Recovery of vanadium and chromium from leaching solution of sodium roasting vanadium slag by stepwise separation using amide and EHEHPA

Ying, Ziwen; Huo, Manxing; Wu, Guixuan; Li, Jie; Ju, Yun; Wei, Qifeng; Ren, Xiulian

doi:10.1016/j.seppur.2021.118741

Cited by 43 publications

(7 citation statements)

References 36 publications

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“…The bending vibration peak of P–OH at 1674 cm –1 disappeared after extracting vanadium with P507, where the stretching vibration peak of VO appeared at 931 cm –1 . It indicates that H + in the P–OH group was replaced by VO 2+ during the extraction reaction to form a new group . Furthermore, the bond stretching vibration peak of PO at 1198 cm –1 was weakened to some extent, which indicates that the formation of the new coordination bond of PO⃗V weakened the electron cloud of the group.…”

Section: Resultsmentioning

confidence: 99%

“…It indicates that H + in the P−OH group was replaced by VO 2+ during the extraction reaction to form a new group. 35 Furthermore, the bond stretching vibration peak of P�O at 1198 cm −1 was weakened to some extent, which indicates that the formation of the new coordination bond of P�O ⃗ V weakened the electron cloud of the group. Based on the above research, the extracting mechanism of sulfuric acid with TEHA and N-pentanol, and the extracting characteristics of vanadium with P507, can be shown and are illustrated in Figure 8.…”

Section: Ft-ir Analysis Of Organic Phase and Extraction Mechanismmentioning

confidence: 97%

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Sustainable Selective Recovery of Sulfuric Acid and Vanadium from Acidic Wastewater with Two-Step Solvent Extraction

Zhu

2023

ACS Omega

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A two-stage extraction process was proposed to recover sulfuric acid and vanadium from simulated acid solution and titanium dioxide waste acid (TDWA). Some extractants were compared and studied, in which the enthalpy changes (ΔH) of the extraction process and the extracted complex were analyzed by using thermodynamics. The microscopic characteristics of the loaded organic phase were compared and investigated by infrared spectroscopy (FT-IR), where the extraction mechanism was described. The extraction efficiency of sulfuric acid was more than 99% by three-stage countercurrent extraction with 60% triisooctylamine (TEHA) and 35% N-pentanol, in which ΔH was −61.31 kJ/mol and the extracted complex of H 2 SO 4 •TEHA•2-N-pentanol was obtained. The extraction efficiency of vanadium was above 98% by using 20% bis-2-ethylhexyl phosphate (P507) and 80% sulfonated kerosene, where ΔH was 14.69 kJ/mol and the extracted complex of VO•2A (vanadium as VO 2+ and P507 as HA) was obtained. The stripping efficiencies of sulfuric acid and vanadium were more than 90% and 98%, respectively. The extraction effect of used organic phase after regeneration was equivalent to that of the new organic phase with cycle numbers of less than 10. The real waste acid of TDWA was operated to extract and separate sulfuric acid and vanadium with the same parameters, in which the characteristics of high extraction efficiency and good selectivity were obtained. The technique may provide a new thinking for the separation and recovery of valuable components from TDWA.

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Section: Resultsmentioning

confidence: 99%

Section: Ft-ir Analysis Of Organic Phase and Extraction Mechanismmentioning

confidence: 97%

Sustainable Selective Recovery of Sulfuric Acid and Vanadium from Acidic Wastewater with Two-Step Solvent Extraction

Zhu

2023

ACS Omega

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“…V mainly exists in insoluble spinel as V(III) in VS [6] . Several methods have been developed to extract V from VS including sodium salt roasting-water/acidic leaching [7] , [8] , calcification/lime roasting-acidic leaching [9] , [10] , [11] , non-salt roasting-acidic leaching [12] , manganese roasting-acidic leaching [13] , etc. By roasting at high temperature in air atmosphere, the V(III) in spinel can be fully oxidized, converting stable spinel into the leachable forms such as NaVO 3 , Na 4 V 2 O 7 , CaV 2 O 6 , etc.…”

Section: Introductionmentioning

confidence: 99%

A clean and efficient route for extraction of vanadium from vanadium slag by electro-oxidation combined with ultrasound cavitation

Liu,

Duan,

Cai

et al. 2024

Ultrasonics Sonochemistry

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“…The application scope of vanadium has expanded beyond iron-/steelmaking, military, and medical industries [1][2][3][4] to include functional materials (e.g., nanocomposites), high-performance alloys, and all-vanadium liquid-flow batteries [5][6][7][8][9][10][11][12][13]. In particular, the abovementioned batteries represent a new high-efficiency energy storage technology and energy-development direction, which highlights the strategic importance of vanadium resources [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Short-Process Preparation of High-Purity V2O5 from Shale Acid Leaching Solution via Chlorination

Huang

Zhang

et al. 2023

Processes

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The conventional V2O5 preparation processes include ion exchange, chemical precipitation, solvent extraction, and other processes. Given the long process and complex operation nature of traditional V2O5 production methods, we herein developed a short-process, low-temperature, and convenient operation method of isolating vanadium (in the form of V2O5) from shale acid leaching solution. The acid leaching solution was oxidized with NaClO3 and pH-adjusted with NaOH to form a vanadium-containing precipitate, which was mixed with AlCl3 (V:AlCl3 = 1:5, mol/mol) and roasted for 120 min at 170 °C to afford vanadium oxytrichloride (VOCl3) with a purity of 99.59%. In addition, the vanadium-containing precipitate was mixed with AlCl3 and NaCl (V:AlCl3:NaCl = 3:12:8, mol/mol/mol) and roasted for 120 min at 170 °C to afford VOCl3 with a purity of 99.94%. VOCl3 (purity of 99.94%) was dissolved in ultrapure water, and the solution (32 gvanadium/L) was treated with NH3·H2O (NH3:V = 1.34, mol/mol) at 50 °C for 120 min. The obtained precipitate (vanadium precipitation rate = 99.28%) was roasted at 550 °C for 3 h to afford high-purity vanadium pentoxide (V2O5) with a purity of 99.86%. Compared with the traditional hydrometallurgical method of V2O5 preparation, our method avoided solvent extraction and other undesired processes and the overall process flow is greatly shortened, thus having high practical value.

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Recovery of vanadium and chromium from leaching solution of sodium roasting vanadium slag by stepwise separation using amide and EHEHPA

Cited by 43 publications

References 36 publications

Sustainable Selective Recovery of Sulfuric Acid and Vanadium from Acidic Wastewater with Two-Step Solvent Extraction

Sustainable Selective Recovery of Sulfuric Acid and Vanadium from Acidic Wastewater with Two-Step Solvent Extraction

A clean and efficient route for extraction of vanadium from vanadium slag by electro-oxidation combined with ultrasound cavitation

Short-Process Preparation of High-Purity V2O5 from Shale Acid Leaching Solution via Chlorination

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