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Separation and extraction of niobium from H2SO4 solution containing titanium and iron impurities

文献类型：期刊论文

作者Sun, Linquan2,3; Zhang, Xukun2,3; Wang, Lina2,3,4; Yu, Hongdong2,3; Meng, Fancheng2,3; Qi, Tao2,3; Peng, Yihe1
刊名SEPARATION AND PURIFICATION TECHNOLOGY
出版日期2022-08-15
卷号295页码:12
ISSN号1383-5866
关键词Separation Extraction Niobium Titanium Iron
DOI10.1016/j.seppur.2022.121207
英文摘要A fluoride-free solvent extraction method for niobium separation in leached sulfuric mother liquor of ilmenorutile was proposed in this paper. The extraction system comprising trioctyl tertiary amine (N235) and 4-methyl-2-pentanone (MIBK) demonstrated good extraction efficiency and selectivity of niobium over titanium and iron impurities in sulfuric acid-oxalate solutions. Details of extraction, scrubbing, and stripping processes were investigated herein, and its practical effectiveness in both batch and multi-stage simulated counter-current modes was verified. Over 73.8% niobium was extracted under optimum conditions, and only 2.8% titanium and 1.7% iron were co-extracted. The recovery of niobium reached 99.1% in the four-stage simulated countercurrent extraction tests. In the three-stage simulated counter-current stripping tests, the stripping efficiency of niobium reached 99.7% with 2.0 mol/L HNO3. Qualified niobium oxide products were prepared. The enthalpy change, entropy change, and the standard Gibbs free energy change (Delta H-0, Delta S-0, and Delta G(0), respectively) corroborated the exothermicity, orderliness, and spontaneity of the reaction. The possible composition of the extraction complex was [NbO(C2O4)(2)(H2O)(2)](-), as supported by a Fourier transform infrared spectroscopy and ultraviolet-visible spectrophotometry. The extraction mechanism was inferred to be the outer-sphere complexation through physical binding which was the association of R3NH+ in N235 with the [NbO(C2O4)(2)(H2O)(2)](-). A preliminary mass balance indicated that 203.92 g Nb2O5 was generated from 1000 g raw material ilmenorutile.
WOS关键词LIQUID-LIQUID-EXTRACTION ; SOLVENT-EXTRACTION ; TANTALUM ; FLUORIDE ; RECOVERY ; HEXANIOBATE ; SLAG
资助项目National Key R&D Pro-gram of China[2018YFC1900500] ; National Key R&D Pro-gram of China[2018YFE0123100] ; Key Research Program of Frontier Sciences of Chinese Academy of Sci-ences[QYZDJ-SSW-JSC021] ; Special Project for Trans-formation of Major Technological Achievements in Hebei Province[19044012Z] ; Province Key R&D Program of Hebei[20374105D]
WOS研究方向Engineering
语种英语
出版者ELSEVIER
WOS记录号WOS:000805112700003
资助机构National Key R&D Pro-gram of China ; Key Research Program of Frontier Sciences of Chinese Academy of Sci-ences ; Special Project for Trans-formation of Major Technological Achievements in Hebei Province ; Province Key R&D Program of Hebei
源URL[http://ir.ipe.ac.cn/handle/122111/53726]  
专题中国科学院过程工程研究所
通讯作者Wang, Lina
作者单位1.Hebei Zhongke Tongchuang Vanadium & Titanium Techn, Hengshui 053000, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 101408, Peoples R China
4.Proc Bldg 1,North 2nd St, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Linquan,Zhang, Xukun,Wang, Lina,et al. Separation and extraction of niobium from H2SO4 solution containing titanium and iron impurities[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,295:12.
APA Sun, Linquan.,Zhang, Xukun.,Wang, Lina.,Yu, Hongdong.,Meng, Fancheng.,...&Peng, Yihe.(2022).Separation and extraction of niobium from H2SO4 solution containing titanium and iron impurities.SEPARATION AND PURIFICATION TECHNOLOGY,295,12.
MLA Sun, Linquan,et al."Separation and extraction of niobium from H2SO4 solution containing titanium and iron impurities".SEPARATION AND PURIFICATION TECHNOLOGY 295(2022):12.

入库方式： OAI收割

来源：过程工程研究所

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