改性纳米Al(OH)_3粉体的制备  

Preparation of Surface-modified Nanosized Al(OH)_3 Powders

作　　者：刘有智[1] 李裕[1] 柳来栓[1] 

机构地区：[1]华北工学院化学工程系,山西太原030051

出　　处：《过程工程学报》2003年第1期57-61,共5页The Chinese Journal of Process Engineering

基　　金：山西省自然科学基金资助项目(编号:20011018)

摘　　要：以铝酸钠溶液和二氧化碳气体为原料,采用碳分法制备纳米Al(OH)3粉体. 考察了原料液浓度、气液流量比、旋转填料床转速等因素对Al(OH)3粒径d50的影响. 在Al(OH)3胶体溶液中添加复合表面活性剂三乙基苄基氯化铵/磷酸钠(TEBAC/PO43-),对Al(OH)3粒子进行防团聚研究. 利用XRD和TEM等测试方法对最终产物进行了分析表征,表明所制备的Al(OH)3粒子呈单斜晶系,具有憎水性,粒度分布均匀,平均粒径20 nm.Nanosized Al(OH)3 powder was prepared by the carbonation method from sodium aluminates solution and carbon dioxide. The influence of concentration of reactant, rotating speed of rotating packed bed and ratio of gas-liquid flow rate on Al(OH)3 particle size in the preparation process was investigated. The optimal operating optimum conditions were determined as follows: sodium aluminates 120 g/L, ratio of gas-liquid flow rate 1.5~4.0, rotating speed 1200 r/min. Adding surface modifier TEBAC/PO43- is helpful to the control of agglomeration of Al(OH)3 particles. The product was characterized by TEM and XRD. The prepared particles are monoclinic and well-dispersed with a mean size of 20 nm .

关 键 词：旋转填料床 碳分法 纳米氢氧化铝 制备 复合表面活性剂 表面改性 

分 类 号：TQ016.1[化学工程]