Effects of Surfactants on Seeded Precipitation of Boehmite from Sodium Aluminate Solution
XU Rong-guang WANG Zhi GONG Xu-zhong
National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, CAS
Institute of Process Engineering, Chinese Academy of Sciences National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, CAS
Abstract：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 mm, 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.
徐荣广 王志 公旭中. 表面活性剂对铝酸钠溶液中一水软铝石晶种分解的影响[J]. , 2012, 12(3): 388-394.
XU Rong-guang WANG Zhi GONG Xu-zhong. Effects of Surfactants on Seeded Precipitation of Boehmite from Sodium Aluminate Solution. , 2012, 12(3): 388-394.
2012, Vol. 12 
