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Resin-based zero-valent copper catalyst, preparation method and application of resin-based zero-valent copper catalyst in catalytic reduction of para-nitrophenol

A zero-valent copper and resin-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc. Catalysts are expensive and other issues, to achieve the effects of recycling, saving economic costs, and stable structure

Inactive Publication Date: 2018-11-23
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because noble metal catalysts are easy to agglomerate and lose, their catalytic activity is greatly reduced; at the same time, from an economic point of view, noble metal catalysts are expensive and scarce resources, which affect industrial applications

Method used

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  • Resin-based zero-valent copper catalyst, preparation method and application of resin-based zero-valent copper catalyst in catalytic reduction of para-nitrophenol
  • Resin-based zero-valent copper catalyst, preparation method and application of resin-based zero-valent copper catalyst in catalytic reduction of para-nitrophenol
  • Resin-based zero-valent copper catalyst, preparation method and application of resin-based zero-valent copper catalyst in catalytic reduction of para-nitrophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 100mg of D001 resin into 100mL of 200mg / L cupric chloride solution, shake until adsorption equilibrium, and obtain D001 resin loaded with 13% copper ions. Then add 500mg of sodium borohydride to reduce divalent copper to zero-valent copper, resin-based zero-valent copper catalyst.

[0042] The particle size of D001 cation exchange resin loaded zero-valent copper catalyst obtained in Example 1 is concentrated in 50 μm-1mm, and its scanning electron microscope picture is as follows: figure 1 As shown, the figure shows the surface morphology of the catalyst at magnifications of 1000 μm, 500 μm, and 5 μm.

[0043] Add 100mg of the resin-based zero-valent copper catalyst to 100mL 20mg / L p-nitrophenol solution, then add 0.1g sodium borohydride, and catalyze the conversion of p-nitrophenol into p-aminophenol at room temperature. After 2 hours, the catalytic conversion rate can reach up to 90%.

Embodiment 2

[0045]Add 100 mg of macroporous aminophosphoric acid chelating resin to 100 mL of 10 mg / L copper chloride solution, shake to adsorption equilibrium, and obtain macroporous aminophosphoric acid chelating resin loaded with 1% copper ions. Then add 500 mg of sodium borohydride to reduce divalent copper to zero-valent copper to obtain a resin-based zero-valent copper catalyst.

[0046] The obtained resin-based zero-valent copper catalyst was added to 100 mL of 20 mg / L p-nitrophenol solution, and then 0.1 g of sodium borohydride was added to catalyze the conversion of p-nitrophenol into p-aminophenol at room temperature. After 2 hours, the catalytic conversion rate could reach up to 95%.

Embodiment 3

[0048] Add 100mg of polyvinylpyridine resin to 100mL of 80mg / L copper chloride solution, shake to adsorption equilibrium, and obtain polyvinylpyridine nitrogen-containing resin loaded with 7% copper ions. Then add 500 mg of sodium borohydride to reduce divalent copper to zero-valent copper to obtain a resin-based zero-valent copper catalyst.

[0049] The obtained resin-based zero-valent copper catalyst was added to 100 mL of 20 mg / L p-nitrophenol solution, and then 0.1 g of sodium borohydride was added to catalyze the conversion of p-nitrophenol into p-aminophenol at room temperature. After 2 hours, the catalytic conversion rate could reach up to 80%.

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Abstract

The invention discloses a resin-based zero-valent copper catalyst, a preparation method and application of the resin-based zero-valent copper catalyst in catalytic reduction of para-nitrophenol. The resin-based zero-valent copper catalyst is prepared by reducing copper ions into zero-valent copper after loading the copper ions on a resin polymer carrier, and the copper content is 0.5 to 50 mass percent. The resin-based zero-valent copper catalyst disclosed by the invention has an efficient catalytic reduction effect on the para-nitrophenol, can be repeatedly used and is high in catalytic efficiency; after the resin-based zero-valent copper catalyst is oxidized into resin-based copper oxide, and the catalytic activity can be enhanced; the resin-based zero-valent copper catalyst is convenient to prepare, a preparation process is pollution-free, the structure is simple and stable, and the resin-based zero-valent copper catalyst is a green catalyst and can be widely applied to catalytically reduce the para-nitrophenol into para-aminophenol.

Description

technical field [0001] The invention relates to a resin-based zero-valent copper catalyst, a preparation method and its application in catalytic reduction of p-nitrophenol, and belongs to the fields of preparation and application of catalyst materials and wastewater treatment. Background technique [0002] p-Nitrophenol is a raw material widely used in agricultural chemistry, pesticide, paper making, printing and dyeing, rubber and other fields. The massive production and use of p-nitrophenol has led to the gradual release of p-nitrophenol and its derivatives into the environment, posing a great threat to the ecological environment. The U.S. Environmental Protection Agency has listed it as a priority pollutant. The European Union directly defines p-nitrophenol as an aquatic biological poison. The China Environmental Monitoring Center has added p-nitrophenol to the blacklist of priority organic pollutants. If human skin and eyes are stimulated by p-nitrophenol, it will have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C02F1/70C02F101/38
CPCB01J31/28C02F1/705C02F2101/38
Inventor 李强夏东升苏业旺李东亚袁向娟徐海明潘飞
Owner WUHAN TEXTILE UNIV
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