Method for manufacturing battery grade lithium carbonate by industrial grade lithium carbonate

A lithium carbonate, industrial-grade technology, applied in the field of new energy-new high-efficiency energy conversion and storage, can solve the problems of low purity of battery-grade lithium carbonate, unsuitability for large-scale production, troublesome reaction conditions, etc. Short reaction time and high conversion efficiency

Inactive Publication Date: 2018-03-16
大余县旭日矿业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing process for producing battery-grade lithium carbonate with industrial-grade lithium carbonate is complex, and the reaction conditions are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1, get technical grade lithium carbonate and be dissolved in the distilled water of 40 degree and be mixed with the lithium carbonate slurry that material concentration is 90g / L;

[0019] Step 2, at normal temperature, take EDTA and sodium hydroxide solution and mix uniformly to obtain a mixed solution of EDTA and sodium hydroxide, the mass ratio of EDTA and sodium hydroxide solution is 0.5:6, The concentration of sodium hydroxide solution is 25g / L, standby;

[0020] Step 3: Lithium carbonate slurry is sent into the rotating packed bed, and CO is passed into the rotating packed bed 2 Gas, obtain feed liquid after carrying out the carbonization reaction of 40min; Wherein, the feeding speed of controlling the lithium carbonate slurry is 100mL / min The rotating speed of the packed bed is 30Hz, and CO 2 The gas flow rate is 0.1m 3 / L;

[0021] Step 4: Add the mixed solution of ethylenediaminetetraacetic acid and sodium hydroxide solution to the feed liquid of step 3,...

Embodiment 2

[0025] Step 1, get technical grade lithium carbonate and be dissolved in the distilled water of 60 degree and be mixed with the lithium carbonate slurry that material concentration is 100g / L;

[0026] Step 2, at normal temperature, take EDTA and sodium hydroxide solution and mix uniformly to obtain a mixed solution of EDTA and sodium hydroxide, the mass ratio of EDTA and sodium hydroxide solution is 0.5:6, The concentration of sodium hydroxide solution is 25g / L, standby;

[0027] Step 3: Lithium carbonate slurry is sent into the rotating packed bed, and CO is passed into the rotating packed bed 2 Gas, after carrying out the carbonization reaction of 100min, obtain feed liquid; Wherein, the feeding speed of controlling lithium carbonate slurry is 400mL / min The rotating speed of packing bed is 50Hz, and CO 2 The gas flow rate is 0.2m 3 / L;

[0028] Step 4: Add the mixed solution of ethylenediaminetetraacetic acid and sodium hydroxide solution to the feed liquid of step 3, and...

Embodiment 3

[0032] Step 1, get technical grade lithium carbonate and be dissolved in the distilled water of 50 degree and be mixed with the lithium carbonate slurry that material concentration is 95g / L;

[0033] Step 2, at normal temperature, take EDTA and sodium hydroxide solution and mix uniformly to obtain a mixed solution of EDTA and sodium hydroxide, the mass ratio of EDTA and sodium hydroxide solution is 0.5:6, The concentration of sodium hydroxide solution is 25g / L, standby;

[0034] Step 3: Lithium carbonate slurry is sent into the rotating packed bed, and CO is passed into the rotating packed bed 2 Gas, obtain feed liquid after carrying out the carbonization reaction of 50min; Wherein, the feeding speed of controlling lithium carbonate slurry is 250mL / min The rotating speed of packing bed is 50Hz, and CO 2 The gas flow rate is 0.1m 3 / L;

[0035] Step 4: Add the mixed solution of ethylenediaminetetraacetic acid and sodium hydroxide solution to the feed liquid of step 3, and th...

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PUM

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Abstract

The invention discloses a method for manufacturing battery grade lithium carbonate by industrial grade lithium carbonate. The method includes the steps: dissolving the industrial grade lithium carbonate in distilled water to prepare lithium carbonate slurry; uniformly mixing ethylenediamine tetraacetic acid and sodium hydroxide solution to obtain ethylenediamine tetraacetic acid and sodium hydroxide mixed solution; feeding the lithium carbonate slurry into a rotating packed bed, leading CO2 gas into the rotating packed bed and performing carbonization reaction to obtain feed liquid; adding theethylenediamine tetraacetic acid and sodium hydroxide mixed solution into the feed liquid, and sufficiently stirring the mixed solution and the feed liquid to obtain mixed feed liquid; performing solid-liquid separation on the mixed feed liquid to obtain lithium bicarbonate solution; adding the lithium bicarbonate solution into a negative pressure device, decomposing lithium bicarbonate and precipitating the battery grade lithium carbonate. Compared with the prior art, the method is simple in process, convenient in operation, beneficial to batch production, short in reaction time, high in conversion efficiency, efficient in resource utilization and wide in application prospect.

Description

technical field [0001] The invention relates to the fields of new energy-new high-efficiency energy conversion and storage technology-advanced green battery material manufacturing process and production technology, especially a method for producing battery-grade lithium carbonate using industrial-grade lithium carbonate. Background technique [0002] With the rapid development of low-carbon economy and green new energy industry, especially with the breakthrough and popularization and application of large-capacity power battery technology, the new lithium electric vehicle industry has risen rapidly. The demand has stepped out of the traditional limitations of "industrial monosodium glutamate" and ushered in a new era of "energy metals". Lithium carbonate is an important chemical raw material. With the introduction of the national new energy development plan, lithium battery new energy has become one of the energy industries supported by the state; and lithium carbonate is an ...

Claims

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Application Information

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IPC IPC(8): C01D15/08
CPCC01D15/08C01P2006/80
Inventor 谭运全谭子峻
Owner 大余县旭日矿业科技有限公司
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