Production method of battery-grade high-purity manganese sulfate

A production method and technology of manganese sulfate, applied in manganese sulfate and other directions, can solve the problems of large consumption of impurity-removing agents, reduce production costs, and a large amount of heat energy, and achieve the effects of controllable product quality, low comprehensive cost, and high fluorine utilization rate.

Inactive Publication Date: 2019-05-03
赵永阳 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Purification of calcium, magnesium and potassium and sodium in the prior art is mainly through precipitation or multiple recrystallization to obtain qualified products. These methods need to strictly control the

Method used

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  • Production method of battery-grade high-purity manganese sulfate
  • Production method of battery-grade high-purity manganese sulfate

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Embodiment 1

[0028] The present embodiment provides a kind of production method of battery grade high-purity manganese sulfate, comprises the following steps:

[0029] a. Dissolve the ordinary manganese sulfate particles containing impurities in the manganese sulfate compound solution from the cheap manganese sulfate factory, adjust the manganese sulfate aqueous solution with a concentration of 300g / L, adjust the pH value to 1.5, heat the solution to above 90°C, and add Ferric sulfate and barium sulfide were stirred for 1.5h and then filtered to obtain filtrate A. Added ferric sulfate in step a, ferric sulfate and the potassium ion in the manganese sulfate aqueous solution generate jarosite precipitation and remove the impurity potassium in the manganese sulfate aqueous solution, and the sodium ions in the ferric sulfate and the manganese sulfate aqueous solution generate yellow sodium iron vanadium Precipitate and remove the impurity sodium in the manganese sulfate aqueous solution; Added...

Embodiment 2

[0037] The present embodiment provides a kind of production method of battery grade high-purity manganese sulfate, comprises the following steps:

[0038] a. Dissolve the ordinary manganese sulfate particles containing impurities in the manganese sulfate compound solution from the cheap manganese sulfate factory, adjust the manganese sulfate aqueous solution with a concentration of 350g / L, adjust the pH value to 1.5, heat the solution to above 90°C, and add Ferric sulfate and barium sulfide were stirred for 1.5h and then filtered to obtain filtrate A. Added ferric sulfate in step a, ferric sulfate and the potassium ion in the manganese sulfate aqueous solution generate jarosite precipitation and remove the impurity potassium in the manganese sulfate aqueous solution, and the sodium ions in the ferric sulfate and the manganese sulfate aqueous solution generate yellow sodium iron vanadium Precipitate and remove the impurity sodium in the manganese sulfate aqueous solution; Added...

Embodiment 3

[0046] The present embodiment provides a kind of production method of battery grade high-purity manganese sulfate, comprises the following steps:

[0047] a. Dissolve the ordinary manganese sulfate particles containing impurities in the manganese sulfate compound solution from the cheap manganese sulfate factory, adjust the manganese sulfate aqueous solution with a concentration of 400g / L, adjust the pH value to 1.5, heat the solution to above 90°C, and add Ferric sulfate and barium sulfide were stirred for 1.5h and then filtered to obtain filtrate A. Added ferric sulfate in step a, ferric sulfate and the potassium ion in the manganese sulfate aqueous solution generate jarosite precipitation and remove the impurity potassium in the manganese sulfate aqueous solution, and the sodium ions in the ferric sulfate and the manganese sulfate aqueous solution generate yellow sodium iron vanadium Precipitate and remove the impurity sodium in the manganese sulfate aqueous solution; Added...

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Abstract

The invention belongs to the technical field of chemical production, and discloses a production method of battery-grade high-purity manganese sulfate. Impurities of manganese sulfate are removed by adopting a chemical precipitation method. The production method comprises the following steps: step one, adding a ferric salt for generating jarosite and sodium jarosite to remove potassium-sodium impurities, and meanwhile, adding a vulcanizing agent to remove heavy metal ions; step two, adding a fluorinating agent for generating calcium fluoride and magnesium fluoride precipitates to remove calcium-magnesium impurities; step three, carrying out concentrating crystallization to obtain a high-fluorine manganese sulfate crystal; step four, adding a fluorine removal agent into the high-fluorine manganese sulfate to remove fluorine ions, and then carrying out filtering to obtain a high-purity manganese sulfate clear solution; and step five, carrying out concentrating crystallization on the high-purity manganese sulfate clear solution, and carrying out drying to obtain the high-purity manganese sulfate crystal. The high-purity manganese sulfate is produced by the production method, and a proper amount of chemical reagents are added to remove the impurities in the production process. The operation is convenient, controllability and reproducibility of quality are high, and product quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a production method of battery-grade high-purity manganese sulfate. Background technique [0002] Manganese sulfate is a traditional manganese salt product with a wide range of uses. At present, the domestic manganese sulfate production process mainly uses pyrolusite as raw material, and is divided into two reduction leaching technologies: carbon fire reduction and wet reduction acid leaching, and then simple oxidation-hydration to remove iron, sulfide to remove heavy metals, filter, Static precipitation, solution crystallization, centrifugal dehydration and drying, three grades of manganese sulfate products of industrial grade, feed grade or boutique grade are obtained, which are used in fields such as chemical fertilizers, feed, paint, and pesticides. In recent years, with the development of new energy lithium manganese oxide battery technology at home ...

Claims

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Application Information

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IPC IPC(8): C01G45/10
Inventor 赵永阳梁洲廖福良
Owner 赵永阳
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