Application of heteropolyacid as carrier to removal of trace silicon and phosphorus impurities in nickel solution

A technology of nickel solution and heteropoly acid, applied in the field of hydrometallurgy, can solve the problems of inability to achieve deep desiliconization and increase the burden of impurity removal in subsequent processes, etc.

Active Publication Date: 2021-02-02
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

[0005] The above-mentioned method for removing silicon is mainly aimed at the removal of impurity silicon in other system high-silicon solutions, and the method for deep silicon removal in nickel solution has not been reported yet, and the silicon content in the solution after the above-mentioned method is still 0.2g / L ( 200ppm), this type of method cannot achieve the purpose of deep desiliconization; at the same time, the addition of silicon removal agent in the impurity removal process will introduce other impurity ions into the solution, increasing the burden of impurity removal in subsequent processes

Method used

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  • Application of heteropolyacid as carrier to removal of trace silicon and phosphorus impurities in nickel solution
  • Application of heteropolyacid as carrier to removal of trace silicon and phosphorus impurities in nickel solution
  • Application of heteropolyacid as carrier to removal of trace silicon and phosphorus impurities in nickel solution

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Effect test

Embodiment approach 1

[0139] Add sodium molybdate with 1.5 times the molar content of Si and P heteroelements to the nickel solution, adjust the pH value of the nickel solution to 3.0, stir for 1 hour at room temperature, and then add 10% N235+30% isooctyl alcohol+ 60% kerosene heteropolyacid extractant, the volume ratio of heteropolyacid extractant addition to nickel solution is 1:1, after mixing for 5min, leave to stand for layering, separate and obtain the raffinate (nickel solution) with Si and P impurity content below 1ppm solution) and the organic phase.

Embodiment approach 2

[0141] Add ammonium molybdate with 1.5 times the molar content of Si and P heteroelements to the nickel solution, adjust the pH value of the nickel solution to 4.0, stir for 1 hour under normal temperature conditions, and then add 5% N235+50% sec-octanol+ 45% kerosene heteropolyacid extractant, the heteropolyacid extractant addition and the nickel solution volume ratio are 1:1, after mixing for 10min, leave to stand for layering, separate and obtain the raffinate (nickel solution) with Si and P impurity content below 1ppm solution) and the organic phase.

Embodiment approach 3

[0143] Add potassium molybdate with 1.3 times the molar content of Si and P heteroelements to the nickel solution, adjust the pH value of the nickel solution to 2.0, stir for 2 hours at room temperature, and then add 20% N235+50% n-octanol+ 30% kerosene heteropolyacid extractant, the heteropolyacid extractant addition and the nickel solution volume ratio are 1:1, after mixing for 15min, leave to stand for layering, separate and obtain the raffinate (nickel solution) with Si and P impurity content below 1ppm solution) and the organic phase.

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Abstract

The invention discloses an application of heteropolyacid as a carrier to removal of trace silicon and phosphorus impurities in a nickel solution. The multi-element is used for removing impurities in the nickel solution containing hetero-elements, and is complexed with the hetero-elements to form heteropolyacid so as to remove trace silicon and phosphorus impurities, and thus the purpose of removing impurities is achieved. The effect of removing the impurities such as Si and P from the nickel solution is remarkable.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to the application of using heteropolyacid as a carrier to remove trace silicon and phosphorus impurities in nickel solution. 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 for positive electrode materials is gradually replacing lithium cobalt oxide with an...

Claims

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Application Information

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IPC IPC(8): C22B3/22C22B3/40C22B7/00C22B23/00
CPCC22B3/22C22B7/005C22B23/00C22B3/409Y02P10/20
Inventor 吴芳龙全安罗爱平
Owner 广东芳源新材料集团股份有限公司
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