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

Preparation method of high-activity lithium carbonate

A technology of lithium carbonate and high activity, applied in lithium carbonate; highly active effect

Inactive Publication Date: 2020-07-17
蒋央芳
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of lithium carbonate or lithium hydroxide with matching properties such as high activity, particle size, and morphology can effectively improve the performance of positive electrode materials and reduce costs. At present, the synthesis of lithium carbonate and lithium hydroxide mostly stays in the extraction process and chemical purity. In terms of research on the physical properties of products, there are few

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
  • Preparation method of high-activity lithium carbonate
  • Preparation method of high-activity lithium carbonate
  • Preparation method of high-activity lithium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of highly active lithium carbonate, it is the following steps:

[0036] (1) Lithium salt is mixed with lithium solution, and lithium concentration is 10g / L, prepares alkali solution, and the concentration of alkali solution is 9mol / L, prepares ammonium bicarbonate solution, and the concentration of ammonium bicarbonate is 180g / L;

[0037] (2) Convectively add the lithium solution, alkali solution, and ammonium bicarbonate solution into the reaction kettle, add the bottom liquid into the reaction kettle, maintain the pH value of the solution during the convective addition process, and the convective addition time is 60min, and continue the reaction after the addition is completed 2h, the temperature of the entire convective addition process and reaction process is 55°C;

[0038] (3) After the reaction is completed, filter, wash until the conductivity of the washing water is less than or equal to 100 μS / cm, then dry, and use microwave drying f...

Embodiment 2

[0050] A kind of preparation method of highly active lithium carbonate, it is the following steps:

[0051] (1) Lithium salt is mixed with lithium solution, and lithium concentration is 22g / L, prepares alkali solution, and the concentration of alkali solution is 9mol / L, prepares ammonium bicarbonate solution, and the concentration of ammonium bicarbonate is 200g / L;

[0052] (2) Convectively add the lithium solution, alkali solution, and ammonium bicarbonate solution into the reaction kettle, add the bottom liquid into the reaction kettle, maintain the pH value of the solution at 11.5 during the convective addition process, and the convective addition time is 50min, and continue the reaction after the addition is completed 2h, the temperature of the entire convective addition process and reaction process is 55°C;

[0053] (3) After the reaction is completed, filter, wash until the conductivity of the washing water is less than or equal to 100 μS / cm, then dry, and use microwave ...

Embodiment 3

[0065] A kind of preparation method of highly active lithium carbonate, it is the following steps:

[0066] (1) Lithium salt is mixed with lithium solution, and lithium concentration is 18g / L, prepares alkali solution, and the concentration of alkali solution is 8mol / L, prepares ammonium bicarbonate solution, and the concentration of ammonium bicarbonate is 190g / L;

[0067] (2) Convectively add the lithium solution, alkali solution, and ammonium bicarbonate solution into the reaction kettle, add the bottom liquid into the reaction kettle, maintain the pH value of the solution at 10.9 during the convective addition process, and the convective addition time is 40min, and continue the reaction after the addition is completed 2h, the temperature of the entire convective addition process and reaction process is 55°C;

[0068] (3) After the reaction is completed, filter, wash until the conductivity of the washing water is less than or equal to 100 μS / cm, then dry, and use microwave ...

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

PropertyMeasurementUnit
electrical conductivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of high-activity lithium carbonate. The preparation method comprises adding a lithium solution, an alkali solution and an ammonium bicarbonate solution into a reaction kettle in a convection manner, adding a base solution into the reaction kettle, after the reaction is finished, filtering and washing until the conductivity of washing water is less thanor equal to 100 [mu]S / cm, then drying by adopting microwave, introducing carbon dioxide gas for activation in the drying process, stopping drying until the mass fraction of free water of the materialis less than or equal to 1%, screening, removing iron, and packaging to obtain the high-activity lithium carbonate. The purified lithium salt solution, ammonium bicarbonate and alkaline solution are added into the reaction kettle at a certain flow rate to react, the reaction temperature, the pH value and the CO3<2-> concentration are controlled so that the battery-grade lithium carbonate with highactivity, small primary particle size and high sphericity is obtained, and carbon dioxide is adopted to activate the surface of the lithium carbonate in the microwave drying process, so that the activity of the lithium carbonate is further improved, and the high-activity lithium carbonate is obtained through screening and iron removal.

Description

technical field [0001] The invention relates to a preparation method of highly active lithium carbonate, which belongs to the technical field of preparation of lithium battery materials. Background technique [0002] As the basic lithium salt of lithium, lithium carbonate is widely used in rechargeable batteries, additives and fluxes in glass manufacturing and ceramic production, lubricants, air conditioners and other industries. In glass manufacturing—mainly the production process of cathode picture tube, heat-resistant glass, glass fiber and optical glass, lithium carbonate can not only reduce the aging and melting temperature of glass, increase the density and strength of glass, but also improve the viscosity of glass , thermal expansion and many other important properties. In the ceramic manufacturing process, adding an appropriate amount of lithium carbonate can increase the transparency of the product, increase wear resistance, reduce the expansion coefficient and mel...

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 Applications(China)
IPC IPC(8): C01D15/08B82Y40/00
CPCB82Y40/00C01D15/08C01P2004/32C01P2004/45C01P2004/61C01P2004/64C01P2006/12C01P2006/80
Inventor 蒋央芳
Owner 蒋央芳
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