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Method for recovering silver ions from tantalum electrolytic capacitor by using novel chelate resin

A chelating resin, a new type of technology, applied in the field of chelating adsorption functional resin synthesis, can solve the problem of poor single ion selectivity, and achieve the effects of high mechanical strength and physical stability, large adsorption capacity, and large chemical stability.

Inactive Publication Date: 2016-03-23
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that chloromethylated polystyrene alkoxycarbonyl thiourea resin has a strong effect on Ag + It has a good adsorption effect, and its adsorption capacity can reach 4.48mmol / g, but its selectivity to single ions is poor

Method used

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  • Method for recovering silver ions from tantalum electrolytic capacitor by using novel chelate resin
  • Method for recovering silver ions from tantalum electrolytic capacitor by using novel chelate resin
  • Method for recovering silver ions from tantalum electrolytic capacitor by using novel chelate resin

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Embodiment 1

[0035] 1) Accurately weigh 60.0mg of chlorine spheres, transfer them into a 100mL three-necked bottle, add 40mL of N,N-dimethylformamide (DMF) and soak overnight until the chlorine spheres swell;

[0036] 2), add 2-amino-4-picoline as a ligand to the result of step 1), add sodium as a catalyst under the protection of nitrogen and keep stirring at a reaction temperature of 80°C (rotating speed is 300r / min ) reacted for 10 hours, wherein, 2-amino-4-picoline and -CH on the chlorine ball 2 The ratio of Cl to substance is 4:1;

[0037] 3), after the reaction is finished, filter the product of step 2) to obtain a filter cake, and soak and wash the obtained filter cake with N,N-dimethylformamide (DMF) for 3 to 4 times (each dosage is 40ml) , then wash with distilled water, absolute ethanol, acetone, ether, distilled water successively, repeat 4 times (each time, the consumption of distilled water is 40ml, the consumption of acetone is 40ml, the consumption of ether is 40ml, the cons...

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Abstract

The invention discloses a method for recovering silver ions from a tantalum electrolytic capacitor by using novel chelate resin. A preparation method for the chelate resin comprises the following steps: (1) soaking chlorine spheres in N,N-dimethylformamide, which serves as a reaction solvent, until the chlorine spheres are thoroughly swollen; (2) adding 2-amino-4-methylpyridine, which serves as a ligand, and sodium, which serves as a catalyst, into a product of the step (1), and carrying out stirred reaction for 10 hours at the temperature of 80 DEG C under nitrogen protection, wherein the mass ratio of 2-amino-4-methylpyridine to -CH2Cl in the chlorine spheres is 4: 1; and (3) filtering a product of the step (2) so as to obtain a filter cake, firstly, washing the filter cake with the reaction solvent by soaking until a washing solution is colorless, then, washing the filter cake with distilled water, then, repeatedly washing the filter cake with anhydrous ethanol, acetone, diethyl ether and distilled water sequentially, and carrying out vacuum drying on the filter cake at the temperature of 50 DEG C, thereby obtaining the novel chelate resin. The method has the characteristics that the novel chelate resin selectively adsorbs the silver ions in the tantalum electrolytic capacitor, is good in adsorption performance, can be reused and the like.

Description

technical field [0001] The invention relates to a synthesis method and performance research of a chelating adsorption functional resin, in particular to a novel chelating resin capable of selective recovery of silver ions in waste tantalum electrolytic capacitors, good adsorption performance and reusability, its preparation method and application. Background technique [0002] Silver is very common in life and industrial production. Due to its unique chemical and physical properties, it is widely used in modern technology and industrial fields such as automobiles, photographic equipment, electronic appliances, aerospace, communications, and computers. And many silver-containing industrial products become waste products after a certain period of use, and most of the silver in these waste products exists in the form of solution, and its solution is more likely to pollute the environment, and silver is a very expensive precious metal , so how to recycle these waste liquids has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C22B7/00C22B11/00C01G5/02
CPCB01J20/265C01G5/02C22B11/046Y02P10/20
Inventor 张祥虞亲雅闵敏熊春华张润润
Owner ZHEJIANG GONGSHANG UNIVERSITY
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