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Method for purifying liquid with vanadium and method for preparing ammonium metavanadate and vanadium oxide

A technology of ammonium metavanadate and solution, which is applied in the direction of vanadium oxide, chemical instruments and methods, vanadium compounds, etc., can solve the problems of low grade of vanadium products and the concentration of vanadium solution should not be too high, and achieve low sulfur content, low ammonia nitrogen concentration, The effect of improving product quality

Inactive Publication Date: 2014-12-10
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a purification method that can obtain high-grade vanadium products and purify high-concentration vanadium solutions in order to overcome the problems of low grade vanadium products and the concentration of vanadium solutions that exist in the existing vanadium-containing solution purification methods. Method and preparation method of ammonium metavanadate and vanadium oxide

Method used

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Examples

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preparation example Construction

[0030] The present invention also provides a method for preparing ammonium metavanadate, which comprises purifying a vanadium solution containing vanadium homopolyate ions, and adjusting the pH value of the purified vanadium-containing solution with a pH regulator to be greater than 7.5 After being less than or equal to 9, it is contacted with an ammonium precipitating agent to obtain ammonium metavanadate precipitation. It is characterized in that, the method for purifying the vanadium solution containing the vanadium-containing homopolyacid ion is the above-mentioned method for purifying the vanadium-containing solution.

[0031] The above-mentioned pH adjusting agent can be various pH adjusting agents known in the art, and the present invention is preferably one or more of liquid ammonia, ammonia water, ammonium bicarbonate and ammonium carbonate.

[0032] According to the above-mentioned preparation method of ammonium metavanadate, wherein, the ammonium precipitant can be o...

Embodiment 1

[0040] The vanadium-containing solution produced by the sodium roasting-water leaching process of 2L containing vanadium 40.46g / L, sodium 31.5g / L, potassium 0.64g / L and temperature 40°C was passed through a macroporous strong acid styrene cation with a weight of 1000g. Exchange resin (D001 macroporous strong acid styrene cation exchange resin, exchange capacity ≥ 4.35mmolH + / g, Jiangsu Linhai Resin Technology Co., Ltd.) bed, the contact exchange time between the vanadium-containing solution and the ion exchange resin is 2min, and the vanadium solution after the exchange contains 40.25g / L of vanadium, 1.23g / L of sodium, and 0.01g of potassium. / L, pH=1.05, add ammonia water to the exchanged vanadium solution to adjust pH to 7.5, then add ammonium bicarbonate to carry out vanadium precipitation, control the ammonium addition coefficient (calculated as ammonium sulfate) to be 1, and the vanadium precipitation rate is 77.2%. After filtering and washing the precipitated ammonium m...

Embodiment 2

[0044] Pass 2L of vanadium-containing solution produced by sodium roasting-water leaching process containing vanadium 45.75g / L, sodium 29.3g / L, potassium 0.61g / L and temperature 50℃ through 1000g macroporous strong acid styrene cation exchange resin (D001 macroporous strong acid styrene cation exchange resin, exchange capacity ≥ 4.35mmolH + / g, Jiangsu Linhai Resin Technology Co., Ltd.) bed, the contact exchange time between the vanadium-containing solution and the ion exchange resin is 20min, and the vanadium solution after the exchange contains 45.43g / L of vanadium, 0.51g / L of sodium, and 0.01g of potassium. / L, pH=1.03, add ammonia water to the exchanged vanadium solution to adjust pH to 8.0, then add ammonium bicarbonate to carry out vanadium precipitation, control the ammonium addition coefficient (calculated as ammonium sulfate) to be 1.2, and the vanadium precipitation rate is 92.5%. After filtering and washing the precipitated ammonium metavanadate, it is fired in an e...

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Abstract

The invention provides a method for purifying liquid with vanadium, comprising the following steps: contacting the liquid with vanadium with acid cation exchange resin for ion exchange; and separating the liquid with vanadium after being contacted from the acid cation exchange resin, wherein the liquid with vanadium comprises metal cations and acid group anions of the vanadium. The method can be easily operated, has a few steps and low cost, can be used for processing the high-concentration liquid with vanadium and reducing the combustion of precipitator, so the supernatant liquid of the precipitated vanadium can be directly recycled, the yield of the vanadium is improved, and the grade of the vanadium oxide is improved.

Description

technical field [0001] The invention relates to a purification method of a vanadium-containing solution and a preparation method of ammonium metavanadate and vanadium oxide. Background technique [0002] Vanadium is a rare metal with high melting point. It has many excellent properties and is widely used in metallurgy, chemical industry and other industries. Vanadium is used in the iron and steel industry, adding 0.1% to 0.5% of vanadium and carbon to the steel to form carbides to refine the matrix grains, thereby improving the performance of the steel; the high-value oxides of vanadium are important catalysts in the chemical industry and the petroleum industry ; In addition, in electronics, glass, printing, film, photography and ceramics and other industries, vanadium compounds are also widely used. Moreover, with the rapid development of my country's modernization construction, the demand for vanadium and its compounds is increasing, the scope of use is getting wider and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/04C01G31/02C01G31/00
Inventor 刘学文王永钢李千文彭一村周芳
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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