高效除硅性能的改性膨润土制备工艺优化  

Study on optimization of higher silicate removal modified bentonite

作　　者：林涛[1] 李雪[1] 徐永建[1,2,3] 朱振峰[2] 张鼎军 

机构地区：[1]陕西科技大学轻工与能源学院陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [2]陕西科技大学材料科学与工程博士后科研流动站,陕西西安710021 [3]贵州赤天化集团有限责任公司,贵州赤水564700

出　　处：《陕西科技大学学报（自然科学版）》2014年第3期15-19,共5页Journal of Shaanxi University of Science & Technology

基　　金：国家科技部十二五科技支撑计划项目(2012BAD23B0201);国家自然科学基金项目(20876092);陕西科技大学学科带头人培育计划项目(2013XSD25)

摘　　要：以钠基膨润土为原料,通过添加铝盐为改性剂,制备出了一种新型高效绿液除硅剂,其硅吸附效率最高可达90%左右.并以竹浆绿液的硅吸附率和pH变化为标准,研究了该种改性膨润土的制备工艺.其最佳工艺条件为:钠基膨润土与铝盐的质量比为1∶4;添加顺序先将钠基膨润土与水混合,再加入铝盐,加水量为66mL/1g钠基膨润土;搅拌时间为2h,搅拌速率为1 200r/min;反应温度为室温,静置分离12h,105℃干燥,研磨,过200目筛.A novel and efficient silicate removal adsorbent was prepared from Na-bentonite and the aluminum salt used as the modified agent.The adsorption rate of aluminum salt modified bentonite could reach at about 90%.The preparation process of modified bentonite was explored as the standard of the adsorption and change rate in green liquor.The optimum conditions were that mass ratio between Na-bentonite and aluminum salt was 1∶4;the order of adding raw materials was that Na-bentonite was mixed with water at first,then,aluminum salt was added;the water addition was 66mL/1g of Na-bentonite;stirring time was 2h;stirring speed was 1 200r/min;reaction temperature was at room temperature;separate time was 12h;dried at 105℃and screened through 200mesh.

关 键 词：钠基膨润土 铝盐 制备 绿液 除硅 

分 类 号：TS71[轻工技术与工程—制浆造纸工程] X703[环境科学与工程—环境工程]