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. 2022 Feb 2;7(6):5485-5494.
doi: 10.1021/acsomega.1c06827. eCollection 2022 Feb 15.

Efficient Separation and Recovery of Vanadium(V) from Hydrochloric Acid Solution Using N1923 as an Extractant

Xiaobo Zhu  1   2   3 , Yue Liu  1 , Wang Li  1   2
Affiliations

Efficient Separation and Recovery of Vanadium(V) from Hydrochloric Acid Solution Using N1923 as an Extractant

Xiaobo Zhu et al. ACS Omega. .

Abstract

Hydrochloric acid leaching has been widely used in the recovery process of vanadium due to its efficient selectivity. It was necessary to further separate vanadium from hydrochloric acid leaching solution. Four extractants of P204, P507, Cyanex272, and N1923 were compared for extraction of vanadium from a simulated hydrochloric acid solution, and it is concluded that N1923 was an effective extractant suitable for the extraction and separation of V (V) in the medium. The single-stage extraction efficiency of vanadium reached more than 90% with a pH value of 2.0, extraction time of 5 min, and X N1923 of 0.2 at 30 °C. The functional group characteristics of the extraction complex were analyzed by means of an extraction slope method, FT-IR, and 1H NMR to judge the extraction mechanism of vanadium with N1923 as an extractant. The extraction of V (V) by using N1923 was in the coordination form of a molar ratio of 2:1, and the extraction process was an endothermic reaction. The N-H vibrational absorption peak in the -NH2 group still appeared in the loaded N1923, in which the chemical shift of 1H in the primary amine and secondary carbon still existed. This technology was a more efficient process for extraction of vanadium from hydrochloric acid solution.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Effects of extractants and pH value.
Figure 2
Figure 2
Effect of concentration and pH value on pentavalent vanadium morphology.
Figure 3
Figure 3
Microstructure schematic diagram of V(V) in solution.
Figure 4
Figure 4
Structure and 3D diagram of extractants.
Figure 5
Figure 5
Effect of iron impurity ions on vanadium extraction.
Figure 6
Figure 6
Effect of XN1923 on vanadium extraction.
Figure 7
Figure 7
Relationship curve between log D and log[N1923]
Figure 8
Figure 8
Effect of extraction temperature.
Figure 9
Figure 9
Relationship between log D and temperature.
Figure 10
Figure 10
FT-IR of N1923 and loaded N1923.
Figure 11
Figure 11
1H NMR of N1923 and loaded N1923.
Figure 12
Figure 12
Schematic diagram of extraction mechanism of vanadium by using N1923.
Figure 13
Figure 13
Effect of metal impurity ions.
Figure 14
Figure 14
McCable-Thiele diagram of vanadium extraction by using N1923.
See this image and copyright information in PMC

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