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Modified eggshell membrane paper for lithium battery recovery, and preparation method and application thereof

A lithium battery and egg membrane technology, applied in the field of modified egg membrane paper and preparation, can solve the problems of unadjustable targeted screening of soluble ions, strong alkali and strong acid pollution, etc., and achieves significant market application value, easy continuous production, and improved Effect of Ion Separation Efficiency

Inactive Publication Date: 2018-04-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the defects of complex pre-treatment in the current traditional recovery and filtration process, serious pollution of strong alkali and strong acid used, and inability to adjust the targeted screening of soluble ions, the present invention proposes a modified egg membrane paper for lithium battery recovery and its preparation method and application , so that the separation is environmentally friendly and pollution-free, and the recovery process is simple, and it is easy to realize continuous production, which has important practical significance for the recovery of precious metals in lithium batteries

Method used

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  • Modified eggshell membrane paper for lithium battery recovery, and preparation method and application thereof
  • Modified eggshell membrane paper for lithium battery recovery, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] (1) According to the weight ratio of egg membrane powder to weak alkaline solution of 1:3, add egg membrane powder to ammonia solution with pH=9, stir evenly at 60rpm, modify the surface for 20 minutes, activate membrane protein Surface -OH, -COOH, -NH 2 The functional group is then used to split the disulfide bond on the surface of the egg membrane with thioglycolic acid to form a sulfhydryl group to obtain a surface-modified egg membrane powder, and the weight ratio of the thioglycolic acid to the egg membrane powder is 0.5:1;

[0037] (2) Mix 1 part of the surface-modified egg film powder obtained in step (1) with 1 part of wollastonite fiber according to mass parts, and add 0.01 parts of surfactant sodium perfluorooctanoate and 0.01 parts of GPE type according to mass parts Antifoaming agent, 0.01 part thickening agent gum arabic, stir evenly at a speed of 60 rpm to obtain egg film paper precursor;

[0038] (3) The egg film precursor of step (2) is rolled by a roller at ...

Embodiment 2

[0042] (1) According to the weight ratio of egg membrane powder to weak alkaline solution of 1:4, add egg membrane powder to the weak alkaline solution of ammonia water with pH=9.3, stir evenly at 90rpm, and modify the surface. Minutes to activate -OH, -COOH, -NH on the surface of membrane protein 2 The functional group is then used to split the disulfide bond on the surface of the egg membrane with thioglycolic acid to form a sulfhydryl group to obtain a surface-modified egg membrane powder. The weight ratio of the thioglycolic acid to the egg membrane powder is 0.8:1;

[0043] (2) Mix 1 part of the surface-modified egg film powder obtained in step (1) with 2 parts of flax fiber according to mass parts, and add 0.03 parts of surfactant sodium perfluorooctyl sulfonate, 0.04 parts by mass One part GPE type defoamer and 0.09 part thickening agent carrageenan were stirred evenly at a speed of 130 rpm to obtain egg film paper precursor;

[0044] (3) The egg film precursor of step (2) i...

Embodiment 3

[0048] (1) According to the weight ratio of egg film powder to weak alkaline solution of 1:5, add egg film powder to the weak alkaline solution of potassium hydroxide with pH=9.5, stir evenly at 180rpm to modify the surface 30 minutes, activate -OH, -COOH, -NH on the surface of membrane protein 2 The functional group is then used to split the disulfide bond on the surface of the egg membrane with thioglycolic acid to form a sulfhydryl group to obtain a surface-modified egg membrane powder, and the weight ratio of the thioglycolic acid to the egg membrane powder is 1.3:1;

[0049] (2) Mix 1 part of the surface-modified egg film powder obtained in step (1) with 2 parts of hemp fiber according to mass parts, and add 0.04 parts of surfactant sodium perfluorooctanoate and 0.08 parts of GP type defoamer according to mass parts 0.11 part of thickener pectin, stir evenly at a speed of 150rpm to obtain egg film paper precursor;

[0050] (3) The egg film precursor of step (2) is rolled by a ...

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Abstract

The invention provides a modified eggshell membrane paper for lithium battery recovery, and a preparation method and application thereof. The preparation method comprises the following steps: adding eggshell membrane powder into a weakly alkali solution for activating -OH, -COOH and -NH2 groups on the surface of membrane protein; then splitting disulfide bonds on the surface of an eggshell membrane by using mercaptoacetic acid so as to form mercapto groups; and after mixing with a fibrous material, adding a surfactant, a dispersant, an antifoaming agent and a thickening agent, and successivelycarrying out rolling, stretching and air drying so as to prepare the eggshell membrane paper with a thickness of 1 to 2 mm. The invention also discloses a method for absorbing and filtering metal ions with the modified eggshell membrane paper. Precious metal ions consisting of copper, cobalt and nickel ions and a lithium-containing filtrate are separated from a solution by controlling the pH value of the solution. The eggshell membrane paper prepared in the invention overcomes the problems that traditional filtering membranes only filter out solid precipitates and cannot screen soluble ions and that traditional process are complicated in procedure and lead to severe strong alkali and strong acid pollution; raw materials used for preparation of the eggshell membrane paper are simple and easily available; separation process is friendly to environment and free of pollution; recovery operation is simple; continuous production can be easily realized; and the eggshell membrane paper is of critical practical significance to recovery of precious metals in lithium batteries.

Description

Technical field [0001] The invention relates to the field of metal adsorbents, in particular to metal adsorption filter paper, and in particular to a modified egg film paper used for lithium battery recovery, and a preparation method and application. Background technique [0002] Lithium-ion battery is a kind of secondary battery (rechargeable battery). It generally uses lithium-containing materials with a small atomic radius as electrodes. It is mainly used for electric bicycles, electric vehicles, electric motorcycles, power tools, solar photovoltaic and wind power storage. Energy systems, smart grid energy storage systems, mobile communication base stations, electric power, chemicals, hospital backup UPS, EPS power supplies, security lighting, portable mobile power supplies, notebook computers, electric toys, mine safety equipment, digital products and other fields. Compared with nickel-cadmium and nickel-hydrogen batteries, lithium-ion batteries have many advantages such as h...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30H01M10/54
CPCB01J20/24B01J20/28033H01M10/54Y02W30/84
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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