新疆蛭石制备高比表面积二氧化硅的研究  

Study on the Preparation of High Specific Surface Area Silicon Dioxide from Xinjiang Vermiculite

作　　者：葛振红[1] 李国柱 赵超[3] 刘晓静[1] 田维亮[1,3] 

机构地区：[1]塔里木大学新疆兵团南疆化工资源利用工程实验室,新疆阿拉尔843300 [2]阿拉尔市食品药品检验所,新疆阿拉尔843300 [3]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《非金属矿》2018年第2期4-6,共3页Non-Metallic Mines

基　　金：国家自然科学基金(21761029);兵团高等学校优秀青年教师培养计划项目;有机无机复合材料国家重点实验室开放课题(oic-201701008);北化-塔大联合基金

摘　　要：根据蛭石的研究现状,采用盐酸酸化法利用膨胀蛭石制备高比表面积二氧化硅,考察了反应时间、盐酸质量分数和温度等因素的影响规律。结果表明:蛭石颗粒粒径大小是影响蛭石膨胀率的关键因素,颗粒越大,膨胀率越高,20目(830μm)蛭石的膨胀率可以达到5.33倍;膨胀蛭石酸化制备二氧化硅的最佳工艺条件是:反应温度60~90℃,反应时间30 min,盐酸质量分数15%,最大的比表面积为618.31 m2/g。合成的二氧化硅红外表征证明成功制备了二氧化硅。Based on research progress in vermiculite, high specific surface area silica was prepared by acidification method of hydrochloric acid. The influence of reaction time, concentration, temperature and other factors on the preparation of silica was studied. The results show that the particle size of vermiculite is the key factor that affects the expansion rate of vermiculite. The particle size is the larger, the expansion rate is the higher; The expansion rate of 20 mesh （830μm） for vermiculite can reach 5.33 times; the optimum conditions of the preparation of silica are： the reaction temperature of 60-90℃, the reaction time of 30 min, the concentration of hydrochloric acid of 15% and the maximum specific surface area is 618.31 m^2/g. Infrared characterization of synthetic silica showed that silica was obtained.

关 键 词：蛭石 二氧化硅 高比表面积 膨胀率 

分 类 号：TD985[矿业工程—选矿]