异丙醇铝制备拟薄水铝石和氧化铝

发布时间：2018-04-28 00:14

本文选题：异丙醇铝 + 拟薄水铝石　；参考：《石油化工》2017年05期

【摘要】：采用异丙醇铝水解制备拟薄水铝石和氧化铝,通过正交实验考察了水解温度、水解液浓度、水与异丙醇铝质量比和水解时间对拟薄水铝石和氧化铝物化性质的影响。采用XRD、氮吸附-脱附、SEM等方法分析了试样的晶相结构、孔结构及微观形貌。正交实验结果表明,异丙醇铝在何种条件下水解均能制备出高纯度的拟薄水铝石;在所考察的4个因素中,水解液浓度是影响拟薄水铝石和氧化铝孔性质的主要因素;55℃是制备高比表面积和大孔体积拟薄水铝石和氧化铝的最佳水解温度;低水解液浓度有利于制备大孔体积的拟薄水铝石和氧化铝,而高水解液浓度有利于制备小孔体积的拟薄水铝石和氧化铝。水与异丙醇铝质量比为(2∶1)~(4∶1)时,拟薄水铝石和氧化铝比表面积和孔体积最大;制备高比表面积和大孔体积拟薄水铝石和氧化铝的最佳水解时间为3~4 h。
[Abstract]:The pseudo boehmite and alumina were prepared by hydrolysis of aluminum isopropanol. Through orthogonal experiments, the effects of hydrolysis temperature, concentration of hydrolysate, mass ratio of water and aluminum isopropanol and hydrolysis time on the physicochemical properties of pseudo boehmite and alumina were investigated. The crystal phase structure, pore structure and microstructure of the sample were analyzed by XRD, nitrogen adsorption desorption, SEM and other methods. The orthogonal experimental results show that the high purity of the pseudo boehmite can be prepared by the conditions of aluminum isopropanol, and the concentration of the hydrolysate is the main factor affecting the properties of the pore of the pseudo boehmite and alumina in the 4 factors. The optimum hydrolysis of the high specific surface area and the large pore volume of the pseudo boehmite and alumina can be obtained at 55. The concentration of low hydrolysate is beneficial to the preparation of pseudo boehmite and alumina with large pore volume, while the concentration of high hydrolysate is beneficial to the preparation of pseudo bobbite and alumina with small pore volume. When the mass ratio of water to aluminum isopropanol is (2: 1) ~ (4: 1), the specific surface area and pore volume of the pseudo boehmite and alumina are the largest; high specific surface area and large pore size are prepared. The optimum hydrolysis time for volume pseudo boehmite and alumina is 3~4 H.

【作者单位】：中国石化抚顺石油化工研究院;
【分类号】：TQ133.1

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