负载杂多酸催化剂的表征及催化合成乙酸正丁酯的研究 Ⅰ．负载杂多酸催化剂制备及表征  

STUDY ON THE SYNTHESIS OF NORMAL BUTYL ACETATE OVER SILICOTUNGSTIC ACID SUPPORTED CATALYSTⅠ.Synthesis and Characterization of Silicotungstic Acid(SiW_(12))Supported Catalyst

作　　者：杜迎春[1] 郭金宝[1] 

机构地区：[1]北京服装学院材料科学与工程学院,北京100029

出　　处：《石油炼制与化工》2007年第7期34-39,共6页Petroleum Processing and Petrochemicals

摘　　要：采用浸渍法,以硅胶、中性氧化铝、超稳Y沸石和β沸石分子筛为载体,制备了一系列不同负载量的SiW_(12)杂多酸催化剂,并采用IR和XRD等手段对催化剂的物化性质进行了表征。结果表明,在酸性载体(硅胶)、超稳Y沸石和β沸石上,可形成具有Keggin结构的SiW_(12)杂多酸结晶,出现了明显的层状结构,酸性沸石原有的IR与XRD特征峰变得弥散或消失。在中性氧化铝上进行负载后,没有明显的Keggin结构特征峰。A series of 12-silicotungstic acid（SiW12 ）immobilized catalysts supporte d on silica gel, neutral alumina, USY and zeolite 13 were prepared using impregnation method. Their physicochemical properties were characterized by FT-IR and XRD techniques. Results showed that the anion of HSiW12 supported on silica gel, USY and zeolite β was kept in typical structure of Keggin with apparent layer structure,and the characteristic zeolite peaks were dispersed or disappeared. Structure of Keggin was not found in the FT-IR and XRD patterns of catalyst prepared by neutral alumina.

关 键 词：杂多酸催化剂 KEGGIN结构 红外光谱法 X射线光谱法 

分 类 号：O643.32[理学—物理化学]