AAB has the optimal catalytic properties on the esterification reaction with the conditions of reaction temperature 65 ℃, molar ratio of methanol to palmitic 20 ： 1, reaction time 6 h and loading of catalysts 20% , and the esterification rate is 87.2%

关 键 词：膨润土 杂多酸 棕榈酸甲酯 酯化反应 

分 类 号：O613.62[理学—无机化学]