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Method for adsorbing and separating palladium using supramolecular adsorbent

An adsorption separation and adsorbent technology, applied in the field of element separation, can solve the problems of difficult separation, low content, and efficient separation of palladium

Active Publication Date: 2021-06-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many types of elements in the high-level waste liquid, but the content is low; some elements are difficult to effectively separate due to the close chemical properties, and the high-level waste liquid contains a high concentration of nitric acid, which requires the adsorbent to be used in high-concentration nitric acid. Has good stability
Therefore, the prior art is facing the technical problem of efficiently separating palladium from spent palladium catalysts and high-level waste liquids

Method used

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  • Method for adsorbing and separating palladium using supramolecular adsorbent
  • Method for adsorbing and separating palladium using supramolecular adsorbent
  • Method for adsorbing and separating palladium using supramolecular adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 1g of the supramolecular compound BiPC5 shown in structural formula (I) in 100.0mL of dichloromethane, fully dissolve, add 10.0g of metal organic framework material UiO-66 shown in structural formula (II) to the resulting solution, and stir to make UiO -66 was mixed with BiPC5 evenly, most of the dichloromethane was volatilized by rotary evaporation under reduced pressure until the material was in a near-dry state, and then the near-dry material was vacuum-dried at 45°C for 24 hours to obtain the adsorbent UiO-66@BiPC5.

Embodiment 2

[0025] Dissolve the supramolecular compound BiPC5 shown in 0.5g structural formula (I) in 75.0mL dichloromethane, fully dissolve, add the metal-organic framework material UiO-66 shown in 2.5g structural formula (II) in the gained solution, stir to make Mix UiO-66 and BiPC5 evenly, evaporate most of the dichloromethane to a near-dry state by rotary evaporation under reduced pressure, and then dry the near-dry state at 50°C for 24 hours to obtain the adsorbent UiO-66@BiPC5 .

Embodiment 3

[0027] Dissolve the supramolecular compound BiPC5 shown in 0.7g structural formula (I) in 80.0mL dichloromethane, fully dissolve, add the metal-organic framework material UiO-66 shown in 5.0g structural formula (II) in the obtained solution, stir to make Mix UiO-66 and BiPC5 evenly, evaporate most of the dichloromethane by vacuum rotary evaporation until the material is in a near-dry state, and then dry the material in a near-dry state at 55°C for 24 hours to obtain the adsorbent UiO-66@BiPC5 .

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Abstract

The invention discloses a method for adsorbing and separating palladium using a supramolecular adsorbent. The method comprises the following steps that a to-be-separated nitric acid solution containing the palladium is mixed with the adsorbent, and the adsorbent adsorbs and separates a palladium element, wherein the adsorbent is prepared by loading a supramolecular compound BiPC5 as shown in a structural formula (I) on a metal organic framework material UiO-66 as shown in a structural formula (II). The adsorbent adopted by the method has a strong adsorption effect on the palladium element under a specific nitric acid concentration, and has no adsorption capacity on other elements so that the enrichment and separation of the palladium element can be realized; and according to the method for adsorbing and separating the palladium using the supramolecular adsorbent, the adsorbent is especially suitable for separating the palladium from high-level liquid waste or a palladium-containing waste catalyst.

Description

technical field [0001] The invention relates to the technical field of element separation, in particular to a method for adsorbing and separating palladium by using a supramolecular adsorbent. Background technique [0002] Palladium is a group VIII platinum group element in the fifth cycle. Palladium reserves on the earth are scarce, and it is difficult to mine and smelt. It is a rare and precious metal. Palladium is an indispensable key material in scientific and technological fields such as chemical industry, aerospace, aviation, navigation, weapons and nuclear energy, as well as automobile manufacturing. For example, in the purification of automobile exhaust gas, palladium catalyst is currently a hot research and application because of its good catalytic activity. In the field of chemistry and chemical engineering, palladium catalysts with metal palladium as the main active component are often used as catalysts for hydrogenation and dehydrogenation reactions. They have t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/24C22B7/00
CPCC22B11/048C22B3/24C22B7/006C22B7/009Y02P10/20
Inventor 张安运王政苏佳天陈蓉蓉
Owner ZHEJIANG UNIV