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A method for extracting valuable metals from lithium-ion battery mixed manganese-rich waste leaching solution

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

Active Publication Date: 2020-04-07
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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  • A method for extracting valuable metals from lithium-ion battery mixed manganese-rich waste leaching solution
  • A method for extracting valuable metals from lithium-ion battery mixed manganese-rich waste leaching solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 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

[0041] 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.

[0042] 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

[0046] 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%.

[0047] 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 a lithium-ion battery mixed manganese-rich waste leaching solution. First, the precipitation method is used to selectively precipitate and separate the nickel and cobalt components from the manganese-rich solution; then, with the help of the differences in the complexation and bonding between ammonia and cobalt and nickel, and the precipitant and cobalt and nickel, the mixed solution of ammonia and ammonium salt is used to , to selectively dissolve the nickel components in the nickel-cobalt precipitation slag to achieve efficient separation of nickel and cobalt; finally, use the solvent extraction method to selectively extract the manganese components in the solution after the precipitation of nickel-cobalt to achieve high-efficiency separation of manganese and lithium separate. The process of "selective precipitation of nickel and cobalt-extraction and separation of manganese and lithium in residual liquid-selective dissolution of nickel in precipitation residue and separation of nickel and cobalt" proposed by the present invention can avoid the traditional extraction method to separate nickel and cobalt from high manganese solution. Poor disadvantages, simple operation, short process, low cost, can realize the efficient separation and recovery of valuable component elements in the manganese-rich leaching solution of waste lithium-ion batteries.

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. [0002] technical background [0003] 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 l...

Claims

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Application Information

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Patent Type & Authority Patents(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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