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Method for removing fluorine and silicon ions from nickel cobalt manganese sulfate solution

A nickel sulfate and silicon ion technology, applied in nickel sulfate, manganese sulfate, cobalt sulfate, etc., can solve the problems of non-metallic impurity removal methods that have not been reported, and achieve easy industrial production, good impurity removal effect, and low production cost Effect

Inactive Publication Date: 2017-05-31
GANFENG LITHIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many reports on the removal of cationic metal impurities in nickel-cobalt-manganese mixed solution, but there are no reports on the removal of non-metallic impurities such as fluorine and silicon.

Method used

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  • Method for removing fluorine and silicon ions from nickel cobalt manganese sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A Dilution: Take 100L nickel-cobalt-manganese sulfate solution and dilute it with water until the total amount of nickel, cobalt and manganese ions is 30g / L, F- is 2g / L, and Si4+ is 0.2g / L;

[0032] B adjust pH: the diluted nickel-cobalt-manganese sulfate solution is adjusted to pH 4 with sulfuric acid to obtain 200L nickel-cobalt-manganese sulfate solution to be extracted;

[0033] C Extraction: The nickel-cobalt-manganese sulfate solution to be extracted obtained in step B is subjected to multistage countercurrent extraction with 400L P507 and sulfonated kerosene mixed extractant, wherein the mixed extractant is composed of 100L P507 organic phosphorus extractant and 300L sulfonated kerosene. The ratio is 2.0, the pH of the aqueous phase is 4.2, and 150L of the extracted aqueous phase and 450L of the extracted organic phase are obtained by separation;

[0034] D washing: rinse the extracted organic phase obtained in step C with 450L pure water;

[0035] E stripping: ...

Embodiment 2

[0038] A Dilution: Take 100L nickel-cobalt-manganese sulfate solution and dilute it with water until the total amount of nickel, cobalt and manganese ions is 60g / L, F- is 5g / L, and Si4+ is 2g / L;

[0039] B adjust pH: the diluted nickel-cobalt-manganese sulfate solution is adjusted to pH 4 with sulfuric acid to obtain 150L nickel-cobalt-manganese sulfate solution to be extracted;

[0040] C Extraction: The nickel-cobalt-manganese sulfate solution to be extracted obtained in step B is subjected to multistage countercurrent extraction with 630L P507 and sulfonated kerosene mixed extractant, wherein the mixed extractant consists of 157.5 L P507 organic phosphorus extractant and 4725 L sulfonated kerosene Composition, the ratio is 4.2, the pH of the aqueous phase is 6.0, and the extracted aqueous phase is 120L, and the extracted oil phase is 660L;

[0041] D washing: rinse the extracted organic phase obtained in step C with 1320L pure water;

[0042] E stripping: the organic phase...

Embodiment 3

[0045] A Dilution: Take 100L nickel-cobalt-manganese sulfate solution and dilute it with water until the total amount of nickel, cobalt and manganese ions is 50g / L, F- is 4g / L, and Si4+ is 1.5g / L;

[0046] B adjust pH: the diluted nickel-cobalt-manganese sulfate solution is adjusted to pH 5 with sulfuric acid to obtain 180L nickel-cobalt-manganese sulfate solution to be extracted;

[0047] C extraction: the nickel-cobalt-manganese sulfate solution to be extracted obtained in step B is subjected to multistage countercurrent extraction with 180L P507 and sulfonated kerosene mixed extractant, wherein the mixed extractant is composed of 45L P507 organic phosphorus extractant and 135 L sulfonated kerosene, The phase ratio is 1.0, the pH of the water phase is 5.0, and 150L of the extracted water phase and 210L of the extracted oil phase are obtained by separation;

[0048] D washing: rinse the extracted organic phase obtained in step C with 315L pure water;

[0049]E stripping: the...

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Abstract

The invention discloses a method for removing fluorine and silicon ions from a nickel cobalt manganese sulfate solution. The method comprises the following process flow: (A) diluting: diluting the nickel cobalt manganese sulfate solution with water; (B) adjusting the pH (Potential of Hydrogen): adjusting the pH of the diluted nickel cobalt manganese sulfate solution to be 4 to 6 with an inorganic acid; (C) extracting: carrying out multi-grade counter-current extraction on the solution with the pH adjusted by the step B by utilizing a mixed extracting agent of P507 and sulfonated kerosene; (D) washing: eluting an extracted organic phase separated in the step C by utilizing pure water; (E) carrying out reverse extraction: carrying out multi-grade counter-current reverse extraction on the washed organic phase with an inorganic acid with the concentration of 2mol / L to 6mol / L; (F) removing oil: standing and layering a reverse extraction water phase obtained by the step E, and removing the oil by utilizing an oil remover to obtain the purified nickel cobalt manganese sulfate solution. The method for removing the fluorine and silicon ions from the nickel cobalt manganese sulfate solution, disclosed by the invention, has the advantages of good impurity removing effect, high recovery rate of valuable metal including nickel, cobalt and manganese, simple process and low production cost, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for removing fluorine and silicon ions with a solution, in particular to a method for removing fluorine and silicon ions with a nickel-cobalt-manganese sulfate solution. Background technique [0002] Because nickel-cobalt-manganese ternary material lithium batteries have the advantages of high specific capacity, good safety, and good cycle stability, they have been widely used in notebook computers, digital equipment, electric bicycles, mobile communications, power tools and other fields. The key technology of nickel-cobalt-manganese ternary cathode materials is the synthesis of ternary precursor materials, which are prepared by chemical co-precipitation method in industry. The key to the preparation process is to obtain high-purity nickel-cobalt-manganese soluble solutions. In addition to nickel, cobalt and manganese elements, requirements The content of other elements is very low, otherwise the properties and morphol...

Claims

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Application Information

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IPC IPC(8): C01G53/10C01G51/10C01G45/10
CPCC01G45/10C01G51/10C01G53/10C01P2004/82C01P2006/80
Inventor 李良彬白有仙章小明谢绍忠高贵彦刘超彭爱平李芳芳刘明
Owner GANFENG LITHIUM CO LTD
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