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Catalyst for catalyzing hydrogenation reduction of nitrophenol and application thereof

A technology of nitrophenol and p-nitrophenol, applied in the field of nano-catalysts, can solve the problems of reduced catalytic efficiency, poisoning and deactivation, and high cost, and achieves the effects of high catalytic activity, fast reaction speed, and easy operation.

Active Publication Date: 2017-05-10
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although noble metal nanocatalysts have high catalytic activity, their cost is high, and they are prone to agglomeration or poisoning inactivation during use, which reduces their catalytic efficiency.

Method used

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  • Catalyst for catalyzing hydrogenation reduction of nitrophenol and application thereof
  • Catalyst for catalyzing hydrogenation reduction of nitrophenol and application thereof
  • Catalyst for catalyzing hydrogenation reduction of nitrophenol and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of bismuth oxychloride (BiOCl) ultrathin nanosheets:

[0033] a. Dissolve 0.6mmol mannitol and 0.4g polyvinylpyrrolidone (PVP, K-30) in 60mL distilled water, stir to dissolve;

[0034] b. Dissolve 2.0 mmol of bismuth nitrate pentahydrate in 10 mL of ethylene glycol, and ultrasonically form a solution at room temperature;

[0035] c. Dissolve 2.0mmol sodium chloride in 10mL ethylene glycol, and ultrasonically form a solution at room temperature;

[0036] d. adding the solutions prepared in step b and step c to the solution in step a successively, and stirring evenly to obtain a reaction solution;

[0037] e. Move the reaction solution in step d into a hydrothermal reaction kettle with a volume of 50mL, then seal the hydrothermal reaction kettle, keep it at 160°C for 8h, cool to room temperature after the reaction, and pass the precipitate generated in the reaction kettle through After centrifugal separation, washing with distilled water and drying, the BiOC...

Embodiment 2

[0041] Catalytic reduction of o-nitrophenol to o-aminophenol

[0042] a. Weigh 10 mg of bismuth oxychloride ultrathin nanosheets and ultrasonically disperse them in 10 mL of distilled water;

[0043] b. Pipette 0.1 mL of the suspension prepared in step a, and add it to 2.7 mL of o-nitrophenol aqueous solution (concentration: 0.1 mM);

[0044] c. Weigh 0.1134g of sodium borohydride and dissolve it in 10ml of ice water, pipette 0.4ml into the solution obtained in step b, mix quickly and evenly, and the reaction begins;

[0045] d. Use an ultraviolet-visible spectrophotometer to detect the absorption spectrum of the reaction solution in step c every 1 min, and monitor the reaction progress in real time until the peak around 400 nm no longer changes significantly.

[0046] From Figure 6 As can be seen in a, the characteristic absorption peak of o-nitrophenol itself is at 351nm, but after adding sodium borohydride, because o-nitrophenolate ions are formed under alkaline conditions...

Embodiment 3

[0048] Catalytic reduction of m-nitrophenol to m-aminophenol

[0049] a. Weigh 10 mg of bismuth oxychloride ultrathin nanosheets and ultrasonically disperse them in 10 mL of distilled water;

[0050] b. Pipette 0.1 mL of the suspension prepared in step a, and add it to 2.7 mL of m-nitrophenol aqueous solution (concentration is 0.1 mM);

[0051] c. Weigh 0.1134g of sodium borohydride and dissolve it in 10ml of ice water, pipette 0.4ml into the solution obtained in step b, mix quickly and evenly, and the reaction begins;

[0052] d. Use a UV-Vis spectrophotometer to detect the absorption spectrum of the reaction solution in step c, so that the reaction progress can be detected in real time.

[0053] Figure 7 a is the ultraviolet-visible absorption spectrogram of reaction solution in the m-nitrophenol process of embodiment 3 catalytic reduction generation m-nitrophenol, the characteristic absorption peak of m-nitrophenol itself is at 350nm place, but after adding sodium borohy...

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Abstract

The invention relates to the technical field of nanocatalysts, in particular to a catalyst for catalyzing hydrogenation reduction of nitrophenol and application thereof. The catalyst is an ultrathin bismuth oxychloride nanosheet with the diameter of 60-80nm, has very high catalytic activity in catalytic reduction of o-nitrophenol, m-nitrophenol and p-nitrophenol into corresponding aminophenol, and can replace a noble metal catalyst and be applied to a reaction of catalytically reducing the nitrophenol to prepare the aminophenol, so that the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of nano catalysts, in particular to a catalyst for catalyzing the hydrogenation reduction of nitrophenol and its application. Background technique [0002] Aminophenol is an important organic synthesis intermediate, which is generally used in the preparation of various analgesics such as acetaminophen, vitamin B, antipyretic ice, and phenacetin in the pharmaceutical industry; it is generally used in the preparation of wood products in the dye industry Colorants and dyes for hair. In addition, it can also be used in photographic developer, rubber anti-aging agent and inhibitor of urea addition reaction, etc. It is a widely used chemical raw material. Nitrophenol is a class of highly toxic, refractory, and most difficult to treat compounds. Therefore, the purification of aromatic hydrocarbon wastewater is a technical problem in my country and the world. There is a need to develop economical and green catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C07C213/02C07C215/76
CPCB01J27/06C07C213/02C07C215/76
Inventor 聂士斌李本侠邵良志邵先坤张宝山
Owner ANHUI UNIV OF SCI & TECH
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