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过程工程学报 ›› 2017, Vol. 17 ›› Issue (6): 1182-1187.DOI: 10.12034/j.issn.1009-606X.217173

• 反应与分离 • 上一篇    下一篇

用萃取剂P507从盐酸浸出液中萃取分离钒与铁

李 丹1,2,3， 陈德胜1,2,*， 张国之1,2,3， 赵宏欣1,2， 齐涛1,2,*， 王伟菁1,2， 王丽娜1,2， 刘亚辉1,2   

  1. 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. 中国科学院过程工程研究所绿色过程与工程重点实验室，北京 100190；3. 中国科学院大学化学与化工学院，北京 100049
  • 收稿日期:2017-03-13 修回日期:2017-04-26 出版日期:2017-12-20 发布日期:2017-12-05
  • 通讯作者: 齐涛 tqi@ipe.ac.cn
  • 基金资助:
    国家重点基础研究发展计划(973)项目;国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目

Separation of Vanadium(IV) from Iron(II) in Hydrochloric Acid Solution by Solvent Extraction with P507

Dan LI1,2,3,  Desheng CHEN1,2,*,  Guozhi ZHANG1,2,3,  Hongxin ZHAO1,2,  Tao QI1,2,*,  Weijing WANG1,2,  

Lina WANG1,2,  Yahui LIU1,2   

  1. 1. National Eng. Lab. for Hydrometallur. Cleaner Production Technol., Inst. Process Eng., CAS, Beijing 100190, China; 2. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, CAS, Beijing 100190, China; 3. College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-03-13 Revised:2017-04-26 Online:2017-12-20 Published:2017-12-05
  • Contact: QI Tao tqi@ipe.ac.cn

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摘要： 用2-乙基己基膦酸单2-乙基己基酯(P507)作为萃取剂，研究了从铁含量高、钒含量低、杂质含量高的盐酸浸出液中溶剂萃取分离钒与铁. 实验结果表明，在浸出液初始的pH 0-0.6、萃取温度30°C、萃取时间15 min、相比(O/A) 1：1、P507浓度20%(v/v)的优化条件下，钒和铁的单级萃取率分别为70%和5%. 采用硫酸作为反萃剂，在反萃温度30°C、反萃时间12 min、相比(O/A) 4：1、硫酸浓度368 g/L的优化条件下，钒和铁的单级反萃率分别为接近100%和3%. 在经过一级萃取和反萃后，得到的反萃液含V(IV) 18.62 g/L 和Fe(II) 0.37 g/L，显示出良好的钒与铁分离效果.同时，钒与铝、钙、镁、锰等杂质也有良好的分离效果.

关键词: 溶剂萃取分离, 钒, 铁, 盐酸浸出液, 萃取剂P507

Abstract: The separation of vanadium (IV) from iron (II) in hydrochloric acid leaching solution, which contained low concentration of vanadium (IV), high concentration of iron (II), and many kinds of impurities was investigated by solvent extraction with 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (P507). Under the optimal extraction conditions, i.e., initial pH of leaching solution of 0-0.6, extraction temperature of 30°C, extraction time of 15 min, P507 concentration(v/v) of 20%, and phase ratio (O/A) of 1:1, the extraction of vanadium (IV) and iron (II) was 70% and 5% in a single step. The sulfuric acid solution was used as the stripping agent. Under the optimal stripping conditions, i.e., stripping time of 12 min, stripping temperature of 30°C, phase ratio (O/A) of 4:1, and H2SO4 concentration of 368 g/L, nearly 100% of vanadium (IV) and 3% of iron (II) was stripped in a single step. Through one step extraction and stripping, a loaded stripping solution containing vanadium (IV) of 18.62 g/L and iron (II) of 0.37 g/L was obtained, showing a good separation of vanadium (IV) from iron (II). The results showed that vanadium (IV) could be also separated from other impurities such as aluminum, calcium, magnesium, and manganese.

Key words: Solvent extraction separation, Vanadium, Iron, Hydrochloric acid leaching solution, Extractant P507