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Preparation method of lithium ion sieve adsorbent particles for liquid lithium resource extraction

An adsorbent, lithium ion technology, applied in the field of lithium ion sieve adsorbent particle preparation, can solve the problems of poor water permeability of the adsorbent particle matrix material, slow adsorption process, reduced adsorption capacity, etc.

Active Publication Date: 2021-10-19
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Preparation method of lithium ion sieve adsorbent particles for liquid lithium resource extraction
  • Preparation method of lithium ion sieve adsorbent particles for liquid lithium resource extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A kind of adsorbent particles for liquid lithium resource extraction is carried out in the following manner:

[0075] Step 1, spinel-type Li 4 Ti 5 o 12 Dry it at 80°C, and crush it with a high-speed pulverizer to a particle size of 800-1000 mesh to obtain an adsorbent powder.

[0076] Step 2, dissolving polyvinyl alcohol with an alcoholysis degree of 85% in water to prepare a 10 wt% polyvinyl alcohol aqueous solution.

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

[0078] Step 4: Add a certain amount of the first crosslinking agent aqueous solution to the mixture obtained in step 3, wherein the mass ratio of the first crosslinking agent aqueous solution to the mixture and the first crosslinking agent solution is 1:2. The composition of the first crosslinking agent aqueous solution is 3wt% boric acid, 1wt% borax, 1wt% aluminum chloride, 1wt% calcium chloride, and ...

Embodiment 2

[0085] A kind of adsorbent particles for liquid lithium resource extraction is carried out in the following manner:

[0086] Step 1, spinel-type Li 1.6 mn 1.6 o 4 Dry it at 80°C, and crush it to a particle size of 800-1000 mesh by a high-speed pulverizer to obtain adsorbent powder;

[0087] Step 2, dissolving polyvinyl alcohol with a degree of alcoholysis 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 3 wt%.

[0089] Step 4: Mix the polymer aqueous solutions prepared in Step 2 and Step 3 at a mass ratio of 10:1, and use a high-viscosity stirring paddle to mix evenly to obtain a high-viscosity polymer mixed solution.

[0090] Step 5: Add the adsorbent powder in step 1 to the high-viscosity polymer mixture solution in step 4 and mix in a mass ratio of 1:3, stir or grind until uniform.

[0091] Step 6: Add a certain amount of th...

Embodiment 3

[0096] A kind of adsorbent particles for liquid lithium resource extraction is carried out in the following manner:

[0097] Step 1, spinel-type Li 4 Ti 5 o 12 The adsorbent powder is dried at 80°C and crushed by a high-speed pulverizer to a particle size of 800-1000 mesh to obtain the adsorbent powder;

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

[0099] Step 3, dissolving polyacrylic acid with an average molecular weight of 1.25 million in water to prepare a solution with a concentration of 4 wt%.

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

[0101] Step 5: Mix the polymer aqueous solution prepared in Step 2, Step 3, and Step 4 in 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 in step 1 to the high-viscosity polymer mixture solution in st...

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Abstract

The invention discloses a preparation method of lithium ion sieve type adsorbent particles for extracting lithium resources from liquid such as salt lake brine, seawater and underground water. The adsorbent particles take a water-absorbing polymer as a carrier, lithium ion sieve type adsorbents such as metatitanic acid type Li2TiO3, spinel type Li4Ti5O12, spinel type Li1.6Mn1.6O4 and spinel type LiMn2O4 are added in a high loading amount, and the adsorbent particles are prepared in a secondary cross-linking mode. The preparation process is simple and suitable for industrial production. The prepared adsorbent particles have the characteristics of high elasticity, porosity, high water absorption, good permeability and the like. A resin matrix is resistant to strong acid and strong alkali, a polyhydroxy structure on the surface of the matrix can effectively adsorb adsorbent particles, and the solution loss rate is effectively reduced. The method can be applied to extraction of lithium elements in salt lake raw brine, old brine, seawater and underground water resources, and meanwhile, the high-strength corrosion-resistant matrix is suitable for an industrial adsorption column process.

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 used for extracting liquid lithium resources. Background technique [0002] With the rapid development of lithium batteries, lithium alloys, lubricants and other industries, the market demand for lithium is increasing. Lithium resources in my country are mostly stored in salt lakes, groundwater, and seawater. These liquid lithium resources are low in content and coexist with a large amount of magnesium and calcium ions. They 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 brine. The lithium after precipitation needs to be dissolved a...

Claims

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Application Information

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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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