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Method for preparing refined nickel salt from reduced nickel powder as raw material and nickel salt prepared with method

A technology for reducing nickel powder and nickel salt, which is applied in nickel halide, nickel sulfate, etc., can solve the problems that it cannot be used as the raw material of lithium-ion battery material precursor, the process is complicated, and the product does not meet the standard of refined nickel sulfate, so as to achieve high purity , The effect of simple process steps and easy production process

Inactive Publication Date: 2018-08-21
HUNAN BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complex in process, and the resulting product does not reach the standard (5ppm) of refined nickel sulfate, and cannot be used as a raw material for lithium-ion battery material precursors

Method used

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  • Method for preparing refined nickel salt from reduced nickel powder as raw material and nickel salt prepared with method
  • Method for preparing refined nickel salt from reduced nickel powder as raw material and nickel salt prepared with method
  • Method for preparing refined nickel salt from reduced nickel powder as raw material and nickel salt prepared with method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Process flow chart see figure 1 .

[0033] (1) Add 120 grams of reduced nickel powder into a container with 1 L of deionized water, add 200 g of 98% concentrated sulfuric acid and stir for 10 hours, blow air into the leaching container to make the hydrogen volume concentration in the container less than 4.1%;

[0034] (2) Add 30% hydrogen peroxide in the container, when the pH value of the solution rises to about 4.5, stop adding hydrogen peroxide;

[0035] (3) solid-liquid separation gets the nickel sulfate solution of 112g / L;

[0036] (4) Nickel sulfate solution evaporative crystallization obtains refined nickel sulfate product, and the elemental content of product is as table 3.

Embodiment 2

[0038] Process flow chart see figure 1 .

[0039] (1) Add 120 grams of reduced nickel powder into a container with 1 L of deionized water, add 495 g of 30% hydrochloric acid and stir for 12 hours, blow nitrogen into the leaching container to make the hydrogen volume concentration in the container less than 4.1%;

[0040] (2) Add 30% hydrogen peroxide in the container, when the pH value of the solution rises to about, stop adding hydrogen peroxide;

[0041] (3) solid-liquid separation gets the nickel chloride solution of 114g / L;

[0042] (4) Nickel chloride solution evaporative crystallization obtains refined nickel chloride product, and the elemental content of product is as table 3.

Embodiment 3

[0044] Process flow chart see figure 2 .

[0045] (1) There are 5 containers with an effective volume of 1.0L, and the upper part of the container is connected with a pipeline, and 420g, 105g, 54g, 39g and 15g of nickel powder are added to the five containers respectively,

[0046] (2) Add 1.59mol / L sulfuric acid to the first container, the flow rate is 0.3L / h, the solution flows from the first container to the second container through the overflow port, until the fifth container, close the container to Only one gas outlet is reserved for each container, and the hydrogen volume concentration in the holder is greater than 74.2%;

[0047] (3) After the solution is filled, detect that the nickel content in the five containers is 71.5g / L, 88.6g / L, 97.4g / L, 103.7g / L and 106.5g / L respectively, and put them into the five containers respectively after the detection Add 71.5g, 17.1g, 8.8g, 6.3g and 2.8g of nickel powder;

[0048] (4) Continue to add hydrogen peroxide at a speed of ...

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Abstract

The invention belongs to the technical field of inorganic fine chemical products and discloses a method for preparing refined nickel salt from reduced nickel powder as a raw material and the nickel salt prepared with the method. The method comprises following steps: (1), the reduced nickel powder is leached by acid liquor, and a nickel salt solution is obtained; (2), hydrogen peroxide is added tothe nickel salt solution, and pH is regulated to 4.0-5.5; (3), solid-liquid separation is performed, a liquid is subjected to evaporative crystallization, and the refined nickel salt is obtained. Theinvention further provides the refined nickel salt prepared with the method. The preparation method adopts simple technological steps, the production process is easy to control, an obtained product ishigh in purity, impurities such as calcium, magnesium, iron, copper, zinc and cadmium in the nickel salt product are smaller than 10 ppm, and the product can be used for preparing binary precursors (nickel-cobalt hydroxide and nickel-manganese hydroxide) and a ternary precursor (nickel-cobalt-manganese hydroxide) of a lithium ion battery. According to the method for preparing the refined nickel salt from the reduced nickel powder as the raw material, a new way is provided for preparation of the refined nickel salt.

Description

technical field [0001] The invention belongs to the technical field of inorganic fine chemical products, and in particular relates to a method for preparing refined nickel salt by using reduced nickel powder as a raw material and the nickel salt. Background technique [0002] Refined nickel salts can be used to prepare nickel-containing lithium-ion battery material precursors. Wang Hong of Northeastern University and others have studied a method for preparing nickel sulfate crystals by treating nickel-containing spent catalysts by an all-wet method. Adopting the technological process of raw material dissolution-extraction and recovery of copper-chemical purification-deep purification-extraction and back-extraction of nickel-concentration and crystallization, the obtained nickel sulfate crystals have relatively high impurities such as Fe, Co, Zn, Cu, Pb, etc., which do not reach the level of refined nickel sulfate standard, and the process is complex. Jiang Jing studied the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10C01G53/09
CPCC01G53/09C01G53/10C01P2006/80
Inventor 谭群英唐红辉王杜韦立剑
Owner HUNAN BRUNP RECYCLING TECH
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