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Preparation method of nickel sulfate

A technology of nickel sulfate and ferrous sulfate solution, which is applied in the preparation of nickel sulfate and nickel compounds, can solve the problems of slow dissolution rate and danger, and achieve the effects of reducing nickel content, efficient preparation, and good application prospects

Active Publication Date: 2021-12-31
江西佳纳能源科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the acid dissolution process of nickel-iron alloy, the dissolution rate is slow due to the properties of the material itself, and hydrogen gas will be generated due to the reaction between acid and nickel-iron alloy, so it is dangerous to accelerate the process by oxygen pressure leaching

Method used

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  • Preparation method of nickel sulfate

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preparation example Construction

[0019] The embodiment of the present application provides a preparation method of nickel sulfate, such as figure 1 As shown, the preparation method comprises the following steps:

[0020] S01: provide nickel-iron alloy and ferrous sulfate solution; the molar amount of nickel in the nickel-iron alloy is the same as the molar amount of iron in the ferrous sulfate solution;

[0021] S02: the ferrous sulfate solution is placed in the oxygen pressure reactor, the nickel-iron alloy is added to the oxygen pressure reactor in batches and the oxygen pressure reaction is carried out under oxygen conditions, and then solid-liquid separation is obtained to obtain the first iron slag and the first separation liquid wherein, the step of adding the nickel-iron alloy to the oxygen pressure reaction kettle in batches comprises: dividing the nickel-iron alloy into 10-60 parts, the weight difference of each part is less than or equal to 50%, and adding one part to the oxygen-pressure reaction ke...

Embodiment 1

[0044] The method for preparing nickel sulfate by nickel-iron alloy wet method, comprises the following steps:

[0045] (1) Nickel-iron alloy powder with a 200-mesh sieve mesh specification is used, wherein the nickel content is 38% and the iron content is 60%. A total of 300g of nickel-iron alloy powder is divided into 19 parts, one part is 30g, and the remaining 18 parts are 15g.

[0046] (2) will contain Fe 2+ The solution of 1L ferrous sulfate with 108g / L and pH value of 2.0 is placed in the oxygen pressure reactor equipment, heated to 100 ° C, then 30g of nickel-iron alloy powder is added to it, oxygen is introduced, and the oxygen pressure is controlled to be 0Mpa (that is, the pressure). For normal pressure), turn on stirring, then every 30min, add a portion of 15g nickel-iron alloy powder to the reaction system, after 9 hours, the nickel-iron alloy powder is added completely (a total of 300g of nickel-iron alloy powder), and it is detected that the pH value is maintai...

Embodiment 2

[0052] The method for preparing nickel sulfate by nickel-iron alloy wet method, comprises the following steps:

[0053] (1) Nickel-iron alloy powder with a 200-mesh sieve mesh specification is used, wherein the nickel content is 38% and the iron content is 60%. A total of 300g of nickel-iron alloy powder is divided into 19 parts, one part is 30g, and the remaining 18 parts are 15g.

[0054] (2) will contain Fe 2+ The solution of 1L ferrous sulfate with 108g / L and pH value of 2.0 was placed in the oxygen pressure reactor equipment, heated to 100°C, then 30g of nickel-iron alloy powder was added to it, oxygen was introduced, the oxygen pressure was controlled to be 0.3MPa, and the Stir, and then add a portion of 15g nickel-iron alloy powder to the reaction system every 15 minutes. After 4.5 hours, the nickel-iron alloy powder is completely added (a total of 300g of nickel-iron alloy powder), and the pH value of the reaction is maintained at 1.5-2.0 in the early stage and 2.0 in...

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Abstract

The invention relates to the technical field of nickel material preparation processes, in particular to a preparation method of nickel sulfate. According to the preparation method, ferro-nickel alloy is added into an oxygen pressure reaction kettle in batches to be subjected to oxygen pressure reaction with a ferrous sulfate solution under the oxygen condition, specifically, the ferro-nickel alloy is divided into 10-60 parts, the weight difference of each part is smaller than or equal to 50%, and one part is added into the oxygen pressure reaction kettle every 5-35 min. According to the method, ferrous sulfate is used as a leaching solution, and ferro-nickel alloy is added in batches, so that the amount of ferro-nickel in a reaction system can be effectively reduced, the pH value of the reaction system is effectively controlled, the purpose of reducing the content of nickel in iron slag is achieved, the nickel yield is improved, and the preparation method is safe, does not need a large number of other auxiliary materials, and is suitable for industrial production. The battery-grade nickel sulfate solution can be efficiently prepared.

Description

technical field [0001] The application belongs to the technical field of nickel material preparation technology, and in particular relates to a preparation method of nickel sulfate. Background technique [0002] With the gradual development of ternary lithium batteries to the direction of high nickel content, the production capacity of ternary lithium batteries continues to increase, and the source of nickel sulfate used to prepare ternary lithium batteries has become a thorny problem in the industry. In order to solve this problem, a large number of researchers have begun to target nickel-iron alloys that are available in large quantities and can be supplied stably. [0003] At present, nickel-iron alloys are mainly used in the smelting of stainless steel. In the process of acid dissolution of nickel-iron alloy, the dissolution rate is slow due to the properties of the material itself, and because the reaction between acid and nickel-iron alloy will generate hydrogen, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10
CPCC01G53/10C01G53/003C01P2006/80Y02E60/10
Inventor 崔俊郑江峰张颖杨诗旻任香梦
Owner 江西佳纳能源科技有限公司