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Extraction preparation process of high-purity vanadyl sulfate solution

A vanadyl sulfate solution and a preparation process technology, applied in liquid solution solvent extraction, solvent extraction, countercurrent extraction, etc., can solve the problems of low efficiency, high cost, complicated steps, etc., achieve simple operation process, low cost, and reduce impurities The effect of content

Active Publication Date: 2020-06-16
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to propose a process for the extraction and preparation of a high-purity vanadyl sulfate solution, which can produce high-purity vanadyl sulfate in a long-term, stable and efficient manner, aiming at the problems of complex steps, low efficiency, and high cost in the current vanadyl sulfate purification method. , high concentration of vanadyl sulfate, and simple operation, short cycle and low cost

Method used

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  • Extraction preparation process of high-purity vanadyl sulfate solution

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Embodiment 1

[0042] This embodiment discloses a process for the extraction and preparation of a high-purity vanadyl sulfate solution, such as figure 1 Specifically, the following steps are shown:

[0043]Step (1) Take 1 L of the reducing solution (vanadyl sulfate solution), adjust the pH to 2.35 with calcium hydroxide, and filter, wherein the V content is 87.14 g / L, the K content is 0.5341 g / L, the Na content is 0.8048 g / L, and the Cr content is 87.14 g / L. content of 0.0689g / L, Fe content of 0.1008g / L, Al content of 0.1490g / L, and Ca content of 0.5167g / L; it is mixed with 30% P204+70% sulfonated kerosene for extraction, and the extraction is compared to O / A=2:1, the extraction time is 5min, the two phases are separated to obtain the raffinate and the loaded organic phase; the loaded organic phase is filtered, and 4mol / L sulfuric acid is used for back extraction, and the back extraction ratio O / A=25:3, Obtain vanadyl sulfate solution and stripping organic phase, wherein V content 155.88g / ...

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Abstract

The invention provides an extraction preparation technology of a high purity vanadyl sulfate solution. When a large oil phase / aqueous phase (O / A) ratio is used in the extraction of a low concentrationvanadium solution, a loaded organic phase is not directly reversely extracted, the loaded organic phase is used to extract a high concentration vanadium solution, then the loaded organic phase is reversely extracted, according to the method, vanadium in the high concentration vanadium solution can replace impurities in the loaded organic phase, and the impurity content of strip liquor is effectively reduced. The provided extraction preparation technology can be used to extract vanadium solutions with any concentration, in particular, a vanadium solution with a low concentration.

Description

technical field [0001] The invention relates to hydrometallurgy technology, in particular to an extraction preparation process of a high-purity vanadyl sulfate solution. Background technique [0002] As an energy storage battery, all-vanadium redox flow battery has many advantages, such as good safety performance, long cycle life, high-efficiency energy storage and easy scale-up, etc. It is widely used in wind power generation, photovoltaic power generation, large-scale power emergency systems, power grid peak regulation, distribution Power stations, military power storage, transportation and municipal, communication base stations and other fields have extremely good application prospects. [0003] Vanadyl sulfate is one of the important components of the all-vanadium redox flow battery. In order to ensure the excellent performance of the battery, its purity is highly required. As the application of all-vanadium redox flow batteries becomes more and more extensive, the dema...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04H01M8/18
CPCB01D11/0488B01D2011/002H01M8/188H01M2300/0011Y02E60/50
Inventor 王姝婷邹振龙邸卫利刘欢姜雪莲
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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