化工进展2018，Vol.37Issue(6)：2386-2391,6.DOI:10.16085/j.issn.1000-6613.2017-1698
邻碘苯甲酸铵循环去除粗氧化钪中的锆和铪
Removal of zirconium and hafnium with ammonium o-iodobenzoate from the crude scandium oxide
刘卫 1何捍卫 2尹志芳 1杨泱 3陈月华2
作者信息
- 1. 中南大学粉末冶金国家重点实验室,湖南 长沙 410083
- 2. 益阳鸿源稀土有限责任公司,湖南 益阳 413001
- 3. 湖南城市学院材料与化学工程学院,湖南 益阳413001
- 折叠
摘要
Abstract
As we know that the zirconium and hafnium elements have similar physical and chemical properties with the scandium,this is one of main reasons for a low purity of scandium oxide because it is difficult to separate them. In order to solve this problem,an ammonium o-iodobenzoate was used as a precipitant to remove the zirconium and hafnium impurities in scandium oxide. Different experimental parameters were optimized systematically enabling the best condition. To further verify and improve the process conditions,large scale production experiments using the industrial devices were also studied based on the laboratory result. The optimized treatment conditions were obtained when the acidity of the solution was 0.1mol/L,the amount of the precipitant was 1.1 times of the theoretical value,and the temperature was 100℃ during stirring for 30min. To recover the ammonium o-iodobenzoate,ammonia solution was used to deal with the zirconium and hafnium deposit. The FTIR、SEM and HPLC results indicated that zirconium and hafnium elements have been transformed into hydroxide precipitation and the ammonium o-iodobenzoate was recovered. The recoveries of scandium and ammonium o-iodobenzoate in industrial experiments were 99.54% and 95.19%,respectively.The removal ratio for both zirconium and hafnium was 99.6%.关键词
邻碘苯甲酸铵/分离/沉淀/反应/钪/锆/铪Key words
ammonium o-iodobenzoate/separation/precipitation/reaction/scandium/zirconium/hafnium分类
矿业与冶金引用本文复制引用
刘卫,何捍卫,尹志芳,杨泱,陈月华..邻碘苯甲酸铵循环去除粗氧化钪中的锆和铪[J].化工进展,2018,37(6):2386-2391,6.
