聚合氯化铝制备拟薄水铝石及其性质研究  

Preparation and Property of Pseudoboehmite by Polyaluminum Cloride

作　　者：赵长伟[1] 何劲松[1] 任晓晶[1] 栾兆坤[1] 王军[1] 贾智萍[1] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085

出　　处：《无机化学学报》2010年第3期521-524,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项(No.50708109);教育部留学回国人员科研启动基金资助项目(No.ITLXHG2009071702);环境水质学国家重点实验室专项经费的资助No.09Y02ESPCR)

摘　　要：引言拟薄水铝石是制备γ-Al_2O_3及其系列产物氧化铝的重要前驱体,尤其γ-Al_2O_3在催化剂载体、汽车尾气净化剂、分子筛以及吸附剂等领域得到了广泛地应用。然而不同路线和方法生产的拟薄水铝石赋予了氧化铝不同的性质和用途,因此,开发具有不同孔径和比表面积的拟薄水铝石及其衍生物极为重要和必要。Pseudoboehmite and its derivative were prepared from polyaluminum chloride.EDX,XRD and low temperature nitrogen adsorption-desorption were employed to characterize the samples obtained.The effects of alkaline,polyethylene glycol（PEG） surfactant with different molecular weights on phase and surface area of pseudoboehmite were investigated.The results show that NH_3·H_2O and NaOH can be used as alkaline solution to prepare pure pseudoboehmite.γ-Al_2O_3 can be obtained in the range of 450 to 750℃.Surface area and pore volume decrease but the diameter increases with the increase of calcination temperature.With the increase of PEG molecular weight,the surface area and pore volume ofγ-Al_2O_3 first increases,then decreases.PEG1000 is most suitable for increasing surface area ofγ-Al_2O_3 and surface area of 396 m^2·g^（-1） can be obtained.

关 键 词：聚合氯化铝 拟薄水铝石 Γ-AL2O3 制备 表面活性剂 

分 类 号：O614.31[理学—无机化学] TQ426.65[理学—化学]