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Method for removing impurities from nickle solutions by using reusable multi-metal salt as complexing agent

A polymetallic salt, nickel solution technology, applied in the direction of improving process efficiency, can solve the problems of increasing the burden of impurity removal in the subsequent process and failing to achieve deep desilication

Active Publication Date: 2021-01-15
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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  • Method for removing impurities from nickle solutions by using reusable multi-metal salt as complexing agent
  • Method for removing impurities from nickle solutions by using reusable multi-metal salt as complexing agent
  • Method for removing impurities from nickle solutions by using reusable multi-metal salt as complexing agent

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Effect test

Embodiment approach 1

[0138] 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

[0140] 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

[0142] 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 a method for removing impurities from nickle solutions by using reusable multi-metal salt as a complexing agent. Heteropoly acid is formed by utilizing multi-elements and heter-elements, so that the heter-elements in the nickle solutions are compounded in a form of the heteropoly acid, and the impurities including Si and P are removed from the nickle solutions, so that an obvious effect is achieved. Meanwhile, loaded organic matters in a heteropoly acid extracting agent are subjected to reverse extraction and are then recycled, the multi-element components are precipitated and recycled, and first acidified acidic medium solutions are recycled after acid is proportioned into the first acidic medium solutions again and then concentration is regulated, and a majority of materials participating in reaction procedures are recycled and then perform the next batch of reaction again, and therefore, significance on battery-level nickel solutions can be achieved in a lowcost mode, and the method is advantaged in high efficiency, high yield and low cost.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgical production, in particular to a method for removing impurities from a nickel solution using a reusable polymetallic salt as a complexing agent. 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 wi...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/44C22B3/22C22B3/40
CPCC22B23/0461C22B3/44C22B3/22C22B3/402Y02P10/20
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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