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Preparation method of battery-grade nickel sulfate solution

A nickel sulfate, battery-grade technology, applied in the field of material chemistry, can solve the problems of high process cost, long process, large acid-base consumption, etc., and achieve the effect of shortening process process, facilitating operation and reducing process cost.

Pending Publication Date: 2021-07-02
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of preparation method of battery-grade nickel sulfate solution, to solve the problems of long flow process, high process cost and large acid-base consumption in the existing preparation process of battery-grade nickel sulfate solution

Method used

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  • Preparation method of battery-grade nickel sulfate solution
  • Preparation method of battery-grade nickel sulfate solution
  • Preparation method of battery-grade nickel sulfate solution

Examples

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preparation example Construction

[0021] As described in the background art, the existing battery-grade nickel sulfate solution preparation process has the problems of long process, high process cost, and large acid-base consumption. In order to solve the above-mentioned technical problem, the application provides a kind of preparation method of battery-grade nickel sulfate solution, comprising: using the first inorganic Organic extractant carries out saponification reaction, obtains the first saponification extractant, the second saponification extractant, the 3rd saponification extractant, the 4th saponification extractant; Saponification extraction agent, the 3rd saponification extraction agent, the 4th saponification extraction agent carry out soap conversion reaction, obtain the first soap conversion extraction agent, the 2nd conversion soap extraction agent, the 3rd conversion soap extraction agent, the 4th conversion soap extraction agent; The first soap extractant and the nickel-cobalt sulfate solution...

Embodiment 1

[0042] (1) P204 extract

[0043] The P204 organic extractant that 22L concentration is 25V / V% adopts 0.5L concentration to be that the sodium hydroxide solution of 500g / L carries out saponification, and the nickel sulfate solution that uses 2.6L nickel content through saponification is that the nickel sulfate solution of 90g / L carries out soap turning ( The weight ratio of the nickel element in the nickel sulfate solution to P204 is about 1:22.8), and the high-concentration sodium sulfate solution produced by turning the soap is sent to the evaporation process of the sodium sulfate. The organic extractant after soap conversion and 10L of nickel-cobalt sulfate leaching solution (P204 extraction stock solution) with a nickel content of 90g / L are subjected to countercurrent extraction to remove impurities such as copper, manganese, calcium, zinc, iron, aluminum, etc., to achieve nickel-cobalt sulfate leaching solution. The purpose of leachate purification. The extracted P204 raf...

Embodiment 2

[0051] The difference with Example 1 is: in the P204 extraction process, the saponified extractant uses 2.3L nickel content as the P204 raffinate of 80g / L to carry out soap transfer (the nickel element in the P204 raffinate and the weight of P204 The ratio is about 1:29.0).

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Abstract

The invention provides a preparation method of a battery-grade nickel sulfate solution. The preparation method comprises the following steps: carrying out saponification reaction and soap conversion reaction on a first inorganic base and first, second, third and fourth organic extraction agents in sequence to obtain first, second, third and fourth soap conversion extraction agents; performing a first extraction process on the first soap conversion extraction agent and a nickel cobalt sulfate solution to obtain a first extraction organic phase and a first raffinate; allowing the second soap conversion extraction agent and the first raffinate to be subjected to a second extraction process to obtain a second extraction organic phase and a second raffinate; performing a third extraction process on the third soap conversion extraction agent and the second raffinate to obtain a third extraction organic phase and a third raffinate; and performing a fourth extraction process on the fourth soap conversion extraction agent and the third raffinate to obtain a fourth extraction organic phase and a battery-grade nickel sulfate solution. According to the preparation method, the process flow can be greatly shortened, the process cost can be greatly reduced, the consumption of alkali liquor and sulfuric acid can be saved, and the consumption of an organic phase can be reduced.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a method for preparing battery-grade nickel sulfate solution. Background technique [0002] Nickel sulfate is an important industrial raw material, which can be used to manufacture nickel-cadmium batteries, nickel-hydrogen batteries, catalysts for hardening oil or paint, mordants for vat dyes, metal colorants, etc., and can also be used to prepare nickel catalysts and other nickel salt etc. At present, my country has become a big country in battery production and consumption. With the extensive use of nickel-metal hydride and nickel-cadmium batteries, the amount of waste batteries and electrode waste has increased accordingly, thus providing a broad prospect for recycling nickel in waste batteries. At present, extraction and other methods are usually used to remove a large amount of metal impurities doped with nickel in waste batteries, so as to achieve the purpose of recyclin...

Claims

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Application Information

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IPC IPC(8): C01G53/10
CPCC01G53/10
Inventor 郑明臻刘诚陆业大戴江洪崔宏志张阳王恒利苏柏泉王宏岩潘苑罡
Owner CHINA ENFI ENGINEERING CORPORATION
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