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Method for extracting and impurity removing of low-sodium high-impurity nickel sulfate solution

A nickel sulfate and impurity technology, which is applied in the field of extraction and removal of impurities from low-sodium and high-impurity nickel sulfate solutions, can solve the problems of high cost, inability to handle, and corrosion of calcium and magnesium slag in equipment and facilities, and achieve low cost, less total amount, and reduced The effect of emissions

Pending Publication Date: 2021-03-05
金川集团镍盐有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional methods of removing impurities from nickel sulfate solution are sodium fluoride to remove calcium and magnesium, P507 to remove impurities, and P204 to remove sodium by full extraction. Due to the use of sodium fluoride to remove calcium and magnesium, the sodium content in nickel sulfate solution is relatively high, even if other impurities in the solution are qualified , the sodium-containing nickel sulfate solution must be fully extracted with P204 to remove sodium before it can be evaporated and crystallized to produce nickel sulfate products. The cost is relatively high, and the removal of calcium and magnesium by sodium fluoride not only corrodes equipment and facilities, but also produces calcium and magnesium slag that cannot be processed.

Method used

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  • Method for extracting and impurity removing of low-sodium high-impurity nickel sulfate solution
  • Method for extracting and impurity removing of low-sodium high-impurity nickel sulfate solution
  • Method for extracting and impurity removing of low-sodium high-impurity nickel sulfate solution

Examples

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Effect test

Embodiment 1

[0044] Preparation of P204 nickel soap organic phase: mix P204 extractant (1000mL) and sulfonated kerosene (4000mL) evenly, add liquid alkali solution (200mL) with a concentration of 30% by mass to saponify, obtain P204 soap and then organic; The post-organic adopts nickel soap pre-liquid to convert sodium soap to nickel soap, nickel-soap pre-liquid adopts nickel sulfate solution with a nickel ion content of 55g / L, and the ratio of P204 soap post-organic to nickel soap pre-liquid is 3:1, and the phase separation is obtained. P204 nickel soap organic phase and first nickel soap residual liquid.

[0045] Sodium washing: use dilute sulfuric acid with a hydrogen ion concentration of 1.95 mol / L and P204 nickel soap organic phase two-stage cross-flow extraction, separate phases to obtain P204 nickel-loaded organic phase and the first sodium washing solution, P204 nickel soap organic phase and The ratio of dilute sulfuric acid was 30:1.

[0046] P204 extraction: add low sodium and h...

Embodiment 2

[0055] Preparation of P204 nickel soap organic phase: P204 extractant (830mL) and sulfonated kerosene (4170mL) were mixed uniformly, and then liquid alkali solution (130mL) with a mass percentage concentration of 40% was added to saponify to obtain P204 soap and organic; The post-organic adopts nickel soap pre-liquid to convert sodium soap to nickel soap, and the nickel-soap pre-liquid adopts nickel sulfate solution with a nickel ion content of 50g / L, and the ratio of P204 soap post-organic and nickel soap pre-liquid is 2:1, and the phase separation is obtained. P204 nickel soap organic phase and first nickel soap residual liquid.

[0056] Washing sodium: using dilute sulfuric acid with a hydrogen ion concentration of 1.45mol / L and P204 nickel soap organic phase two-stage cross-flow extraction, phase separation, to obtain P204 nickel-loaded organic phase and the first sodium washing solution. The ratio of organic phase of P204 nickel soap to dilute sulfuric acid is 25:1.

[0...

Embodiment 3

[0066] Preparation of P204 nickel soap organic phase: mix P204 extractant (1250mL) and sulfonated kerosene (3750mL) evenly, add liquid alkali solution (150mL) with a concentration of 40% by mass to saponify, obtain P204 soap and then organic; The post-organic uses nickel soap pre-liquid to convert sodium soap to nickel soap, nickel-soap pre-liquid uses nickel sulfate solution with a nickel ion content of 40g / L, and the ratio of P204 soap post-organic to nickel soap pre-liquid is 1:1, and the phase separation is obtained. P204 nickel soap organic phase and first nickel soap residual liquid.

[0067] Washing sodium: using dilute sulfuric acid with a hydrogen ion concentration of 1.05mol / L and P204 nickel soap organic phase two-stage cross-flow extraction, phase separation, to obtain P204 nickel-loaded organic phase and the first sodium washing solution. The ratio of P204 nickel soap organic phase to dilute sulfuric acid is 20:1.

[0068] P204 extraction: add low sodium and high...

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Abstract

The invention discloses a method for extracting and impurity removing of a low-sodium high-impurity nickel sulfate solution, which comprises the following steps: mixing a P204 extractant with sulfonated kerosene, sequentially adding a liquid caustic soda solution and a nickel soap precursor solution, and carrying out phase splitting to obtain a P204 nickel soap organic phase; washing the P204 nickel soap organic phase with dilute sulfuric acid, and performing phase splitting to obtain a P204 nickel-containing loaded organic phase; adding the low-sodium high-impurity nickel sulfate solution into the P204 nickel-containing loaded organic phase, carrying out countercurrent extraction, and carrying out phase splitting to obtain P204 raffinate; preparing a C272 nickel soap organic phase; washing the C272 nickel soap organic phase with dilute sulfuric acid, and performing phase splitting to obtain a C272 nickel-containing loaded organic phase; and adding the P204 raffinate into the C272 nickel-containing loaded organic phase, carrying out countercurrent extraction at the temperature of 40 DEG C to 60 DEG C, and carrying out phase splitting to obtain a nickel sulfate solution with qualified impurity content. The process is optimized and upgraded, the process flow is shortened, and the overall production cost of the nickel sulfate product is reduced.

Description

technical field [0001] The invention belongs to the technical field of nickel hydrometallurgy, and in particular relates to a method for extracting and removing impurities from a nickel sulfate solution with low sodium and high impurities. Background technique [0002] In recent years, with the development of new energy vehicles, new energy battery technology is also constantly innovating, and many investors have focused on the materials of new energy batteries, aiming to seek new breakthroughs. As the main raw material in the battery field, nickel sulfate, a new demand growth point has emerged, which has caused earth-shaking changes in the entire industry chain. The demand for basic raw material battery-grade nickel sulfate is increasing, and domestic production of nickel salt products There are more and more enterprises, and the domestic nickel salt product market as a whole is facing a market situation with intensified competition. [0003] The traditional methods of rem...

Claims

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Application Information

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IPC IPC(8): C01G53/10
CPCC01G53/10C01G53/003
Inventor 孟茂勇龚继宝麻在生王强任伟沈艳玲秦雪萍
Owner 金川集团镍盐有限公司