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Method for preparing vanadyl sulfate

A technology of vanadyl sulfate and vanadium clinker, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., can solve the problems of difficult treatment of ammonium-containing acidic wastewater, long process flow, low yield, etc., to avoid pollution and The effect of manpower and material consumption, simplified operation process and high vanadium yield

Active Publication Date: 2015-01-28
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] In the process of acidic ammonium salt precipitation of ammonium metavanadate (repeated recrystallization), it is necessary to heat to above 98°C for precipitation, resulting in a large amount of ammonium-containing acidic wastewater that is difficult to treat. In addition, a large amount of potassium and sodium ions contained in the vanadium purification solution will Bringing into the product has a great impact on the purity of the product
At present, there is no large-scale industrial production of high-purity powdery vanadium pentoxide at home and abroad, and this recrystallization method is basically used for small-scale production. The problems of long process flow, low yield, high cost, and large discharge of waste gas and wastewater are difficult to solve.

Method used

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  • Method for preparing vanadyl sulfate
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  • Method for preparing vanadyl sulfate

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Take 200ml of vanadium extraction resin, put it into a plexiglass fixed-bed exchange column of Φ22mm×800mm, and the height of the resin layer is about 526mm. Wash the resin downstream with a small amount of deionized water until the effluent is clear. Accurately measure 600ml of vanadium stock solution, flow through the fixed bed at a speed of 400ml / hour, collect the effluent, which is marked as the adsorption tail liquid, and accurately record the volume of the solution, and wash the vanadium-loaded resin with a small amount of deionized water.

[0033] Take 600ml of the prepared reducing desorbent to desorb the vanadium-loaded resin. The reducing desorbent composition is: 2%H 2 SO 3 +4%H 2 SO 4 The mixed solution flows through the fixed bed at a speed of 200ml / hour, collects the effluent, and desorbs the solution to become blue high-purity VOSO 4 solution. After desorption, wash the resin with a small amount of deionized water, and then enter the next cycle to a...

Embodiment 2

[0041] Take 200ml of resin and put it into a Φ22mm×800mm plexiglass fixed bed exchange column, the height of the resin layer is about 526mm. Wash the resin downstream with a small amount of deionized water until the effluent is clear. Accurately measure 600ml of vanadium stock solution, flow through the fixed bed at a speed of 600ml / hour, collect the effluent, which is marked as the adsorption tail liquid, and accurately record the volume of the solution, and wash the vanadium-loaded resin with a small amount of deionized water.

[0042] Take 600ml of the prepared reducing desorbent to desorb the vanadium-loaded resin. The reducing desorbent consists of: 5% H 2 SO 3 +10%H 2 SO 4 The mixed solution flows through the fixed bed at a speed of 200ml / hour, collects the effluent, and desorbs the solution to become blue VOSO 4 solution. The effluent is marked as a qualified desorption solution, and the volume of the solution is accurately recorded. After desorption, the resin is...

Embodiment 3

[0050] Take 200ml of resin and put it into a Φ22mm×800mm plexiglass fixed bed exchange column, the height of the resin layer is about 526mm. Wash the resin downstream with a small amount of deionized water until the effluent is clear. Accurately measure 600ml of vanadium stock solution, flow through the fixed bed at a speed of 400ml / hour, collect the effluent, mark the effluent as adsorption tail liquid, and accurately record the volume of the solution, wash the vanadium-loaded resin with a small amount of deionized water .

[0051] Take 600ml of the prepared reducing desorbent to desorb the vanadium-loaded resin. The reducing desorbent composition is: 8%H 2 SO 3 +15%H 2 SO 4 The mixed solution flows through the fixed bed at a speed of 200ml / hour, collects the effluent, and the desorbed solution is VOSO 4 solution. The effluent is marked as a qualified desorption solution, and the volume of the solution is accurately recorded. After desorption, wash the resin with a sm...

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Abstract

The invention provides a method for preparing vanadyl sulfate. According to the method, a technical process that ion exchange resin is adopted to selectively adsorb vanadium and reduce and desorb vanadium so as to directly prepare vanadyl sulfate is adopted, so that a middle process in which powder high-purity vanadium pentoxide is prepared is canceled. In addition, as the decontamination process is evolved into direct selective pure vanadium extraction, contamination and the labor and material consumption in the decontamination process are avoided, the operation procedure is greatly simplified. Compared with a conventional vanadyl sulfate preparation process, the method has the advantages of short procedure, high vanadium yield, low cost, no waste discharge and the like.

Description

technical field [0001] The invention relates to a brand-new technical method for directly preparing vanadyl sulfate from a vanadium solution by using an ion exchange resin, in particular to a method for preparing vanadyl sulfate electrolyte and vanadyl sulfate crystals used in the electrolyte of an all-vanadium ion flow battery. Background technique [0002] Vanadium battery is the most advanced and highly efficient reversible fuel cell in the world today. Compared with other energy storage technologies, vanadium battery has outstanding advantages such as long service life, large scale, high safety and reliability, and has become the first choice for large-scale energy storage. One of the preferred technologies. In 2012, the energy storage technology development plan formulated by the United States has listed all-vanadium solution flow batteries in the first place. [0003] Vanadium batteries have extremely good application prospects in wind power and photovoltaic power gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00
CPCC01G31/00C01P2006/80
Inventor 周祥友苗强李培佑占先进常华李玲刘克忠晋心翠王朝晖贾怡晗刘健孟凡奎王扬陈强苑海涛侯录贾秀敏封宇刘剑亭裴庆文曹长山
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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