Highly efficient and selective removal of vanadium from tungstate solutions by microbubble floating-extraction

doi:10.1007/s11705-022-2235-2

Frontiers of Chemical Science and Engineering

2023, Vol. 17

Issue (5): 581-593 https://doi.org/10.1007/s11705-022-2235-2

本期目录

Highly efficient and selective removal of vanadium from tungstate solutions by microbubble floating-extraction

Hanyu Wang, Shengpeng Su, Yanfang Huang, Bingbing Liu, Hu Sun, Guihong Han(

)

School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China

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Abstract：

Selective separation of dissolved tungsten and vanadium is of great significance for the utilization of the secondary resources of these elements. In this work, selective removal of vanadium from tungstate solutions via microbubble floating-extraction was systematically investigated. The results indicated that vanadium can be more easily mineralized over tungsten from tungstate solutions using methyl trioctyl ammonium chloride as mineralization reagent under weak alkaline conditions. Owing to the higher bubble and interface mass transfer rates, high-efficiency enrichment and deep separation of vanadium could be achieved easily. Additionally, the deep recovery of tungsten and vanadium from the floated organic phase could be easily realized using a mixed solution of sodium hydroxide and sodium chloride as stripping agents. The separation mechanism mainly included the formation of hydrophobic complexes, their attachment on the surface of rising bubbles, and their mass transfer at the oil–water interface. Under the optimal conditions, the removal efficiency of vanadium reached 98.5% with tungsten loss below 8% after two-stage microbubble floating-extraction. Therefore, the microbubble floating-extraction could be an efficient approach for separating selectively vanadium from tungstate solutions, exhibiting outstanding advantages of high separation efficiency and low consumption of organic solvents.

Key words： tungsten vanadium selective separation reagent mineralization microbubble floating-extraction

收稿日期: 2022-06-03 出版日期: 2023-04-28

Corresponding Author(s): Guihong Han

引用本文:

. [J]. Frontiers of Chemical Science and Engineering, 2023, 17(5): 581-593.
Hanyu Wang, Shengpeng Su, Yanfang Huang, Bingbing Liu, Hu Sun, Guihong Han. Highly efficient and selective removal of vanadium from tungstate solutions by microbubble floating-extraction. Front. Chem. Sci. Eng., 2023, 17(5): 581-593.

链接本文:

https://academic.hep.com.cn/fcse/CN/10.1007/s11705-022-2235-2
https://academic.hep.com.cn/fcse/CN/Y2023/V17/I5/581

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Fig.2

Index	Formula	Nomenclature
Mineralization efficiency	$M = 1 ? C M C F × 100 %$	$C F$ , $C M$ , $C R$ , $C S$ , and $C F L$ represent the concentrations of tungsten and vanadium in the feed, supernatant, raffinate, stripping solution, and floated organic phases; $V F L$ and $V S$ are the volumes of the floated organic phase and stripping solution, respectively; D_V and D_W are the distribution coefficient of V and W, respectively.
Flotation efficiency	$F = (1 ? C R C F) × 100 %$
Stripping efficiency	$S T = C S × V S C F L × V F L × 100 %$
Distribution coefficient	$D = C F L C R$
Separation factor	$β V, W = D V D W$

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