A method for purifying lithium element from battery powder

A battery and element technology, applied in the field of waste battery recycling and treatment, can solve the problem of metal element loss and achieve strong anti-interference effect

Active Publication Date: 2020-09-01
上饶市环锂循环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for purifying lithium from battery powder in order to overcome the severe co-extraction effect of the existing coal-dissolving extraction method in the treatment of battery powder and cause a large amount of metal element loss. Extract and its preparation method

Method used

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  • A method for purifying lithium element from battery powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of extract

[0023] The extracting liquid is formed by mixing saponified extractant and saponified kerosene, and the volume ratio of saponified extractant and saponified kerosene is 43:57.

[0024] The saponified extractant is prepared by the following method: add 2 g of sodium hydroxide to 40 ml of the extractant, add absolute ethanol after stirring, heat at 50° C. for 1.5 h, evaporate the ethanol to obtain the saponified extractant.

[0025] Saponified kerosene is prepared by the following method: add 4 g of sodium hydroxide to 50 ml of kerosene, add absolute ethanol after stirring, heat at 50° C. for 2 hours, and evaporate the ethanol to obtain saponified kerosene.

[0026] (2) Purification method:

[0027] S1. The battery powder and 0.7M sulfuric acid are mixed with a liquid-solid ratio of 50ml:10g and filtered; the battery powder infusion solution is obtained;

[0028] S2. After mixing and shaking 4ml of the battery powder infusion solution and 30...

Embodiment 2

[0031] (1) Preparation of extract

[0032] The extracting liquid is prepared by mixing saponified extractant and saponified kerosene, and the volume ratio of saponified extractant and saponified kerosene is 30:70.

[0033] The saponified extractant is prepared by the following method: add 1 g of sodium hydroxide to 40 ml of the extractant, add absolute ethanol after stirring, heat at 60° C. for 1 h, evaporate the ethanol to obtain the saponified extractant.

[0034] Saponified kerosene is prepared by the following method: add 3 g of sodium hydroxide to 30 ml of kerosene, add absolute ethanol after stirring, heat at 40° C. for 2 hours, and evaporate the ethanol to obtain saponified kerosene.

[0035] (2) Purification method:

[0036] S1. The battery powder and 0.6 M sulfuric acid are mixed with a liquid-solid ratio of 50ml: 5g and filtered; the battery powder infusion solution is obtained;

[0037] S2. After mixing and shaking 4ml of the battery powder infusion solution and 2...

Embodiment 3

[0040] (1) Preparation of extract

[0041] The extracting solution is formed by mixing saponified extractant and saponified kerosene, and the volume ratio of the saponified extractant and saponified kerosene is 50:50.

[0042] The saponified extractant is prepared by the following method: add 2 g of sodium hydroxide to 50 ml of the extractant, add absolute ethanol after stirring, heat at 70° C. for 2 h, evaporate the ethanol to obtain the saponified extractant.

[0043] Saponified kerosene is prepared by the following method: add 7 g of sodium hydroxide to 55 ml of kerosene, add absolute ethanol after stirring, heat at 70° C. for 3 hours, and evaporate the ethanol to obtain saponified kerosene.

[0044] (2) Purification method:

[0045] S1. The battery powder and 0.8 M sulfuric acid are mixed with a liquid-solid ratio of 50ml:10g and filtered; the battery powder infusion solution is obtained;

[0046] S2. After mixing and shaking 4ml of the battery powder infusion solution a...

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Abstract

The invention relates to the technical field of waste battery recycling and treatment, in particular to an extract solution for purifying lithium elements from battery powder and a preparation method thereof. The extract contains saponified extractant and saponified kerosene; the volume ratio of the saponified extractant and saponified kerosene is: 30~50:50~70. After the extraction solution of the present invention is fully mixed with the battery powder immersion solution, the purity that can be achieved by purification is very high, and the lithium element can be simply extracted in a solution system containing more complex elements without being interfered by other metal elements; in addition, for The purification and recovery of lithium element has a considerable purification rate, which can fully recycle and utilize lithium element, and has the characteristics of simplicity and high efficiency.

Description

technical field [0001] The invention relates to the technical field of waste battery recycling and treatment, in particular to a method for purifying lithium elements from battery powder. Background technique [0002] The existing coal-dissolved extraction and purification of elements starts with a low pH, and after slowly adjusting the pH, different extraction agents are used to purify the elements. In the process of adjusting the pH value, a large amount of alkaline substances such as sodium hydroxide solid or solution are often added, resulting in a state where the volume of the solution is enlarged and a large amount of precipitates are produced. In the prior art, the treatment of waste battery powder or the treatment of waste raw materials containing multiple element components will cause serious co-extraction effects, resulting in a decrease in the extraction rate of elements. Contents of the invention [0003] The technical problem to be solved by the present inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B3/38C22B26/12
CPCC22B7/006C22B26/12C22B3/3846Y02P10/20
Inventor 朱叶周刘泽坚刘泽文梁阮强
Owner 上饶市环锂循环科技有限公司
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