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Method of reclaiming silver from silver ion containing solution by polydiaminoanthraquinone as adsorbent

A polydiaminoanthracene and silver ion solution technology is applied in the field of silver recovery, can solve problems such as polydiaminoanthraquinone that have not yet been seen, and achieves the effects of good heavy metal ion adsorption selectivity, low price, and easy availability of raw materials

Inactive Publication Date: 2007-08-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report of polydiaminoanthraquino

Method used

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  • Method of reclaiming silver from silver ion containing solution by polydiaminoanthraquinone as adsorbent
  • Method of reclaiming silver from silver ion containing solution by polydiaminoanthraquinone as adsorbent

Examples

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Embodiment 1

[0015] In a 50mL dry Erlenmeyer flask, add 50mg of doped polydiaminoanthraquinone polymer (particle size: 20-80nm) and 25mL of 0.09615mol / L silver ion solution, put the Erlenmeyer flask into an ultrasonic oscillator Shake for 30-90 minutes, then take it out, and put it in a water bath at 30°C for 24 hours with stirring and adsorption. Filter through filter paper, and analyze the concentration of residual silver ions after adsorption by Volhard's titration method. The adsorption capacity is 467.1 mg / g. The adsorbed silver was confirmed to be elemental silver by the wide-angle X-ray diffraction pattern (Fig. 1). Other conditions are the same, and the corresponding de-doped polymer is used instead, and the adsorption capacity is 560.5mg / g. It can be seen that the performance of the dedoped state is better than that of the doped state.

Embodiment 2

[0017] In a 50mL dry Erlenmeyer flask, add 50mg of doped polydiaminoanthraquinone polymer (particle size 20-80nm) and 30mL of 0.083mol / L silver ion solution, put the Erlenmeyer flask into an ultrasonic oscillator for ultrasonic oscillation After 1 hour of treatment, it was taken out and placed in a water bath at 30°C for 24 hours with stirring and adsorption. Filter through filter paper, and analyze the concentration of silver ions after adsorption by Volhard's titration method. The adsorption capacity is 327.0mg / g. Other conditions are the same, and the corresponding de-doped polymer is used instead, and the adsorption capacity is 460.7mg / g. It can be seen that the performance of the dedoped state is better than that of the doped state.

Embodiment 3

[0019] In a 50mL dry Erlenmeyer flask, add 50mg of doped polydiaminoanthraquinone polymer (the number-average particle diameter of the laser particle size test is 1.3-2.5μm and 0.09615mol / L silver ion solution 40mL, put the Erlenmeyer flask Put it into an ultrasonic vibrator and take it out after ultrasonic vibration treatment for 1 hour, place it in a water bath at 30° C. for stirring and adsorption for 15 hours. Filter through filter paper, analyze the concentration of residual silver ions after adsorption by Volhard method titration, and its adsorption capacity is 243.0 mg / g. Other conditions are the same, and the corresponding de-doped state polymer is used instead, and the adsorption capacity is 322.5 mg / g. It can be seen that the performance of the de-doped state is better than that of the doped state.

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Abstract

The invention discloses a method to reclaim silver from solution with silver ion, which comprises the following steps: adopting static absorption method; using micrometer or nanometer particle of poly diamino corbit as sorbent; adding poly diamino corbit into silver ion solution with initial concentration at 1-100mmol/L; stirring; absorbing 30min-24h; filtering. This invention possesses cheap cost, convenient operation and high adsorption efficiency, which can be used to image fusing waste liquid, plating waste liquid, chemical analysis waste liquid and test waste liquid.

Description

technical field [0001] The invention relates to a method for recovering silver from a solution containing silver ions by using polydiaminoanthraquinone as a silver ion adsorbent. Background technique [0002] There are many recovery methods for precious metal ions—silver ions, the most important of which is adsorption. Among the adsorption methods, the adsorption performance of synthetic adsorbent is the most superior. Synthetic adsorbents for silver ion adsorption mainly include activated carbon adsorbents, activated carbon fiber adsorbents, chelating fibers and resins, and aromatic amino polymer adsorbents. In recent years, many researchers have done a lot of work in exploring efficient silver ion synthetic adsorbents. Among them, Luo Yongyi and others used activated carbon to adsorb and enrich ultra-trace silver in natural water, and the adsorption rate was as high as 95.8%. Jin Yuan. Study on the adsorption of trace silver by activated carbon. Forestry Chemistry and I...

Claims

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Application Information

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IPC IPC(8): C22B3/24C22B11/00
CPCY02P10/20
Inventor 黄美荣李虎李新贵
Owner TONGJI UNIV
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