Method for preparing high-purity manganese sulfate solution with low cost

A manganese sulfate solution, low-cost technology, applied in the preparation of manganese sulfate, manganese compounds, etc., can solve problems such as vacancy of technical achievements, achieve the effects of reducing production costs, improving resource utilization, and high added value

Active Publication Date: 2017-12-01
广东芳源新材料集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In summary, there is still a vacancy in the technical achievements of separating impurities Cu, Ca, Al, Zn, and Cd from raw manganese liquid at low cost and preparing high-purity manganese sulfate liquid

Method used

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  • Method for preparing high-purity manganese sulfate solution with low cost

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Effect test

Embodiment 1

[0039] A method for preparing high-purity manganese sulfate solution at low cost, comprising the steps of:

[0040] (1) Copper removal: Carry out copper extraction to raw material manganese liquid, obtain the raw material manganese liquid after copper removal of Cu≤0.2g / L;

[0041] (2) adjust the pH value, adopt manganese carbonate slurry to adjust the raw material manganese liquid pH value after copper removal to be 1.5~5.0;

[0042] (3) Saponification: Saponify the extractant P204 with NaOH to obtain the P204 sodium soap organic after saponification;

[0043] (4) transfer manganese soap: the obtained P204 sodium soap is organically mixed with MnSO 4 Liquid is carried out to manganese saponification, obtains the P204 manganese soap organic after saponification;

[0044] (5) Extraction and separation of Mn and Ca: the manganese soap that will obtain P204 is organically carried out multi-stage countercurrent extraction to the raw material manganese liquid obtained in step (2)...

Embodiment 2

[0047] A method for preparing high-purity manganese sulfate solution at low cost, comprising the steps of:

[0048] (1) Copper removal: Carry out copper extraction to raw material manganese liquid, obtain the raw material manganese liquid after copper removal of Cu≤0.2g / L;

[0049] (2) adjust the pH value, adopt the manganese hydroxide slurry to adjust the raw material manganese liquid pH value after copper removal to be 1.5~5.0;

[0050] (3) Saponification: use Na 2 CO 3 The liquid carries out saponification to extractant P204, obtains the P204 sodium soap organic after saponification;

[0051] (4) transfer manganese soap: the obtained P204 sodium soap is organically mixed with MnCl 2 Solution is carried out to manganese saponification, obtains the P204 manganese soap organic after saponification;

[0052] (5) Extraction and separation of Mn and Ca: the obtained P204 manganese soap is organically carried out to multistage countercurrent extraction of the raw material mang...

Embodiment 3

[0055] A method for preparing high-purity manganese sulfate solution at low cost, comprising the steps of:

[0056] (1) Copper removal: Carry out copper extraction to raw material manganese liquid, obtain the raw material manganese liquid after copper removal of Cu≤0.2g / L;

[0057] (2) adjust the pH value, adopt manganese carbonate to adjust the raw material manganese liquid pH value after copper removal to be 1.5~5.0;

[0058] (3) Saponification: use KOH or K 2 CO 3 Carry out saponification to extractant P204, obtain the P204 potassium soap organic after saponification;

[0059] (4) transfer manganese soap: the potassium soap of the obtained P204 is organically mixed with MnSO 4 Liquid is carried out to manganese saponification, obtains the P204 manganese soap organic after saponification;

[0060] (5) Extraction and separation of Mn and Ca: the obtained P204 manganese soap is organically carried out to multistage countercurrent extraction of the raw material manganese li...

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Abstract

The invention discloses a method for preparing a high-purity manganese sulfate solution with low cost. The method comprises the following steps: (1) copper removal: obtaining copper-removed raw liquid manganese of which Cu is less than or equal to 0.2g/L; (2) pH value adjustment: adjusting the pH value of the copper-removed raw liquid manganese to be 1.5 to 5.0; (3) saponification: saponifying an extraction agent by using NaOH, Na2CO3, KOH, K2CO3 or ammonium hydroxide, so as to obtain sodium salt, potassium salt or ammonium salt containing the extraction agent; (4) manganese transforming saponification; (5) Mn and Ca extraction separation: making Ca in the raw liquid manganese enter an organic phase to be separated from Mn, and making all or most of Cu, Al, Zn and Cd enter the organic phase, so as to obtain extraction raffinate namely decalcified liquid manganese of which Ca is less than or equal to 5ppm; (6) deep purification: adding Na2S, NaHS, K2S, KHS or (NH4)2S into the decalcified liquid manganese, adjusting the pH value to be 4.0 to 6.0, and performing solid-liquid separation, so as to obtain a high-purity MnSO4 solution satisfying production of a positive precursor of a lithium ion battery.

Description

technical field [0001] The invention relates to a purification and preparation technology of a high-purity manganese sulfate solution, in particular to a method for preparing a high-purity manganese sulfate solution at low cost from a sulfate mixed solution of impurity ions such as Mn, Cu, Ca, Al, Zn and Cd. Background technique [0002] Nickel-cobalt-manganese ternary cathode material is a new type of lithium-ion battery cathode material, which has the advantages of high capacity, good thermal stability, and low price. It can be widely used in small lithium batteries and lithium-ion power batteries. It is a very close to The product of lithium cobalt oxide is much more cost-effective than lithium cobalt oxide, and its capacity is 10-20% higher than that of lithium cobalt oxide. It is one of the new battery materials most likely to replace lithium cobalt oxide, and is called the third-generation lithium-ion battery. Positive electrode materials, the annual domestic demand fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/003C01G45/10
Inventor 吴芳张阳龙全安傅建国罗爱平郑明臻张杰磊
Owner 广东芳源新材料集团股份有限公司
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