Method for preparing lithium adsorbent through in-situ growth on alumina ball and lithium adsorbent

An in-situ growth and lithium adsorption technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as difficult industrial operation, poor fluidity and permeability, and loss of adsorbent, so as to improve adsorption capacity and facilitate adsorption , is conducive to the effect of mass transfer and diffusion

Pending Publication Date: 2022-05-06
BEIJING ORIGIN WATER FILM TECH
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  • Description
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  • Application Information

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Problems solved by technology

[0006] However, the aluminum-based lithium adsorbent is powdery, has poor fluidity and permeability, and has a high dissolution rate during the adsorption and elution process, which will cause the loss of the adsorbent and is not easy for industrial operation. Therefore, how to improve the aluminum The use efficiency of lithium-based adsorbents is a technical problem that needs to be solved at present

Method used

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  • Method for preparing lithium adsorbent through in-situ growth on alumina ball and lithium adsorbent
  • Method for preparing lithium adsorbent through in-situ growth on alumina ball and lithium adsorbent
  • Method for preparing lithium adsorbent through in-situ growth on alumina ball and lithium adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Al 2 o 3 A method for preparing a lithium adsorbent by in situ growth on a ball, comprising the following steps:

[0049] S1. Take white Al with a particle diameter of 2mm 2 o 3 2kg of pellets were soaked in 2L of hydrochloric acid solution with pH = 1 for 1 hour, and then etched Al with deionized water 2 o 3 The pellets were washed 3 times, and Al 2 o 3 The pellets were fully dried in an oven at 120°C for 4 hours to make Al 2 o 3 The water in the ball body is fully removed;

[0050] S2. take out the dried Al obtained in step S1 2 o 3 Spray the ball with 800mL LiCl solution with a concentration of 1mol / L on 2 o 3 Wet it on the ball, no flowable liquid can appear during the wetting process, and then put the wet LiCl-Al 2 o 3 Place the pellets in an oven at 120°C for 4 hours to fully remove the moisture in the body and obtain dry LiCl-Al 2 o 3 small ball;

[0051] S3. Use 400mL of AlCl with a substance concentration of 2mol / L 3 The solution is sprayed on...

Embodiment 2

[0056] Al 2 o 3 A method for preparing a lithium adsorbent by in situ growth on a ball, comprising the following steps:

[0057] S1. Take white Al with a particle diameter of 1.5mm 2 o 3 1 kg of pellets, soaked in 1 L of hydrochloric acid solution with pH = 1 for 1 h, and then etched Al with deionized water 2 o 3 The pellets were washed 3 times, and Al 2 o 3 The pellets were fully dried in an oven at 130°C for 3 hours to make Al 2 o 3 The water in the ball body is fully removed;

[0058] S2. take out the dried Al obtained in step S1 2 o 3 Spray the ball on the Al 2 o 3 Wet it on the ball, no flowable liquid can appear during the wetting process, and then put the wet LiCl-Al 2 o 3 Place the pellets in an oven at 130°C for 3 hours to fully dry the moisture in the body to obtain dry LiCl-Al 2 o 3 small ball;

[0059] S3. Use 200mL of AlCl with a substance concentration of 2mol / L 3 The solution is sprayed on the dry LiCl-Al obtained in step S2 2 o 3 On the ball...

Embodiment 3

[0064] Al 2 o 3 A method for preparing a lithium adsorbent by in situ growth on a ball, comprising the following steps:

[0065] S1. Take white Al with a particle diameter of 1.5mm 2 o 3 1.5 kg of pellets were soaked in 1.5 L of hydrochloric acid solution with pH = 1 for 2 hours, and then etched Al with deionized water 2 o 3 The pellets were washed 3 times, and Al 2 o 3 The pellets were fully dried in an oven at 150°C for 5 hours to make Al 2 o 3 The water in the ball body is fully removed;

[0066] S2. take out the dried Al obtained in step S1 2 o 3 Spray the ball on the Al 2 o 3 Wet it on the ball, no flowable liquid can appear during the wetting process, and then put the wet LiCl-Al 2 o 3 Place the pellets in an oven at 130°C for 3 hours to fully dry the moisture in the body to obtain dry LiCl-Al 2 o 3 small ball;

[0067] S3. Use 300mL of AlCl with a substance concentration of 2mol / L 3 The solution is sprayed on the dry LiCl-Al obtained in step S2 2 o 3...

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Abstract

The invention provides a method for preparing a lithium adsorbent through in-situ growth on Al2O3 spheres and the lithium adsorbent, and the preparation method comprises the following steps: S1, etching the Al2O3 spheres with acid, then cleaning and drying; s2, a LiCl solution is adopted to infiltrate the dried Al2O3 balls, then the Al2O3 balls are dried, and dry LiCl-Al2O3 balls are obtained; s3, the dry state LiCl-Al2O3 balls are soaked in an AlCl3 solution, and wet state AlCl3-LiCl-Al2O3 balls are obtained; s4, the wet AlCl3-LiCl-Al2O3 balls are infiltrated with a LiOH solution, then the wet AlCl3-LiCl-Al2O3 balls are subjected to a heating reaction at the temperature of 50 DEG C to 80 DEG C, and LiCl.Al2 (OH) 6. YH2O-Al2O3 balls are obtained; and S5, placing the LiCl.Al2 (OH) 6. YH2O-Al2O3 spheres in a LiCl solution, and carrying out standing so as to obtain the Li (1-x) Cl (1-x). Al2 (OH) 6. YH2O-Al2O3 sphere lithium adsorbent. According to the method and the lithium adsorbent, LiCl.Al2 (OH) 6.yH2O grows on the pore channels or the surfaces of the Al2O3 pellets, so that synthesis of effective components and granulation forming of the effective component powder are combined, the tedious processes of synthesizing the lithium adsorbent powder firstly and then forming the lithium adsorbent powder and the like are avoided, and the method and the lithium adsorbent have a great application prospect in the field of extraction of lithium by an adsorption method.

Description

technical field [0001] The invention belongs to the technical field of lithium ion adsorbents, in particular to a 2 o 3 A method for preparing a lithium adsorbent by in-situ growth on a sphere and the lithium adsorbent. Background technique [0002] Lithium and its salts are widely used in various industries and are an important strategic resource. A large number of domestic lithium resources are distributed in major salt lakes in Northwest China. my country's salt lakes are concentrated in the Qinghai-Tibet Plateau region, and Qinghai salt lakes generally have the characteristics of high magnesium-lithium ratio and low lithium content. [0003] Adsorption is a lithium extraction technology that has great advantages from an environmental and economic point of view. In particular, the advantages of extracting lithium from low-grade high-magnesium lithium are more obvious than brine and seawater. At present, the adsorbents are mainly divided into four types: manganese-bas...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30
CPCB01J20/08B01J20/046Y02P10/20
Inventor 陈亦力王杨莫恒亮李锁定彭文娟李天玉刘曼曼
Owner BEIJING ORIGIN WATER FILM TECH
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