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Method for separating palladium from acidic aqueous solution by utilizing adsorbent

A technology of acidic aqueous solution and nitric acid aqueous solution, which is applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as lack of separation means, and achieve the effects of high separation efficiency, high selectivity and simple operation.

Active Publication Date: 2019-01-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the metallurgical industry and the treatment of high-level waste liquid produced by the reprocessing of spent fuel, it is necessary to separate the metal element palladium. In the prior art, there is a lack of simple and easy separation means

Method used

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  • Method for separating palladium from acidic aqueous solution by utilizing adsorbent
  • Method for separating palladium from acidic aqueous solution by utilizing adsorbent
  • Method for separating palladium from acidic aqueous solution by utilizing adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Dissolve 0.5g of the compound 9,11-benzo-1,4,8-trithiocyclo12alkane shown in structural formula I in 45.0mL of dichloromethane, mix well to obtain a solution; add 4.5g of SiO 2 -P Stir evenly, and use a rotary evaporator to evaporate dichloromethane under reduced pressure to volatilize the methylene chloride until the material is in a near-dry state, and then vacuum-dry the near-dry material at 55°C for 24 hours to obtain an adsorbent.

Embodiment 2

[0027] Dissolve 0.5g of the compound 9,11-benzo-1,4,8-trithiocyclo12alkane shown in structural formula I in 40.0mL of dichloromethane, mix well to obtain a solution; add 4.0g of SiO 2 -P Stir evenly, and use a rotary evaporator to evaporate dichloromethane under reduced pressure to volatilize the material to a near-dry state, and then vacuum-dry the near-dry material at 50°C for 24 hours to obtain an adsorbent.

Embodiment 3

[0029] Dissolve 0.5g of the compound 9,11-benzo-1,4,8-trithiocyclo12alkane shown in structural formula I in 50.0mL of dichloromethane, mix well to obtain a solution; add 5.5g of SiO 2 -P Stir evenly, and use a rotary evaporator to evaporate dichloromethane under reduced pressure to volatilize the methylene chloride until the material is in a near-dry state, and then vacuum-dry the near-dry material at 60°C for 24 hours to obtain an adsorbent.

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PUM

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Abstract

The invention discloses a method for separating palladium from an acidic aqueous solution by utilizing an adsorbent. The method comprises the step of mixing the adsorbent with an aqueous nitric acid solution, thereby absorbing and separating the palladium in ionic form from the aqueous nitric acid solution by the adsorbent. The adsorbent is prepared by loading a compound shown as structural formula I onto a carrier; the aqueous nitric acid solution contains Pd (II) and other metal ions; other metal ions are at least one of Na (I), Li (I), K (I), Rb (I), Cs (I), Mg (II), Ca (II), Sr (II), Ba (II) and Ru (III). The method for separating palladium from the acidic aqueous solution by utilizing the adsorbent provided by the invention is capable of absorbing and separating palladium from the aqueous nitric acid solution and has high selectivity, simple operation and high separating efficiency.

Description

technical field [0001] The invention relates to the technical field of element separation, in particular to a method for separating palladium from an acidic aqueous solution by using an adsorbent. Background technique [0002] The precious metal palladium has a special structure and has a special adsorption capacity for hydrogen and oxygen, so it occupies an irreplaceable position in the field of industrial catalysis. [0003] In addition to its excellent catalytic activity, palladium can maintain chemical inertness in a wide temperature range and has the characteristics of high melting point, friction resistance, corrosion resistance, strong ductility, and strong thermoelectric stability. It is widely used in national industries. each field. [0004] In the metallurgical industry and the treatment of high-level waste liquid produced by the reprocessing of spent fuel, it is necessary to separate the metal element palladium. In the prior art, there is a lack of simple and ea...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/26B01J20/30C02F101/20C02F103/16
CPCB01J20/103B01J20/22B01J20/26C02F1/288C02F2101/20C02F2103/16
Inventor 张安运熊磊杨尚儒
Owner ZHEJIANG UNIV