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Preparation method of manganese sulfate and manganese sulfate product prepared by same

A manganese sulfate and product technology, applied in manganese sulfate and other directions, can solve the problems of long process flow and complex process, and achieve the effects of high product purity, simplified preparation process and less impurities

Active Publication Date: 2014-02-12
GUIZHOU REDSTAR DEVING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in this process, manganese sulfate is obtained by adding manganese sulfide to filter and remove impurities, but it is made of medium and low-grade MnO 2 The reaction of mineral powder and sulfur-containing flue gas as raw materials, and the process is complicated, the obtained MnSO 4 ·H 2 O purity is only at most only 98.77%
[0006] The above-mentioned preparation routes have the disadvantages of long process flow and complex process

Method used

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  • Preparation method of manganese sulfate and manganese sulfate product prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] First add 4000 liters of deionized water into a 5000 liters open glass-lined reaction pot, add 500 kg of manganese metal with a purity of 99% under stirring, slowly add 98% industrial sulfuric acid to react to a pH value of 3.5, and measure the lead content to be 14.76 kg. Add 40 kg of 60% MnS, stir and react at 87°C for 5 hours, press filter to separate, recover valuable elements from the filter cake, and clarify the filtrate to proceed to the next step.

[0054] Add 27.5% industrial hydrogen peroxide to the above filtrate at a rate of 2.5L per cubic meter, stir for 15 minutes, heat to boiling, and maintain slight boiling for 30 minutes, stop heating, separate solid and liquid, discard the filter residue, and evaporate the clarified filtrate to obtain high-purity Manganese sulfate sample 1 # .

Embodiment 2

[0056] First add 4000 liters of deionized water to a 5000 liter open glass-lined reaction pot, add 600 kg of manganese metal with a purity of 99% under stirring, slowly add 98% industrial sulfuric acid to react to a pH value of 4.0, and measure the lead content to be 17.20 kg. Add 40 kg of 60% MnS, stir and react at 85°C for 5.5 hours, press filter to separate, recover valuable elements from the filter cake, and clarify the filtrate to proceed to the next step.

[0057] Add 27.5% industrial hydrogen peroxide to the above filtrate at a rate of 2.5L per cubic meter, stir for 15 minutes, heat to boiling, and maintain slight boiling for 30 minutes, stop heating, separate solid and liquid, discard the filter residue, and evaporate the clarified filtrate to obtain high-purity Manganese sulfate sample 2 # .

Embodiment 3

[0059] First add 4000 liters of deionized water into a 5000 liter open glass-lined reaction pot, add 650 kg of manganese metal with a purity of 99% under stirring, slowly add 98% industrial sulfuric acid to react to a pH value of 3.5, and measure the lead content to be 18.59 kg. Add 40 kg of 60% MnS, stir and react at 87°C for 5 hours, press filter to separate, recover valuable elements from the filter cake, and clarify the filtrate to proceed to the next step.

[0060] Add 27.5% industrial hydrogen peroxide to the above filtrate at a rate of 2.5L per cubic meter, stir for 15 minutes, heat to boiling, and maintain slight boiling for 30 minutes, stop heating, separate solid and liquid, discard the filter residue, and evaporate the clarified filtrate to obtain high-purity Manganese sulfate sample 3 # .

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Abstract

The invention relates to a preparation method of manganese sulfate and a manganese sulfate product prepared by the same. The method comprises the following steps: A. adding metal manganese into deionized water, and slowly adding sulfuric acid into the mixture to react until the pH value reaches 3.5-4.0, thereby obtaining a solution; B. adding excessive manganese sulfide relative to impurity content into the solution obtained in the step A, stirring to react at 70-100 DEG C for 4-6 hours, and carrying out solid-liquid separation; C. adding excessive hydrogen peroxide into the solution obtained by the solid-liquid separation in the step B, uniformly stirring, heating to a boiling state, and carrying out solid-liquid separation; and D. evaporating the solution obtained by solid-liquid separation in the step C to obtain the manganese sulfate. The preparation method provided by the invention optimizes and simplifies the preparation technique of high-purity manganese sulfate. The high-purity manganese sulfate product prepared by the method provided by the invention contains fewer impurities, and especially the content of potassium, sodium and other impurities which are difficult to remove is nearly down to 10ppm.

Description

technical field [0001] The invention relates to the field of preparation of inorganic fine chemical products, in particular to a method for preparing manganese sulfate and a manganese sulfate product prepared by the method. Background technique [0002] High-purity manganese sulfate can be used to prepare manganese-based positive electrode materials for lithium-ion batteries. It is one of the raw materials for the ternary precursor (nickel-cobalt-manganese compound) of positive electrode materials. Large-scale preparation of high-purity manganese sulfate with low process cost has become a hot spot in the industry. [0003] At present, the preparation method of high-purity manganese sulfate mainly uses ore as the preparation process route of the starting material. [0004] CN101704554A adopts the method of using reducing sulfide to react with manganese dioxide ore, and the solid phase obtained by pressure filtration and separation is then reacted with sulfuric acid to pH=3-5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/10
Inventor 姜志光华东
Owner GUIZHOU REDSTAR DEVING
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