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Separation of V(V) and Cr(VI) in leaching solution using annular centrifugal contactors
Jing, Xiaohua1,2; Ning, Pengge1; Cao, Hongbin1; Sun, Zhi1; Wang, Jianyou2

The effective V(V) and Cr(VI) separation is very difficult due to their similarity in physiochemical properties. In this research, almost completely separation of V(V) and Cr(VI) with primary amine N1923 was firstly demonstrated by employing multistage countercurrent extraction (MCE) with annular centrifugal contactors (ACCs). The optimum operation conditions of single-stage extraction with ACC were determined by systematic experiments, and best conditions of the rotor speed, the flow rate and the flow ratio of organic phase to aqueous phase were obtained. The loaded-organic phase can be reused for extraction process after stripping with ammonia/sodium hydroxide. Vanadium, in the leaching/aqueous solution with the initial pH of 6.1, was reached to extraction equilibrium by three-stage countercurrent extraction with ACCs. V(V) and Cr(VI) were separated through 21 stages of countercurrent extraction with ACCs. 95.1% of vanadium and almost none of chromium were extracted, with the separation factor approaching infinity. Through the mechanism of hydrogen bond association and different species of two metals in the leaching/aqueous solution, an in-depth analysis to correlate the results obtained and the chemical reactions with ACCs has been made in order to establish a firm conclusion with aim of the guidance in industrial application.(C) 2017 Elsevier B.V. All rights reserved.

KeywordAnnular Centrifugal Contactors Primary Amine Lk-n21 Separation Factor v(v) And Cr(Vi) Multistage Countercurrent Extraction
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordDrop-size Distributions ; Bearing Vanadium Slag ; Solvent-extraction ; Enantioselective Extraction ; Acid Enantiomers ; Primary Amine ; Chromium ; Simulation ; Performance ; Reduction
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
Funding OrganizationNational Key Technology Support Program of China(2015BAB02B05) ; National Natural Science Foundation(51425405)
WOS IDWOS:000395212300038
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
2.Nankai Univ, Coll Environm Sci & Engn, Tianjin 300350, Peoples R China
Recommended Citation
GB/T 7714
Jing, Xiaohua,Ning, Pengge,Cao, Hongbin,et al. Separation of V(V) and Cr(VI) in leaching solution using annular centrifugal contactors[J]. CHEMICAL ENGINEERING JOURNAL,2017,315:373-381.
APA Jing, Xiaohua,Ning, Pengge,Cao, Hongbin,Sun, Zhi,&Wang, Jianyou.(2017).Separation of V(V) and Cr(VI) in leaching solution using annular centrifugal contactors.CHEMICAL ENGINEERING JOURNAL,315,373-381.
MLA Jing, Xiaohua,et al."Separation of V(V) and Cr(VI) in leaching solution using annular centrifugal contactors".CHEMICAL ENGINEERING JOURNAL 315(2017):373-381.
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