Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for extracting lithium from lithium-containing liquid waste generated in waste lithium-ion battery recycling process

A lithium-ion battery and waste liquid technology, applied in the field of lithium recovery, can solve the problems of single product purity, insufficient economic and environmental protection, loss of lithium resources, etc., to achieve maximum recycling, simplify subsequent processing procedures, and improve utilization.

Active Publication Date: 2016-07-06
CENT SOUTH UNIV
View PDF5 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-containing waste liquid is obtained after cobalt and nickel are extracted from the positive electrode materials of waste lithium-ion batteries by leaching, precipitation, extraction and other methods. At present, most enterprises do not recycle lithium-containing waste liquid and treat it as waste liquid, resulting in a large amount of lithium resources. drain
Due to the low concentration of lithium ions in the lithium-containing waste liquid, if the traditional carbonate precipitation method is used for recovery, there are the following problems: (1) the recovery rate is low, the residual lithium in the solution is high, and the obtained product is single and low in purity (2) Lithium carbonate precipitate will cause product loss on the one hand in the washing and purification process because it is slightly soluble in water, and on the other hand will cause a large amount of waste water to be generated, which is not economical and environmentally friendly

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for extracting lithium from lithium-containing liquid waste generated in waste lithium-ion battery recycling process
  • Method for extracting lithium from lithium-containing liquid waste generated in waste lithium-ion battery recycling process
  • Method for extracting lithium from lithium-containing liquid waste generated in waste lithium-ion battery recycling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Lithium-containing waste liquid produced during the recycling of waste lithium-ion battery cathode materials is mainly Li-containing waste liquid. + 、Na + 、H + and SO 4 2- aqueous solution, the pH of the solution is 4-5, and the lithium ion concentration is 7g / L.

[0032] Such as figure 1 Shown, a kind of method of the present invention extracts lithium from the lithium-containing waste liquid that waste lithium ion battery recovery process produces, comprises the following steps:

[0033] (1) Sodium carbonate solid with theoretical solubility (maximum solubility in 100g of water at a certain temperature) is added to 200mL, 60°C lithium-containing waste liquid to carry out sodium carbonate lithium precipitation reaction, stirred for 1 hour, and then filtered and separated to obtain Liquid (filtrate) and crude lithium carbonate after sinking lithium;

[0034] (2) Cool and crystallize the lithium-precipitated liquid (filtrate) obtained in step (1) at 5° C., filter a...

Embodiment 2

[0039] Lithium-containing waste liquid produced during the recycling of waste lithium-ion battery cathode materials is mainly Li-containing waste liquid. + 、Na + 、H + and SO 4 2- aqueous solution, the pH of the solution is 4-5, and the lithium ion concentration is 7g / L.

[0040] Such as figure 1 Shown, a kind of method of the present invention extracts lithium from the lithium-containing waste liquid that waste lithium ion battery recovery process produces, comprises the following steps:

[0041] (1) Add 1.1 times the theoretical solubility of sodium carbonate solid into 200mL of lithium-containing waste liquid at 40°C to carry out the sodium carbonate lithium precipitation reaction, stir the reaction for 1 hour, and then filter and separate to obtain the lithium-precipitated liquid (filtrate) and crude lithium carbonate;

[0042] (2) Cool and crystallize the lithium-precipitated liquid (filtrate) obtained in step (1) at 8° C., filter and separate to obtain sodium carbon...

Embodiment 3

[0046] Lithium-containing waste liquid produced during the recycling of waste lithium-ion battery cathode materials is mainly Li-containing waste liquid. + 、Na + 、H + and SO 4 2- aqueous solution, the pH of the solution is 4-5, and the lithium ion concentration is 7g / L.

[0047] Such as figure 1 Shown, a kind of method of the present invention extracts lithium from the lithium-containing waste liquid that waste lithium ion battery recovery process produces, comprises the following steps:

[0048] (1) Add 1.05 times the theoretical solubility of sodium carbonate solid into 200mL of lithium-containing waste liquid at 70°C to carry out sodium carbonate lithium precipitation reaction, stir the reaction for 1 hour, and then filter and separate to obtain the lithium-precipitated liquid (filtrate) and crude lithium carbonate;

[0049] (2) Cool and crystallize the lithium-precipitated liquid (filtrate) obtained in step (1) at 10° C., filter and separate to obtain sodium carbonat...

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 discloses a method for extracting lithium from a lithium-containing liquid waste generated in a waste lithium-ion battery recycling process. The method comprises the following steps: (1) with sodium carbonate as a precipitator, adding the sodium carbonate to the lithium-containing liquid waste for stirring reaction, and then filtering the liquid waste to obtain a liquid after lithium deposition and crude lithium carbonate; and (2) mixing the crude lithium carbonate obtained in the step (1) with manganese carbonate evenly and then carrying out roasting treatment to obtain sodium-containing spinel lithium manganate. The method is high in lithium recovery rate, clean and environment-friendly; and products are abundant and diverse in variety.

Description

technical field [0001] The invention relates to the technical field of lithium recovery from waste lithium-ion batteries, in particular to a method for extracting lithium from lithium-containing waste liquid generated during the recovery process of waste lithium-ion batteries. Background technique [0002] Since its commercialization in 1990, lithium-ion batteries have been widely used due to their high specific capacity, long cycle life, wide operating temperature range, and no memory effect. With the rapid development of the lithium battery industry, my country has become the largest battery producer in the world, with an annual output of about 4 billion lithium-ion batteries and a steady growth rate of 15% per year. In 2014, the accumulative sales volume of new energy vehicles in my country was about 60,000, a year-on-year increase of 4 times, and it is expected to rank first in the world in 2015. In 2015, the cumulative amount of scrapped power batteries in my country w...

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
IPC IPC(8): H01M10/54C22B26/12C22B7/00
CPCC22B7/00C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 郭学益曹笑田庆华黄国勇
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com