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A method for separating palladium from acidic aqueous solution

The technology of an acidic aqueous solution and an aqueous nitric acid solution is applied in the field of separation of palladium, which can solve the problems such as lack of separation means, and achieve the effects of high separation efficiency, simple operation and high selectivity.

Active Publication Date: 2019-10-25
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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  • A method for separating palladium from acidic aqueous solution
  • A method for separating palladium from acidic aqueous solution
  • A method for separating palladium from acidic aqueous solution

Examples

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Effect test

Embodiment 1

[0026] Dissolve 0.5g of the compound bis(2,4,4-trimethylpentyl)dithiophosphinic acid shown in structural formula I in 45.0mL of dichloromethane, mix well to obtain a solution; add 4.5 gSiO 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

[0028] Dissolve 0.5g of the compound bis(2,4,4-trimethylpentyl)dithiophosphinic acid shown in structural formula I in 40.0mL of dichloromethane, mix well to obtain a solution; add 4.0 gSiO 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

[0030] Dissolve 0.5g of the compound bis(2,4,4-trimethylpentyl)dithiophosphinic acid shown in structural formula I in 50.0mL of dichloromethane, mix well to obtain a solution; add 5.5 gSiO 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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Abstract

The invention discloses a method of separating palladium from an acidic aqueous solution. The method comprises the following step: mixing an adsorbent with a nitric acid aqueous solution, wherein palladium in form of ions in the nitric acid aqueous solution is adsorbed and separated by the adsorbent and the adsorbent is prepared by loading a compound as shown in a structural formula I to a vector;and the nitric acid aqueous solution contains Pd(II) and other metal ions, and the other metal ions are at least one of Na(I), Li(I), K(I), Rb(I), Cs(I), Mg(I), Ca(II), Sr(II), Ba(II) and Ru(III). The method of separating palladium from the acidic aqueous solution can adsorb and separate palladium from the acidic aqueous solution and is high in selectivity, simple to operate and high in separation 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. 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 easy separation means. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/00C22B3/22
CPCC22B3/22C22B11/04Y02P10/20
Inventor 张安运熊磊杨尚儒
Owner ZHEJIANG UNIV