异丙醇铝水解制备氧化铝研究  

Study on Synthesis of Alumina Through Hydrolysis of Aluminum Isopropoxide

作　　者：佟佳[1] 吕振辉[1] 薛冬[1] 张学辉[1] 王永标 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001 [2]中国石化金陵分公司,江苏南京210033

出　　处：《当代化工》2017年第9期1803-1806,1810,共5页Contemporary Chemical Industry

摘　　要：采用异丙醇铝水解法制备氧化铝,考察了多种因素对氧化铝物化性质的影响。用X射线衍射、氮物理吸附、扫描电镜等方法分析了所得样品的晶相结构、孔结构以及微观形貌。试验结果表明:异丙醇铝在不同条件下水解均能制备出高纯的拟薄水铝石;提高水解温度有利于提高所制备氧化铝的孔径以及孔容;低水解液浓度有利于制备大孔容的氧化铝,而高水解液浓度有利于制备小孔容的氧化铝;水与异丙醇铝比例在2:1~4:1时拟薄水铝石和氧化铝比表面积和孔容达到最大;水解时间为3~4 h是制备高比表面积和大孔容拟薄水铝石和氧化铝的最佳时间。Alumina was prepared by aluminum isopropoxide method. The effect of process parameters on the physicochemical properties of alumina were studied. Techniques such as XRD, N2-TPD, and SEM were employed to characterize the crystal phase, pore structure, and apparent morphology. The results show that the hydrolysis of aluminum isopropoxide can prepare high pure pseudoboehmite under different conditions. Increasing the hydrolysis temperature is helpful to improve the pore size and pore volume of prepared alumina. Low concentration of hydrolyzate can prepare small pore volume alumina. High concentration of hydrolyzate can prepare large pore volume alumina. When the ratio of water and aluminum isopropoxide is between 2：1 and 4：1, the specific surface and pore volume are the maximum. The best hydrolysis time is 3 ~ 4 h for preparation of high specific surface area and large pore volume alumina.

关 键 词：异丙醇铝 水解 氧化铝 性质 

分 类 号：TQ133.1[化学工程—无机化工]