Industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate

A technology of high-purity lithium carbonate and lithium carbonate, which is applied in the direction of lithium carbonate;/acid carbonate, etc., can solve the problems of inapplicability to large-scale industrial production, achieve good market application prospects, reduce consumption, and save water rate effect

Active Publication Date: 2013-10-16
四川长和华锂科技有限公司
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The literature reports on the preparation of high-purity lithium carbonate by the existing carbonization method are all laboratory methods, which are not suitable for large-scale industrial production

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
  • Industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate
  • Industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate
  • Industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1 Industrialized method for directly producing battery-grade lithium carbonate using carbonate-type salt lake lithium concentrate

[0055] According to figure 1 The process flow shown to prepare battery-grade lithium carbonate:

[0056] (1), ground

[0057] ① Take carbonate type salt lake lithium concentrate (such as Tibet carbonate type salt lake lithium concentrate). This type of lithium concentrate can be obtained through purchase, or can be obtained by extracting lithium resources from salt lake brine using conventional processes.

[0058] The chemical composition of the lithium mine:

[0059] Li 2 O: 10.0~30.0% Na + :5.0~16.5% K + :2.6~4.0%

[0060] CO 3 2- :8.0~56.0% Cl - :8.0~11.0% SO 4 2- :1.5~4.0%

[0061] Ca 2+ :0.4~1.5% Mg 2+ :0.4~5.0%

[0062] ②Coarse crushing Direct crushing of materials with particle size ≤5mm;

[0063] ③Drying The drying temperature is ≤350℃, and the moisture content of the material is ≤3%;

[0064] ④Fine grinding adopts ultra-fine grinding mat...

Embodiment 2

[0096] Example 2 Industrialized method for directly producing high-purity lithium carbonate using carbonate-type salt lake lithium concentrate

[0097] With reference to the method in Example 1, first prepare Li 2 CO 3 Wet boutique Carry out the second carbonization, the steps are as follows:

[0098] 1. Secondary carbonization

[0099] Secondary hydrogenation, take primary Li 2 CO 3 Wet boutique Add pure water, Li 2 CO 3 Mother liquor Or wash The second hydrogenation is carried out in one or several mixed liquids, and the specific methods and conditions are the same as that of the primary hydrogenation

[0100] Secondary impurity removal Add ethylenediaminetetraacetate lithium salt, oxalic acid, lithium oxalate, phosphoric acid, lithium phosphate, lithium dihydrogen phosphate, etc. for impurity removal and filtration, precipitation Mainly incompletely reacted Li 2 CO 3 And a small amount of slag left by the removal of impurities, the precipitation It is used for special treat...

Embodiment 3

[0116] Example 3 Industrialized method for preparing battery-grade lithium carbonate using industrial-grade lithium carbonate or its inferior products

[0117] According to figure 1 The process flow shown to prepare battery-grade lithium carbonate:

[0118] 1 carbonization

[0119] One-time hydrogenation to take industrial grade lithium carbonate or its inferior product (Li 2 O: 38.0~40.3%), add pure water and Li 2 CO 3 Wash water Or Li 2 CO 3 Mother liquor In one or several mixed liquids, the lithium-containing solid ⑨ dosage is 3000kg~6000kg, and the liquid dosage is 50~100m 3 In the hydrogenation reactor provided by the present invention (see Example 3 for the hydrogenation reactor), CO 2 , Temperature≤25℃, time is 1~2h, pressure is 0.2~0.3MPa, the end point is hydrogenated liquid pH 7.0~8.5, the flow rate of the material in the circulation pipe is 3~5m / s, each kettle can prepare hydrogenation liquid 50~ 100m 3 .

[0120] Impurity removal After hydrogenation treatment, add oxal...

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
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides an industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate. The industrial method comprises the following steps of: carbonizing; placing a carbonate-type lithium source in a hydriding reaction kettle for one time or more than two times of carbonization to obtain a wet lithium carbonate product, wherein the content of Li2O in the lithium source is 5.0-40.3% (w / w); and drying the wet lithium carbonate product obtained by one-time carbonization, thus obtaining battery-grade lithium carbonate; or drying the wet lithium carbonate product obtained by more than two times of carbonization, thus obtaining high-purity lithium carbonate. The method provided by the invention can continuously produce battery-grade lithium carbonate or high-purity lithium carbonate on large scale, is low in energy consumption and environmentally friendly and has strong practical value.

Description

Technical field [0001] The invention relates to a method for preparing high-purity lithium carbonate, in particular to a method for industrially producing high-purity lithium carbonate and battery-grade lithium carbonate. Background technique [0002] Lithium is the lightest known silver-white alkali metal with the smallest nuclear radius. Because lithium and its compounds have many unique excellent properties, they are widely used in glass, ceramics, lubrication, electronics, metallurgy, medicine, refrigeration, aerospace, etc. field. With the rising demand for clean energy, lithium energy will likely have a profound impact on human life, and it is also known as the "new energy resource of the 21st century". [0003] Lithium carbonate is an important lithium salt with a wide range of uses and strong market application value. According to GB / T 11075-2003, GB 10576-89, YS / T 582-2006 and other relevant national standards and industry standards, lithium carbonate can be divided into...

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): C01D15/08
Inventor 苏康杜洪文向东
Owner 四川长和华锂科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap