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Method for extracting and separating vanadium from chromium by using three-phase system

A technology of three-phase system and two-phase system, applied in the field of chemical hydrometallurgy

Inactive Publication Date: 2012-07-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The organic upper phase uses an acidic organic extractant

Method used

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  • Method for extracting and separating vanadium from chromium by using three-phase system
  • Method for extracting and separating vanadium from chromium by using three-phase system
  • Method for extracting and separating vanadium from chromium by using three-phase system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take 10ml of vanadium-chromium-containing aqueous solution, the concentrations of V(V) and Cr(IV) are both 200mg / L, and the acidity pH is 2.0, add 3g of ammonium sulfate and 3g of polyethylene glycol 2000 respectively, vortex to dissolve and mix, add mass volume Percentage of 10% P204-n-hexane organic phase 10ml, shaker for 10 minutes, stand still for phase separation, balance the acidity pH e It is 2.8, and the analysis results show that the extraction rate of vanadium on the organic surface is 70%, while the extraction rate of hexavalent chromium on the polymer is 80%. Calculations show that after primary separation, the separation factor of vanadium and chromium between the upper phase and the middle phase is 38.

Embodiment 2

[0043] Take 90ml of vanadium-chromium-containing aqueous solution, the concentration of V(V) is 800mg / L, the concentration of Cr(IV) is 10mg / L, the acidity and pH are 3.5, add 8g of potassium sulfate and 2g of polyether 5-HB-5100 respectively, and vortex to dissolve After mixing, add 50ml of Cyanex272-n-heptane organic phase with a mass volume percentage of 50%, vibrate with an oscillator for 15 minutes, let stand to separate the phases, and balance the acidity and pH e It is 3.9, and the analysis results show that the extraction rate of organic relative vanadium is 67%, while the extraction rate of polymer relative to hexavalent chromium is 84%. Calculations show that after primary separation, the separation factor of vanadium and chromium between the upper phase and the middle phase is 81.

Embodiment 3

[0045] Take 65ml of vanadium-chromium-containing aqueous solution, the concentration of V(V) is 10mg / L, the concentration of Cr(IV) is 20mg / L, the acidity and pH are 5, add 30g of sodium sulfate and 5g of polyvinyl alcohol respectively, vortex to dissolve and mix, then add 30ml of P507-kerosene organic phase with a mass volume percentage of 40%, oscillating with an oscillator for 8 minutes, standing still for phase separation, and balancing the acidity pH e It is 5.1, and the analysis results show that the extraction rate of organic relative vanadium is 70%, while the extraction rate of polymer relative to hexavalent chromium is 92%. Calculations show that after primary separation, the separation factor of vanadium and chromium between the upper phase and the middle phase is 92.

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Abstract

The invention relates to a method for extracting and separating vanadium from chromium by using liquid-liquid-liquid three-phase system, which comprises the following steps of: adding phase forming salt and a polymer in vanadium and chromium solution and forming an aqueous two-phase system after the phase forming salt and the polymer are dissolved; and then adding an organic phase in the formed aqueous two-phase system, vibrating and carrying out phase separation to obtain the three-phase system. Compared with the prior art, the method has the advantages that: (1) the separation coefficient of vanadium from chromium is large, so that the effective separation of vanadium from chromium can be realized in one step; (2) the utilization rate of vanadium and chromium is high, so that the resource waste is effectively reduced; (3) the method is good in physical phenomenon, short in process flow, simple and convenient in operation, low in cost, less in energy consumption and good in control, and as long as the effective separation of vanadium from the chromium can be realized, the production process for further recovering vanadium and chromium is mature.

Description

technical field [0001] The invention relates to the field of chemical hydrometallurgy, in particular to a method for extracting and separating vanadium and chromium by using a liquid-liquid-liquid three-phase system. Background technique [0002] Vanadium-titanium magnetite is the main mineral resource of vanadium and chromium in my country, with huge reserves. my country's proven reserves exceed 10 billion tons, and prospective reserves reach more than 30 billion tons. They are mainly distributed in Panxi, Sichuan and Chengde, Hebei. Extracting vanadium from vanadium-titanium magnetite mainly adopts vanadium extraction method from vanadium slag. The vanadium extraction method from vanadium slag is characterized by combining vanadium extraction with steel production. The basic process of this process is to process vanadium-titanium magnetite in blast furnace or electric furnace to obtain vanadium-containing molten iron, and then make vanadium enter vanadium slag and separat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B34/32C22B3/26
CPCY02P10/20
Inventor 赵君梅王福春刘会洲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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