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High-selectivity cauliflower-shaped lithium ion absorbent, and preparation method and application

A high-selectivity, lithium-ion technology, applied in the direction of selective adsorption, ion exchange, ion exchange regeneration, etc., can solve the problems of low selectivity, no specific recognition ability, etc., to achieve short process, good stability and regeneration cycle. , the effect of good adsorption effect

Inactive Publication Date: 2017-12-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most adsorbents have no specific recognition ability and have low selectivity to a single metal. Therefore, it is particularly urgent to prepare an adsorbent with high selectivity.

Method used

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  • High-selectivity cauliflower-shaped lithium ion absorbent, and preparation method and application
  • High-selectivity cauliflower-shaped lithium ion absorbent, and preparation method and application
  • High-selectivity cauliflower-shaped lithium ion absorbent, and preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dissolve 12-crown-4-ether (20mg) and lithium perchlorate (20mg) in 50mL of acetonitrile solution, mix thoroughly; then add acrylamide (60mg), stir slowly at room temperature for 10min; then add N'N -Methylenebisacrylamide (90mg) and azobisisobutyronitrile (20mg), through N 2 10min, placed in a water bath shaker at 60°C for 24h; finally, the centrifuged product was washed with methanol for more than 3 times, after drying, pickled in 0.5mol / L HCl solution to remove lithium ions, and dried Obtain the imprinted polymer.

[0027] figure 1 is the scanning electron microscope image of the adsorbent, where (A) is a low-magnification scanning electron microscope image, and (B) is a high-magnification scanning electron microscope image. It can be seen from the figure that the shape of the polymer is like a cauliflower, and the shape is relatively uniform .

[0028] figure 2 is the IR diagram of the adsorbent, from which the distribution of peaks can be analyzed, and the pol...

Embodiment 2

[0033] Dissolve 12-crown-4-ether (20mg) and lithium perchlorate (20mg) in 50mL of acetonitrile solution, mix thoroughly; then add acrylamide (40mg), stir slowly at room temperature for 10min; then add N'N- Methylenebisacrylamide (80mg) and azobisisobutyronitrile (20mg), through N 2 15min, placed in a water bath shaker at 60°C for 24h; finally, the centrifuged product was washed with methanol for more than 3 times, after drying, pickled in 1.0mol / L HCl solution to remove lithium ions, and dried Obtain the imprinted polymer.

Embodiment 3

[0035] Dissolve 12-crown-4-ether (30mg) and lithium perchlorate (20mg) in 50mL of acetonitrile solution, mix thoroughly; then add acrylamide (60mg), stir slowly at room temperature for 15min; then add N'N- Methylenebisacrylamide (120mg) and azobisisobutyronitrile (20mg), through N 2 10min, placed in a water bath shaker at 60°C for 24h; finally, the centrifuged product was washed with methanol for more than 3 times, after drying, pickled in 2.0mol / L HCl solution to remove lithium ions, and dried Obtain the imprinted polymer.

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Abstract

The invention relates to a high-selectivity cauliflower-shaped lithium ion absorbent, and a preparation method and an application, and belongs to the technical field of preparation of environmental-function materials. The preparation method comprises the following steps of: firstly dissolving 12 crown-4-ether and lithium perchlorate in acetonitrile solution, and fully and uniformly mixing; then adding acrylamide, and slowly stirring for a period of time at a normal temperature; then adding N' N-methylene bisacrylamide and azodiisobutyronitrile, introducing N2 for minutes, then sealing, putting in a water-bathing oscillator, and oscillating at a constant temperature and standing for a night; and finally, washing by using methyl alcohol and drying products obtained by centrifugation, carrying out acid washing in diluted HCl solution, washing off lithium ions, and drying to obtain the cauliflower-shaped lithium ion absorbent (Li-IIP). The Li-IIP prepared can recognize and separate the lithium ions selectively.

Description

technical field [0001] The invention relates to a highly selective cauliflower-shaped lithium ion adsorbent, a preparation method and application, and belongs to the technical field of preparation of environmental functional materials. Background technique [0002] With the rapid development of electronic equipment, the demand for lithium batteries is increasing. Since 2006, lithium batteries have maintained an annual growth rate of 14.5%. The extensive use of lithium batteries has made the recycling of lithium batteries more and more concerned. . Waste lithium batteries contain a large amount of metal and electrolyte solutions such as waste acid and alkali, etc., which have been exposed to the ground or buried underground for a long time. The battery casing is slowly corroded, and the metal in the battery gradually penetrates into the soil and water, causing pollution, such as a button battery. It can pollute 600 cubic meters of water. As a main metal in batteries, lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30B01D15/08
CPCB01D15/08B01J20/268B01J20/28014B01J2220/4806B01J2220/4812
Inventor 张宇锋戴江栋崔久云刘思玮李春香闫永胜周志平
Owner JIANGSU UNIV
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