表面活性剂对铝酸钠溶液中一水软铝石晶种分解的影响  

Effects of Surfactants on Seeded Precipitation of Boehmite from Sodium Aluminate Solution

作　　者：徐荣广[1,2] 王志[1] 公旭中[1] 

机构地区：[1]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《过程工程学报》2012年第3期388-394,共7页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50704030);国家科技支撑计划基金资助项目(编号:2012BAF03B01)

摘　　要：研究了非离子及阴离子型表面活性剂(聚乙二醇、聚氧乙烯月桂醚和十二烷基苯磺酸钠)对铝酸钠溶液晶种分解制备一水软铝石的影响.结果表明,十二烷基苯磺酸钠抑制溶液分解及晶体附聚,导致产物粒度细化;聚乙二醇可强化溶液分解,并促进晶体附聚;PEG1000添加量为1g/L时获得最高分解率(32.39%),较空白提高8.37%;PEG1000添加量为5g/L时附聚效果最好,产物的中位粒径为23.86m,较空白提高4.5%.XRD和热重分析结果表明,添加剂未改变产物晶型,产物均为一水软铝石和三水铝石.The effects of nonionic and anionic surfactants [polyethylene glycol （PEG）, polyoxyethylene lauryl ether and sodium dodecylbenzene sulfonate] on boehmite seeded precipitation from sodium aluminate solution were investigated. The results showed that precipitation and agglomeration of crystals were inhibited by sodium dodecylbenzene sulfonate, resulting in refinement of product, the precipitation was intensified and agglomeration of particles was promoted by polyethylene glycol. The largest precipitation rate （32.39%） was obtained with PEG1000 addition of 1 g/L, increased by 8.37%. The best agglomeration efficiency was gained with PEG1000 addition of 5 g/L, and median particle size （D50） of product was 23.86 μm, improved by 4.5%. The analytical results by XRD and TG showed that the crystalline structure of products did not change owing to additive charge, and all products were Al（OH）3 and AlOOH.

关 键 词：铝酸钠溶液 表面活性剂 一水软铝石 分解 附聚 

分 类 号：TF821[冶金工程—有色金属冶金]