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Method for producing vanadyl sulfate from vanadium-containing leachate

A technology of vanadyl sulfate and vanadyl sulfate solution, which is applied in the field of vanadium chemistry, can solve problems such as high production costs and environmental pollution, and achieve the effects of reducing production costs, scientific and reasonable steps, and significant economic benefits

Active Publication Date: 2018-07-27
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to, for the high production cost of the present preparation method of vanadyl sulfate, the problem of polluting the environment, propose a kind of method that produces vanadyl sulfate by vanadium-containing leaching solution, this method can avoid using ammonium salt, effectively reduces sulfuric acid oxygen While reducing the cost of vanadium, it also realizes green production

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  • Method for producing vanadyl sulfate from vanadium-containing leachate

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Embodiment 1

[0041] The present embodiment discloses a method for producing vanadyl sulfate by vanadium-containing leaching solution comprising the following steps:

[0042] Step 1, dissolve the vanadium raw material and filter to obtain 800ml vanadium-containing leachate, V 2 o 5 Concentration 105g / L, add hydrogen peroxide to adjust the color of the solution to colorless and transparent, add sulfuric acid to adjust the pH of the solution to 9;

[0043] Step 2. Add sodium sulfite of 1.5 times the reaction equivalent, add 1g of aluminum sulfate, add sulfuric acid to adjust the pH of the solution to 6, cool the solution to 30°C, stir for 24 hours, obtain a black precipitate, filter to obtain a vanadium-containing solid and filtrate, and return the filtrate to step 1. For dissolving the vanadium raw material, the vanadium-containing solid enters step 3;

[0044] Step 3, according to the material ratio of sulfate radical and vanadium is 1.1, add sulfuric acid and crystallization mother liquo...

Embodiment 2

[0051] The present embodiment discloses a method for producing vanadyl sulfate by vanadium-containing leaching solution comprising the following steps:

[0052] Step 1, dissolve the vanadium raw material and filter to obtain 800ml vanadium-containing leachate, V 2 o 5 Concentration 40g / L, add sodium hypochlorite to adjust the color of the solution to colorless and transparent, add sulfuric acid to adjust the pH of the solution to 7;

[0053] Step 2. Add glucose with a reaction equivalent of 1.1 times, add 0.03g of γ-alumina, add sulfuric acid to adjust the pH of the solution to 8, cool the solution to 60°C, stir for 24 hours, obtain a black precipitate, filter to obtain a vanadium-containing solid and filtrate, and return the filtrate to the step 1 is used to dissolve the vanadium raw material, and the vanadium-containing solid enters step 3;

[0054] Step 3, according to the material ratio of sulfate radical and vanadium is 1.1, add sulfuric acid and crystallization mother ...

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Abstract

The invention provides a method for producing vanadyl sulfate from a vanadium-containing leachate. The method comprises steps as follows: a vanadium material is dissolved and filtered, the vanadium-containing leachate is obtained, the pH is adjusted to 6-10, an oxidizing agent is added to the vanadium-containing leachate, so that vanadium is oxidized to be pentavalent, and a pentavalent vanadium solution is obtained; a reducing agent and an initiator are added to the pentavalent vanadium solution, the pH is adjusted to 6-10, the reaction temperature is 30-100 DEG C, vanadium-containing precipitates obtained through the reaction are subjected to solid-liquid separation, and vanadium-containing solids and filtrate are obtained; the vanadium-containing solids are dissolved in a solvent, filtration is performed, a vanadyl sulfate solution is obtained, wherein the solvent is sulfuric acid; the vanadyl sulfate solution is cooled and crystalized, and a crystallization mother solution and vanadyl sulfate crystals are obtained. The method can avoid use of ammonium salt and realizes green production while the cost of vanadyl sulfate is effectively reduced.

Description

technical field [0001] The invention relates to vanadium chemical technology, in particular to a method for producing vanadyl sulfate from a vanadium-containing leaching solution. Background technique [0002] The all-vanadium redox flow battery is an excellent energy storage battery. The battery has a long service life, low average energy cost during the life span, high reliability, fast charge and discharge, and separation of power and energy units. It is used in photovoltaic power generation and wind power generation. , Peak cutting and valley filling have great development prospects. All-vanadium redox flow battery also has many disadvantages, such as high installation cost, the installation cost of lead-acid battery is 500-600 yuan / kwh, the installation cost of lithium battery is 1500-2000 yuan / kwh, and the installation cost of vanadium battery is as high as 2500-3000 yuan / kwh. The high price of vanadium batteries is a key factor affecting its application. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/06
CPCH01M8/0693Y02E60/50Y02P70/50
Inventor 刘国昌陈彦博宋明明阎成友孟昭扬
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD