由钾长石焙烧渣的酸化溶液制备高纯Al(OH)_3  

Preparation of High Purity Al(OH)_3 from the Sulfating Solution of Potash Feldspar Roasting Residue

作　　者：刘佳囡 黄建帝 吴艳[1] 翟玉春[1] 

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]渤海大学化学化工学院,辽宁锦州121013

出　　处：《东北大学学报（自然科学版）》2017年第8期1102-1106,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51204054);中央高校基本科研业务费专项资金资助项目(N140204011)

摘　　要：以钾长石焙烧渣的酸化溶液为原料,Na_2CO_3溶液为沉淀剂制备高纯Al(OH)_3.实验考察了溶液终点pH值、反应温度、陈化时间、Na_2CO_3质量浓度对沉铝率的影响,得到优化工艺条件.采用化学成分分析,XRD,SEM,FTIR对Al(OH)_3粉体进行表征.结果表明:在反应温度50℃的条件下,加入质量浓度为300 g/L的Na_2CO_3溶液调节Al_2(SO_4)_3溶液,使其终点pH值至4.8,控制陈化时间40 min,沉铝率可达99%.得到的Al(OH)_3粉体为非晶态结构,颗粒均匀,表面粗糙,有团聚现象.Employing the sulfating solution of potash feldspar roasting residue as raw materials and Na2CO3 solution as precipitator, the high purity Al（OH）3 was prepared.The effects of the pH value at the end of precipitating Al, reaction temperature, aging time and the mass concentration of Na2CO3 solution on the precipitation rate of Al were investigated.Al（OH）3 powder was characterized by chemical component analysis, X-ray diffraction（XRD）, scanning election microscope（SEM）, and Fourier transform infrared spectroscopy （FTIR）.The optimum technological conditions, which could guarantee the precipitation rate of Al more than 99%,were to keep reaction temperature at 50℃, add the Na2CO3 solution with the mass concentration of 300g/L into Al2（SO4）3 solution, control the pH value at 4.8 and the aging time for 40min.The features for the produced Al（OH）3 powder were that the crystal was amorphous, the particles were homogeneous with rough surface and the particles agglomeration occurred.

关 键 词：钾长石焙烧渣 酸化溶液 Na2CO3溶液 水解沉淀法 高纯Al(OH)3 

分 类 号：TQ133[化学工程—无机化工]