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Preparation method of granular lithium adsorbent

A technology of lithium adsorption and particles, which is applied in the field of preparation of granular lithium adsorbents to achieve the effects of good hydrophilicity, low cost and small difference

Inactive Publication Date: 2019-01-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, since these adsorbents are in the powder state after synthesis, they cannot be directly applied to conventional equipment such as fixed beds for adsorption-desorption lithium extraction.

Method used

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  • Preparation method of granular lithium adsorbent
  • Preparation method of granular lithium adsorbent

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preparation example Construction

[0036] Li 4 mn 5 o 12 The preparation method of the powder comprises the following steps: after fully grinding the lithium carbonate and manganese carbonate powders in a molar ratio of 1:2.5, calcining at a temperature of 400° C. for more than 24 hours to obtain Li 4 mn 5 o 12 powder.

[0037] Aluminum salt adsorbent powder (LiCl 2Al(OH) 3 ·nH 2 O, the value range of n is 0-2) the preparation method comprises the following steps: the concentration is 2.28mol L -1 Lithium chloride with a concentration of 3.8mol L -1 Aluminum chloride mixed solution 175mL, with a concentration of 6mol L -1 100mL of sodium hydroxide solution was stirred and reacted, and at 80°C, using deionized water, delithiated at a ratio of 50mL / g powder for 1h to obtain aluminum salt adsorbent powder.

[0038] Li 4 Ti 5 o 12 The preparation method of the powder comprises the following steps: after fully grinding lithium carbonate and titanium dioxide powder at a mass ratio of 1.05:2.5, calcining a...

Embodiment 1

[0040] Under normal pressure and temperature at 80°C, dissolve 5.00g polyvinylidene fluoride and 1.00g polyvinyl alcohol in 20mL acetone, add 10g Li 4 mn 5 o 12 Ultrafine powder and 2.0g sodium chloride powder were stirred with a high-speed homogenizer for 8 minutes to obtain a uniform mixture; the mass ratio of various polymer polyvinylidene fluoride to organic solvents was 0.38:1; the pore-forming agent sodium chloride and organic The mass ratio of the solvent is 0.13:1; the mass ratio of the lithium adsorbent or its precursor powder to the organic solvent is 0.63:1.

[0041] Use droppers of different calibers to drop the above homogeneous mixture into 100 mL of the mixed solution of water and ethanol with a volume ratio of 1:1, the mass ratio of the homogeneous mixture to the solution is 0.02:1, and the distance between the homogeneous mixture and the solution is 0.5 m, to obtain granular manganese-based lithium ion sieve precursors with a particle size of 0.8-3.3mm, and ...

Embodiment 2

[0043] Under normal pressure and temperature at 50°C, dissolve 4.50g ABS resin and 2.00g polyvinylpyrrolidone in 20mL chloroform, add 9g aluminum salt adsorbent powder LiCl·2Al(OH) 3 Mix with 0.5g sodium chloride powder and stir with a high-speed homogenizer for 8 minutes to obtain a uniform mixture; the mass ratio of various polymers to organic solvents is 0.22:1; the mass ratio of pore-forming agent sodium chloride to organic solvents is 0.017:1 ; The mass ratio of the lithium adsorbent or its precursor powder to the organic solvent is 0.3:1.

[0044] Use a syringe to drop the above-mentioned homogeneous mixture into 100mL of a mixed solution of water and ethanol with a volume ratio of 1:1, the mass ratio of the homogeneous mixture to the solution is 0.02:1, and the distance between the homogeneous mixture and the solution is 0.3m to obtain the particle size The aluminum salt adsorbent precursor of 1.0 mm was washed three times with 100 mL of deionized water to obtain a gran...

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Abstract

The invention discloses a preparation method of a granular lithium adsorbent. The preparation method comprises the following steps: mixing powder of a lithium adsorbent or a precursor thereof, a plurality of types of polymers, a pore-forming agent and an organic solvent under the conditions of normal pressure and the temperature of 10 to 190 DEG C; stirring for 1 to 120min to obtain a uniform mixture; dropping the uniform mixture into a solution, or extruding, molding and crushing the uniform mixture; washing to obtain the granular lithium adsorbent. The granular lithium adsorbent prepared bythe preparation method of the granular lithium adsorbent, provided by the invention, has the advantages of high granular strength and good toughness; after being put into a fixed bed or an adsorptiontower, the granular lithium adsorbent is not easy to crush and pulverize and has good hydrophilicity; after the granular lithium adsorbent is molded, the adsorption amount difference from powder is small; the technology is simple; after being rectified, the solvent is recycled, so that the cost is low and the pollution to the environment is small, and the granular lithium adsorbent is applicable to industrialized application.

Description

technical field [0001] The invention belongs to the technical field of chemical extraction, and in particular relates to a preparation method of a granular lithium adsorbent used in lithium-containing solutions such as salt lake brine, seawater, geothermal water, and solid waste leaching solution. Background technique [0002] At present, problems such as energy shortage, resource scarcity and environmental pollution are threatening the healthy development of human civilization. Facing the severe situation of environmental degradation, it has become the consensus of mankind to significantly reduce the exploitation and use of fossil energy and develop new renewable energy. Lithium batteries have the characteristics of high specific energy, low self-discharge, high cycle life, and no memory effect. They are currently the most promising high-efficiency secondary batteries and the fastest-growing chemical energy storage power sources. The development and application of lithium b...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F101/10C02F103/00C02F103/08
CPCB01J20/04B01J20/08B01J20/28004B01J20/3042C02F1/281C02F1/288C02F2101/10C02F2103/007C02F2103/08
Inventor 孙淑英刘东帆于建国
Owner EAST CHINA UNIV OF SCI & TECH
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