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A preparation method of lithium ion sieve adsorbent particles for extraction of liquid lithium resources

An adsorbent, lithium ion technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of reduced adsorption capacity, poor water permeability of adsorbent particle matrix materials, slow adsorption process, etc.

Active Publication Date: 2022-06-10
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] 3. The base material of the adsorbent particles has poor water permeability, the adsorption capacity decreases after granulation, and the adsorption process is relatively slow

Method used

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  • A preparation method of lithium ion sieve adsorbent particles for extraction of liquid lithium resources
  • A preparation method of lithium ion sieve adsorbent particles for extraction of liquid lithium resources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] An adsorbent particle for liquid lithium resource extraction is carried out in the following manner:

[0075] The first step, the spinel type Li 4 Ti 5 O 12 It is dried at 80°C and pulverized to a particle size of 800-1000 mesh by a high-speed pulverizer to obtain adsorbent powder.

[0076] In the second step, polyvinyl alcohol with an alcoholysis degree of 85% is dissolved in water to prepare a 10wt% polyvinyl alcohol aqueous solution.

[0077] Step 3: Mix the polyvinyl alcohol aqueous solution with the adsorbent powder in a mass ratio of 3:1, and use a three-roll mill to mix evenly.

[0078] The 4th step, adding a certain amount of the first cross-linking agent aqueous solution to the mixture obtained in the third step, wherein the first cross-linking agent aqueous solution wherein the mass ratio of the mixture to the first cross-linking agent solution is 1:2, the said The composition of the first crosslinking agent aqueous solution is 3wt% boric acid, 1wt% borax,...

Embodiment 2

[0085] An adsorbent particle for liquid lithium resource extraction is carried out in the following manner:

[0086] The first step, the spinel type Li 1.6 Mn 1.6 O 4 Drying at 80°C, pulverizing to a particle size of 800-1000 mesh by a high-speed pulverizer to obtain adsorbent powder;

[0087] Step 2: Dissolve polyvinyl alcohol with an alcoholysis degree of 85% in water to prepare a 10wt% solution

[0088] Step 3: Dissolving sodium polyacrylate with an average molecular weight of 1.25 million in water to prepare a solution with a concentration of 3wt%.

[0089] In the fourth step, the polymer aqueous solutions prepared in the second and third steps are mixed according to a mass ratio of 10:1, and mixed evenly with a high-viscosity stirring paddle to obtain a high-viscosity polymer mixed solution.

[0090] Step 5: Add the adsorbent powder from Step 1 into the high-viscosity polymer mixed solution from Step 4 and mix at a mass ratio of 1:3, and stir or grind until the mixtur...

Embodiment 3

[0096] An adsorbent particle for liquid lithium resource extraction is carried out in the following manner:

[0097] The first step, the spinel type Li 4 Ti 5 O 12 The adsorbent powder is dried at 80°C, and pulverized to a particle size of 800-1000 mesh by a high-speed pulverizer to obtain adsorbent powder;

[0098] Step 2: Dissolve polyvinyl alcohol with an alcoholysis degree of 85% in water to prepare a 10wt% solution

[0099] In the third step, polyacrylic acid with an average molecular weight of 1.25 million is dissolved in water to prepare a solution with a concentration of 4wt%.

[0100] Step 4. Dissolve sodium alginate in water to prepare a 3wt% solution

[0101] Step 5: Mix the polymer aqueous solutions prepared in steps 2, 3 and 4 according to a mass ratio of 10:1:1, and use a high-viscosity stirring paddle to mix evenly to obtain a high-viscosity polymer mixed solution.

[0102] Step 6: Add the adsorbent powder of Step 1 into the high-viscosity polymer mixed sol...

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Abstract

The invention discloses a method for preparing lithium ion sieve-type adsorbent particles used for extracting liquid lithium resources such as salt lake brine, seawater, and groundwater. The adsorbent particles use water-absorbing polymers as carriers, and add lithium-ion sieve-type adsorbents such as metatitanic acid-type Li 2 TiO 3 , spinel Li 4 Ti 5 o 12 , spinel Li 1.6 mn 1.6 o 4 , spinel LiMn 2 o 4 etc., and are prepared by secondary cross-linking. The preparation process is simple and suitable for industrial production. The prepared adsorbent particles have the characteristics of high elasticity, porosity, high water absorption and good permeability. The resin matrix is ​​resistant to strong acids and alkalis, and the polyhydroxyl structure on the surface of the matrix can effectively absorb adsorbent particles and effectively reduce the rate of dissolution loss. Corroded substrates are suitable for industrial adsorption column processes.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a method for preparing lithium ion sieve adsorbent particles for liquid lithium resource extraction. Background technique [0002] With the rapid development of lithium batteries, lithium alloys, lubricants and other industries, the market demand for lithium is increasing. Most of my country's lithium resources are stored in salt lakes, groundwater, and seawater. These liquid lithium resources are low in content and coexist with a large amount of magnesium, calcium and other ions, which need to be enriched and purified before they can be used. At present, the technologies for extracting lithium from liquid lithium resources such as salt lakes mainly include solvent extraction, precipitation and adsorption. The precipitation method is only suitable for systems with high lithium content such as old halogen. The precipitated lithium needs to be dissolved and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C22B3/24C22B26/12
CPCB01J20/267B01J20/28016C22B26/12C22B3/24
Inventor 董明哲李军刘忠钱志强火焱葛飞吴志坚
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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