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Method for purifying and enriching vanadium from vanadium-containing solution

A solution and enrichment technology, applied in the field of vanadium-containing shale extraction, can solve the problems of high impurity content and loss of vanadium-containing desorption liquid, and achieve the effects of avoiding loss, low impurity iron concentration and simple process

Active Publication Date: 2019-09-17
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fe in the vanadium-containing product obtained by this method can be reduced to below 0.01%, but V loss will be caused in the process of chemically treating the obtained vanadium-rich liquid, and a large amount of impurities are also desorbed during the desorption process.
[0006] In summary, when the existing anion resins are used to treat vanadium-containing solutions, there is a problem that the impurity content in the vanadium-containing desorption solution is relatively high, and the vanadium-containing desorption solution needs to be purified to remove impurities.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for purifying and enriching vanadium from a solution containing vanadium. The concrete steps of the method described in this embodiment are:

[0031] Step 1. Preparation of adsorption stock solution

[0032] Adjust the pH value of the vanadium-containing solution to 1.4-2.0, separate the solid and liquid to obtain the clear liquid and neutralized slag; then add an oxidant to the clear liquid until all V(III) and V(IV) in the clear liquid are oxidized into V(V) to obtain the original adsorption solution.

[0033] Step two, resin adsorption

[0034] The adsorption stock solution flows through the D418 aminophosphoric acid chelating resin installed in the ion exchange column at a flow rate of 1-2.5BV / h, and is adsorbed for 30-50 hours to obtain a loaded resin and an adsorption lower solution.

[0035] The height:diameter ratio of the ion exchange column is (5-13):1.

[0036] Step 3. Loaded resin desorption

[0037] Flow pure water through the loaded resin in ...

Embodiment 2

[0045] A method for purifying and enriching vanadium from a solution containing vanadium. The concrete steps of the method described in this embodiment are:

[0046] Step 1. Preparation of adsorption stock solution

[0047] Adjust the pH value of the vanadium-containing solution to 1.8-2.4, separate the solid and liquid to obtain the clear liquid and neutralized slag; then add an oxidant to the clear liquid until all V(III) and V(IV) in the clear liquid are oxidized into V(V) to obtain the original adsorption solution.

[0048] Step two, resin adsorption

[0049] The adsorption stock solution flows through the D418 aminophosphoric acid chelating resin installed in the ion exchange column at a flow rate of 2-4BV / h, and is adsorbed for 20-35 hours to obtain a loaded resin and an adsorption lower solution.

[0050] The height:diameter ratio of the ion exchange column is (10-18):1.

[0051] Step 3. Loaded resin desorption

[0052] Flow pure water through the loaded resin in t...

Embodiment 3

[0060] A method for purifying and enriching vanadium from a solution containing vanadium. The concrete steps of the method described in this embodiment are:

[0061] Step 1. Preparation of adsorption stock solution

[0062] Adjust the pH value of the vanadium-containing solution to 2.2 to 2.6, separate the solid and liquid to obtain the clear liquid and neutralized slag; then add an oxidant to the clear liquid until all V(III) and V(IV) in the clear liquid are oxidized into V(V) to obtain the original adsorption solution.

[0063] Step two, resin adsorption

[0064] The adsorption stock solution flows through the D418 aminophosphoric acid chelating resin installed in the ion exchange column at a flow rate of 3.5-5BV / h, and is adsorbed for 8-20 hours to obtain a loaded resin and an adsorption lower solution.

[0065] The height:diameter ratio of the ion exchange column is (15-25):1.

[0066] Step 3. Loaded resin desorption

[0067] Flow pure water through the loaded resin ...

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Abstract

The invention relates to a method for purifying and enriching vanadium from a vanadium-containing solution. According to the technical scheme of the method, the pH value of the vanadium-containing solution is adjusted, solid and liquid separation and oxidization treatment are carried out, and an adsorbing stock solution and neutralizing slag are obtained; the adsorbing stock solution flows through D418 phosphoramidic acid chelate resin loaded in an ion exchange column, and loaded resin and adsorbing lower liquid are obtained; pure water flows through the loaded resin in the ion exchange column until the pH value of a flowing-out solution is 6-7; a desorbing agent flows through the loaded resin in the ion exchange column to carry out desorbing; the vanadium-enriched liquid, the rear stage desorbing liquid and desorbed resin are obtained; then a regeneration agent flows through the resin desorbed in the ion exchange column, and then regenerating resin is obtained; and the regenerating resin is returned to the step 2 for circulating and using. The technology is simple, the method for purifying and enriching vanadium from the vanadium-containing solution can effectively separate vanadium from iron, the loss rate of vanadium is small, and impurities in the vanadium-enriched liquid are few.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from vanadium-containing shale. Specifically relates to a method for purifying and enriching vanadium from a vanadium-containing solution. Background technique [0002] At present, the purification and enrichment processes of vanadium-containing solution include solvent extraction method and ion exchange method. Solvent extraction has the advantages of large exchange capacity and fast processing speed. However, there are problems such as emulsification, loss of organic phase and environmental pollution in the extraction process. The ion exchange method has received more and more attention from those skilled in the art because of its simple operation, good purification effect and environmental friendliness. [0003] "A Method for Extracting Vanadium by Ion Exchange from Vanadium-Containing Solution" (CN 101838749 A) ​​patent technology, using sulfuric acid or bisulfate-type anion exc...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B3/24C22B34/22
CPCC22B3/24C22B3/44C22B34/22Y02P10/20
Inventor 张一敏王露瑶薛楠楠黄晶
Owner WUHAN UNIV OF SCI & TECH