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Method for preparing strong acid salt containing nickel-cobalt-zinc ions

A zinc ion and strong acid salt technology, which is applied in the field of preparing strong salt containing nickel, cobalt and zinc ions, can solve the problems of low efficiency, high cost, and complicated operation, and achieve the effects of high efficiency, reduced recovery cost, and simple operation

Active Publication Date: 2014-10-01
先进储能材料国家工程研究中心有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of complex operation, low efficiency and high cost due to the large difference in the removal methods of different metal impurities with different concentrations.
At the same time, the recovered products are mainly industrial-grade nickel salts, cobalt salts, etc., most of which have only been recycled and reused, but have not been returned to battery manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of method for preparing the vitriol containing nickel-cobalt-zinc ion, carries out according to the following steps:

[0018] (1) Breaking the battery cell obtained after the used nickel-hydrogen battery is broken into powder;

[0019] (2) Take 1kg of battery powder and add it to 30L of a mixed solution composed of sulfuric acid and oxidant hydrogen peroxide (wherein the concentration of sulfuric acid is 0.5mol / L, and the concentration of hydrogen peroxide is 0.8ml / g), and heated to 60-65°C , and continued to stir for 4h to obtain leachate. The concentration of the leach solution is: Ni12-17g / L, Co0.5-1.5g / L, Re3-6g / L, Fe0.05-0.3g / L, Zn0.1-0.5g / L, Mn0.1-0.5g / L L. The pH value is about 0.8-1.0.

[0020] (3) Use 4mol / L NaOH to adjust the pH value to 1.5, keep the constant temperature at 60°C, and add excess anhydrous sodium sulfate while stirring, and the rare earth elements can be precipitated in the form of rare earth sulfate. Stand still and separate the sol...

Embodiment 2

[0025] A kind of method for preparing the vitriol containing nickel-cobalt-zinc ion, its operation step is similar with embodiment, and difference is:

[0026] 1, in the step (4), be 5:1 to add wherein the extractant organic solution that pH value is 2.8 by the volume ratio of organic phase and aqueous phase solution, wherein extractant is by naphthalenesulfonic acid and pyridine carboxylate molar Ratio is 1:5 to mix compound, the organic solvent that extractant organic solution adopts is No. 260 mineral spirits;

[0027] 2. In step (5), the volume ratio of the organic phase to the aqueous phase is 3:1.

Embodiment 3

[0029] A kind of method for preparing the vitriol containing nickel-cobalt-zinc ion, carries out according to the following steps:

[0030] (1) Breaking the battery cell obtained after the used nickel-hydrogen battery is broken into powder;

[0031] (2) Take 1kg of battery powder and add it to 30L of a mixed solution composed of sulfuric acid and oxidant hydrogen peroxide (wherein the concentration of sulfuric acid is 0.5mol / L, and the concentration of hydrogen peroxide is 0.8ml / g), and heated to 60-65°C , and continued to stir for 4h to obtain leachate. The concentration of the leach solution is: Ni12-17g / L, Co0.5-1.5g / L, Re3-6g / L, Fe0.05-0.3g / L, Zn0.1-0.5g / L, Mn0.1-0.5g / L L. The pH value is about 0.8-1.0.

[0032] (3) Use 4mol / L NaOH to adjust the pH value to 1.5, keep a constant temperature of 50°C, add excess anhydrous sodium sulfate while stirring, and the rare earth elements can be precipitated in the form of rare earth sulfate. Stand still and separate the solid and...

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Abstract

The invention provides a method for preparing strong acid salt containing nickel-cobalt-zinc ions. The method comprises the following steps: by adopting a used nickel-metal hydride battery as a raw material, disintegrating the raw material battery, crushing a cell, dissolving the cell, settling the rare earth to obtain to obtain aqueous solution with the rare earth being removed, extracting, and reverse extracting. The method is simple in process, the recovery rate of the nickel cobalt and zinc can reach more than 99 percent, the strong acid salt containing the nickel-cobalt-zinc ions can be directly used for preparing spherical nickel hydroxide, the separation refining crystallizing step is omitted, the efficiency is high, and the cost can be reduced.

Description

technical field [0001] The invention relates to a method for preparing a strong acid salt, in particular to a method for preparing a strong acid salt containing nickel, cobalt and zinc ions. Background technique [0002] Ni-MH batteries are one of the most mature new energy batteries that have been commercialized in the market, and are widely used in people's daily life. With the gradual depletion of mineral resources such as nickel sulfide, the improvement of environmental protection requirements and the need for resource recycling, the recycling of waste batteries has emerged as a major issue in front of people. However, the recycling of used batteries in China has not been greatly developed due to reasons such as complex process, low efficiency, and high cost. [0003] The traditional battery recycling method is to disassemble and pulverize the battery, leaching with sulfuric acid, and remove the low-priced metals in the leaching solution as impurities by precipitation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B19/30H01M10/54
CPCY02P10/20Y02W30/84
Inventor 王一乔蒋庆来杨先锋齐士博葛良知石建珍张洪涛欧腾蛟肖连生
Owner 先进储能材料国家工程研究中心有限责任公司
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