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Lithium ion adsorbent as well as preparation method and application thereof

A technology of deionized water and vermiculite, which is applied in the field of economical environmental protection and resource utilization, can solve the problems of reducing the regeneration efficiency of adsorbents, deep embedment of adsorption sites, unfavorable lithium ion adsorption and desorption, etc., and is easy to promote in industrialization , simple operation, low cost effect

Active Publication Date: 2018-07-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium-ion imprinted polymers prepared by these methods have the following problems: the adsorption sites are buried too deeply, which is not conducive to the adsorption and desorption of lithium ions, and reduces the regeneration efficiency of the adsorbent

Method used

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  • Lithium ion adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Pretreatment of vermiculite

[0044] ① Nitric acid steam treatment of vermiculite

[0045] Weigh 1.5 g of crushed vermiculite with a particle size of less than 150 μm and put it into a self-assembled gas reflux device, add 150 mL of concentrated nitric acid, and heat it in an oil bath at 140°C for 2 hours.

[0046] Such as figure 1As shown, 1 place is concentrated nitric acid, 2 places are vermiculite, and 5 places are pistons. After heat treatment, the nitric acid turns into steam and volatilizes to 2 places. After the vermiculite is acid-treated, it volatilizes and enters 4 through the branch pipe. The nitric acid vapor becomes liquid droplets through the condensation pipe 3 and gathers at the bottom. Adjust the piston 5, Realize the recovery and utilization of nitric acid.

[0047] ②Put the vermiculite treated with nitric acid vapor into a beaker filled with 80mL of water, place it in an ultrasonic device, and conduct ultrasonic treatment for 3 hours. Then was...

Embodiment 2

[0065] 1) Pretreatment of vermiculite

[0066] ① Nitric acid steam treatment of vermiculite

[0067] Weigh 1.5 g of crushed vermiculite with a particle size of less than 150 μm and put it into a self-assembled gas reflux device, add 150 mL of concentrated nitric acid, and heat it in an oil bath at 140°C for 2 hours.

[0068] ②Put the vermiculite treated with nitric acid vapor into a beaker filled with 100mL of water, place it in an ultrasonic device, and conduct ultrasonic treatment for 3 hours. Then wash to neutral and dry for later use. According to BET analysis, the specific surface area of ​​vermiculite will increase correspondingly with the increase of treatment time.

[0069] 2) Preparation of lithium ion imprinted polymer

[0070] ① Add 10g of lithium nitrate, 7g of crown ether and 150μL of methacrylic acid into 150mL of a mixed solution of methanol and dimethylformamide, the volume ratio of methanol to dimethylformamide is 15:1, and then put it Stir in a 25°C water...

Embodiment 3

[0074] 1) Pretreatment of vermiculite

[0075] ① Nitric acid steam treatment of vermiculite

[0076] Weigh 1.5 g of crushed vermiculite with a particle size of less than 150 μm and put it into a self-assembled gas reflux device, add 150 mL of concentrated nitric acid, and heat it in an oil bath at 140 ° C for 8 hours.

[0077] ②Put the vermiculite treated with nitric acid vapor into a beaker filled with 100mL of water, and place it in an ultrasonic device for ultrasonic treatment for 10 hours. Then wash to neutral and dry for later use. According to BET analysis, the specific surface area of ​​vermiculite will increase correspondingly with the increase of treatment time.

[0078] 2) Preparation of lithium ion imprinted polymer

[0079] ①Add 0.1g of lithium nitrate, 0.02g of crown ether and 100μL of methacrylic acid into 40mL of a mixed solution of methanol and dimethylformamide, the volume ratio of methanol to dimethylformamide is 15:1, and then add It was placed in a 25°C...

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Abstract

The invention discloses a lithium ion adsorbent as well as a preparation method and application thereof. A vermiculite pretreatment method comprises the following steps: 1) crushing and sieving vermiculite so that a particle size of the vermiculite is less than 150 Mum; 2) treating the crushed vermiculite with nitric acid vapor for a set time, placing the treated vermiculite into deionized water,performing ultrasonic treatment for a set time; and 3) filtering the treated vermiculite and washing to be neutral to obtain the pretreated vermiculite. The pretreated vermiculite is used as a carrier, lithium nitrate is used as a template molecule, crown ether is used as a chelating agent, and methacrylic acid is used as a functional monomer to perform free polymerization reaction under action ofa crosslinking agent and an initiator so as to form a stable lithium ion imprinted polymer, wherein the lithium ion imprinted polymer has good selective adsorption performance for lithium ions and has relatively good regeneration performance.

Description

technical field [0001] The invention relates to a lithium ion adsorbent, a preparation method thereof, and an application of the lithium ion adsorbent in the field of lithium extraction from salt lake brine, belonging to the technical category of economical environmental protection and resource utilization. Background technique [0002] Vermiculite is a 2:1 layered silicate clay mineral. Its structural unit layer is a layered crystal layer formed by silicon-oxygen tetrahedron and aluminum-oxygen octahedron. There are interacting van der Waals forces between the crystal layers. . Vermiculite has abundant reserves, wide sources, low cost, and relatively simple treatment process. It has been widely used in traditional fields such as construction, agriculture, forestry, and gardening. In addition, due to its good adsorption and ion exchange properties, it is also used to treat heavy metal ions in industrial wastewater. With the advancement of research methods and the demand fo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01D15/38C02F1/28C08F222/14C08F220/06C08K9/00C08K9/02C08K3/34C08J9/26C02F101/10
CPCB01D15/3852B01J20/12B01J20/268B01J20/3085C02F1/285C02F1/288C02F2101/10C08F222/14C08J9/009C08J9/26C08K3/346C08K9/00C08K9/02C08F220/06
Inventor 王睿黄岩
Owner SHANDONG UNIV
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