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Method for detecting nickel, cobalt and manganese in waste lithium battery

A technology of waste lithium battery and detection method, which is applied in chemical analysis by titration, chemical analysis by precipitation, etc., can solve the problems of distorted detection results, small precipitation molecules, easy to produce human errors, etc., and achieves simple detection method. , The test results are stable and the effect of reducing interference

Inactive Publication Date: 2019-11-19
四川长虹格润环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The potentiometric titration method is cumbersome to operate and prone to human error; the 1-nitroso-2-naphthol precipitation method is used to determine cobalt, and the precipitate molecules are small and easy to filter through, resulting in inaccurate test results, and the glassware is not easy to clean after precipitation and drying; ICP The direct determination method is suitable for the measurement range of nickel, cobalt and manganese content: ≤5%. Since the three elements of nickel, cobalt and manganese belong to transition metals and have similar properties, they are easy to interfere with each other. If the content of nickel, cobalt and manganese in the sample is too high, the test results will be distorted

Method used

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  • Method for detecting nickel, cobalt and manganese in waste lithium battery
  • Method for detecting nickel, cobalt and manganese in waste lithium battery
  • Method for detecting nickel, cobalt and manganese in waste lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0070] Weigh 3.0000 grams of sample 1, place it in a 500ml beaker, moisten it with a small amount of water, add 30ml of hydrochloric acid to dissolve it initially, then add 10ml of nitric acid to continue dissolving, after the test solution is boiled to a small volume, add about 50ml of water to boil to dissolve the salts, Remove and cool and then filter with a suction filter, wash the precipitate with pure water for 5-6 times, transfer the obtained filtrate and lotion into a 500ml volumetric flask and shake it up for later use;

[0071] Take 25ml of the test solution from the above-mentioned volumetric flask, add dropwise (40%) potassium hydroxide solution until precipitation occurs, then add dropwise (1+3) hydrochloric acid until the precipitation just dissolves, add 10ml of glacial acetic acid and shake well, then add 50% 40ml of potassium nitrite solution was stirred evenly, placed in a 70°C water bath for 3 hours, taken out and cooled, filtered and washed with 5% potassium...

Embodiment 2

[0079] Weigh 3.0000 grams of sample 2, place it in a 500ml beaker, moisten it with a small amount of water, add 30ml of hydrochloric acid to dissolve initially, then add 10ml of nitric acid to continue dissolving, wait for the test solution to boil to a small volume, add about 50ml of water to boil to dissolve the salts, Remove and cool and then filter with a suction filter, wash the precipitate with pure water for 5-6 times, transfer the solution to a 500ml volumetric flask and shake it well for later use;

[0080] Take 25ml of test solution from the volumetric flask, add (40%) potassium hydroxide solution dropwise until precipitation occurs, then add (1+3) hydrochloric acid dropwise until the precipitate just dissolves, add 10ml of glacial acetic acid and shake well, then add 50% Stir 45ml of potassium nitrite solution evenly, place it in a water bath at 70°C for 3 hours, take it out and cool it, filter and wash the precipitate with 5% potassium nitrite until the filtrate is ...

Embodiment 3

[0088] Weigh 3.0000 grams of sample 3, put it in a 500ml beaker, moisten it with a small amount of water, add 30ml of hydrochloric acid to dissolve it initially, then add 10ml of nitric acid to continue dissolving, after the test solution is boiled to a small volume, add about 50ml of water to boil to dissolve the salts, Remove and cool and then filter with a suction filter, wash the precipitate with pure water 5-6 times, transfer the solution to a 500ml volumetric flask and shake it up for later use.

[0089] Take 25ml of test solution from the volumetric flask, add (40%) potassium hydroxide solution dropwise until precipitation occurs, then add (1+3) hydrochloric acid dropwise until the precipitate just dissolves, add 10ml of glacial acetic acid and shake well, then add 50% Stir 40ml of potassium nitrite solution evenly, place it in a water bath at 70°C for 3 hours, take it out and cool it, filter and wash the precipitate with 5% potassium nitrite until the filtrate is colorl...

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Abstract

The invention relates to a method for detecting nickel, cobalt and manganese in a waste lithium battery, and belongs to the technical field of multi-element content determination. A sample is preparedinto a solution; cobalt reacts with nitrite in an acetic acid medium to precipitate so as to be separated from nickel and manganese, cobalt reacts with excessive EDTA, and copper sulfate is used to titrate residual EDTA to measure the content of cobalt; and ammonia water and hydrogen peroxide are added into a nickel and manganese solution obtained through separation to precipitate manganese so asto separate nickel from manganese, and the content of nickel and the content of manganese are measured respectively. The interference of elements such as nickel and manganese on cobalt determinationcan be reduced. The detection method is simple, the detection result is stable and accurate, and the standard addition recovery rate can reach 99% or above.

Description

technical field [0001] The invention belongs to the technical field of multi-element content determination, and in particular relates to a detection method for nickel, cobalt and manganese in waste lithium batteries. Background technique [0002] In recent years, as the country continues to promote environmental protection awareness and advocate green energy, green and environmentally friendly lithium-ion batteries have been gradually developed and widely used. Lithium-ion batteries have the advantages of high working voltage, small size, light weight, high energy, low pollution, and long cycle life, and have become the absolute main products in the target market of new energy vehicles and battery vehicles. [0003] However, the huge battery production and consumption has brought a surprising number of waste batteries. Although compared with primary batteries, lithium-ion batteries have relatively little impact on the environment, but the positive and negative electrode mat...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N31/02
CPCG01N31/02G01N31/16
Inventor 宋传军叶汉伟李霞洪辉罗宏基
Owner 四川长虹格润环保科技股份有限公司
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