Unlock instant, AI-driven research and patent intelligence for your innovation.

Composite membrane for separating lithium ions and cobalt ions and preparation method thereof

A technology of cobalt ions and lithium ions, which is applied in the field of membrane separation, can solve problems such as the separation of lithium ions and cobalt ions, and achieve the effects of good interception effect, good acid resistance and corrosion resistance, and good corrosion resistance

Inactive Publication Date: 2017-12-12
CHANGAN UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a composite membrane for separating lithium ions and cobalt ions and a preparation method thereof, so as to solve the separation problem of lithium ions and cobalt ions in lithium cobaltate leaching solutions in lithium batteries

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] The present embodiment provides a composite membrane for separating lithium ions and cobalt ions, including a non-woven fabric layer, a film layer is arranged on the non-woven fabric, and a layer of sulfuric acid titanium oxide layer is arranged on the surface of the film layer;

[0030] The film layer is formed by mixing peptidoglycan, graphite fiber, porogen and solvent, drying and fixing the volatile solvent. The raw materials of the film layer are composed of the following raw materials in parts by weight: 22% of peptidoglycan, 13% of graphite fiber, 8% of porogen, and 57% of solvent.

[0031] The hydroxyl content of peptidoglycan is 11%-32%, and the preferred hydroxyl content in this embodiment is 20%.

[0032] The porogen is a mixture of one or more of ethylene glycol, formate, nitrobenzene, ethylene oxide, polyvinylbenzene, and pyridine. In this embodiment, pyridine is preferred, and pyridine is used as a representative.

[0033] The solvent is prepared from tet...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a composite membrane with a function of separating lithium ions and cobalt ions and a preparation method thereof. The composite membrane comprises a non-woven fabric layer, wherein a membrane layer is arranged on the non-woven fabric layer, and a sulfuric acid titanium oxide layer is arranged on the surface of the membrane layer; the membrane layer is formed by mixing peptidoglycan, graphite fibers, a pore foaming agent and a solvent and drying and volatilizing the solvent. The composite membrane is prepared by preparation of a membrane liquid, preparation of the membrane layer, preparation of the sulfuric acid titanium oxide layer and formation of products. The composite membrane has high water flux and high ion rejection rate to a lithium cobalt oxide infusion solution, and also has great acid resistance and corrosion resistance. The composite membrane mainly utilizes the aperture size to separate metal cobalt and lithium ions of the lithium cobalt oxide infusion solution, resulting in better rejection effect to the cobalt and lithium metal ions. Furthermore, the membrane layer of the composite membrane utilizes peptidoglycan as the raw material, so that the prepared composite membrane has better corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of membrane separation and relates to lithium ions and cobalt ions, in particular to a composite membrane for separating lithium ions and cobalt ions and a preparation method thereof. Background technique [0002] At present, in lithium batteries, the share of lithium cobalt oxide batteries accounts for about 60%. However, lithium cobalt oxide batteries contain a large amount of metal lithium and cobalt. However, the vast majority of metal cobalt and lithium are extremely important metal resources. At the same time, metal lithium and cobalt plasma enter water and soil, which is extremely harmful to human health. In the general wet recovery of lithium metal and cobalt, the metal lithium and cobalt will be separated in the solution by different methods at the end. In order to more efficiently and economically separate lithium metal and cobalt ions in the solution, it is particularly urgent to develop an adva...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/08B01D69/02B01D69/12B01D67/00
CPCB01D67/0013B01D69/02B01D69/12B01D71/08B01D2325/30
Inventor 戴书琪姬国斌林晨昊柴智翟璐
Owner CHANGAN UNIV