Method for extracting valuable metals from mixed manganese-rich waste leachate of lithium ion battery

A lithium-ion battery and valuable metal technology, applied in battery recycling, manganese sulfate, waste collector recycling, etc., can solve the problems of lithium-ion battery recycling, long separation process of nickel and cobalt, and large manganese extraction load, etc. Achieve the effect of low cost, short process and small amount of sediment

Active Publication Date: 2019-01-04
广西埃索凯循环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mixed use of power lithium-ion battery materials has brought new difficulties to the recycling of lithium-ion batteries
With the increase of manganese content in the material, when the traditional P204 extraction of manganese-P507 separation process of nickel and cobalt is used, not only the manganese extraction load is large, but also the loss of nickel and cobalt
At the same time, due to the low content of nickel and cobalt, the subsequent separation process of nickel and cobalt is long and the separation efficiency is low.

Method used

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  • Method for extracting valuable metals from mixed manganese-rich waste leachate of lithium ion battery
  • Method for extracting valuable metals from mixed manganese-rich waste leachate of lithium ion battery

Examples

Experimental program
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Embodiment 1

[0034] Take 100mlLiMn 2 o 3 with LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2The sulfuric acid leaching solution of mixed material is placed in the round bottom flask of 250ml, and the content of nickel, cobalt, manganese, lithium in the solution is as shown in table 1. Heat the round bottom flask in a water bath at 50°C, add sodium xanthate to the solution, control the molar ratio of sodium ethyl xanthate to nickel-cobalt in the solution to 2.3:1, and use a magnetic force of 150 rpm Under stirring condition, react for 2 hours. In this reaction process, the pH value is an extremely critical factor, and the relationship between the nickel-cobalt precipitation rate and the pH value is as follows: figure 1 shown. As the pH value continues to increase, the precipitation rate of nickel and cobalt continues to increase, but when the pH value exceeds 5, the loss rate of manganese in the solution becomes significantly higher. In order to effectively control the content of manganese in the precip...

Embodiment 2

[0040] The leaching solution used in this example is the same as in Example 1. The precipitant for separating nickel and cobalt is ethyl xanthic acid. The reaction steps and conditions are the same as in Example 1. The results are similar and will not be repeated. Take 10 g of the precipitate and place it in 60ml of 4mol / L ammonia water and 0.5mol / L ammonium sulfate mixed solution, under the condition of room temperature 25 ℃, react for 1 hour. The leaching rate of nickel is above 98%, while cobalt does not dissolve.

[0041] Take 20ml of sodium xanthate precipitation to remove nickel and cobalt and then filter the filtrate to place in a 150ml separating funnel. Use mono-2-ethylhexyl ethylhexylphosphate as the extractant, dissolve it in sulfonated kerosene at a volume ratio of 1:1, then measure 20ml of the dissolved extractant solution, and add it to an equal volume of filtrate. Under the condition of 25°C, shake and extract on a shaker for 10 minutes. The relationship betwe...

Embodiment 3

[0045] The leaching solution used in this example is the same as Example 1. The precipitating agent that separates nickel and cobalt is sodium formazate, and its reaction steps and reaction conditions are basically similar to embodiment 1 and 2, and difference is that the addition of precipitating agent sodium formamic and the relation of nickel-cobalt content are: the consumption of sodium formamic and nickel The molar ratio of cobalt is 3.5:1. The pH value is controlled at 5.0, and the results show that the precipitation rate of nickel and cobalt can reach more than 99%.

[0046] The process of the separation of manganese and lithium and the separation of nickel and cobalt in this embodiment are the same as the steps and conditions of embodiment 1. The effects of separation of nickel and cobalt and separation of manganese and lithium are also basically the same as in embodiment 1.

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Abstract

The invention discloses a method for efficiently separating valuable metals from mixed manganese-rich waste leachate of a lithium ion battery. The method comprises the following steps: firstly, nickel-cobalt components are selectively precipitated and separated from a manganese-rich solution with a precipitation method; then, by aid of difference of complexing bonding of ammonia with cobalt and nickel and of a precipitant with cobalt and nickel, an ammonia and ammonium salt mixed solution is adopted for selectively dissolving nickel component in nickel-cobalt precipitated sludge, and efficientseparation of nickel and cobalt is realized; finally, manganese component in the solution with nickel and cobalt precipitated is extracted selectively with a solvent extraction method, and efficientseparation of manganese and lithium is realized. According to the provided process of selective nickel-cobalt precipitation-raffinate manganese and lithium extraction and separation-precipitated sludge selective nickel dissolution and nickel-cobalt separation, operation is simple, flow is short, cost is low, and efficient separation and recovery of valuable component elements in the manganese-richleachate of the waste lithium ion battery can be realized.

Description

technical field [0001] The invention relates to the field of recycling waste batteries, in particular to a method for extracting valuable metals from the leaching solution of mixed manganese-rich waste materials of lithium-ion batteries. technical background [0002] With the development and progress of human society, more and more energy is consumed. However, the continuous consumption of fossil energy has not only caused the depletion of resources, but also brought serious environmental problems. In order to alleviate the dependence on fossil energy and protect the environment, countries are vigorously promoting the development of the new energy automobile industry. As one of the important power sources of new energy vehicles, lithium-ion batteries are constantly expanding their production scale. However, the life of a power lithium-ion battery is generally 3 to 5 years, and a large number of lithium-ion batteries will inevitably produce a large number of waste lithium-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B3/38C22B26/12C22B47/00H01M10/54C01G45/10
CPCC01G45/10C22B7/006C22B7/008C22B23/0446C22B23/0461C22B23/0492C22B26/12C22B47/00C22B3/3844C22B3/3846H01M10/54Y02W30/84Y02P10/20
Inventor 杨越孙伟宋绍乐胡岳华
Owner 广西埃索凯循环科技有限公司
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