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Catalyst for efficient catalytic reduction of nitrophenol as well as preparation method and application of catalyst

A technology of nitrophenol and p-nitrophenol, which is applied in the field of catalytic reduction of nitrophenol catalysts and its preparation, can solve the problems of easy agglomeration and shedding of active components, high cost, harsh preparation process conditions, etc., and achieve excellent magnetic properties, The effect of low cost and improved load stability

Inactive Publication Date: 2019-01-04
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has high catalytic activity for the catalytic hydrogenation of p-nitrophenol. Although the separation is relatively easy, the preparation process conditions are harsh and the cost is high. At the same time, the active components are simply loaded on the carrier and are easy to agglomerate and fall off.

Method used

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  • Catalyst for efficient catalytic reduction of nitrophenol as well as preparation method and application of catalyst
  • Catalyst for efficient catalytic reduction of nitrophenol as well as preparation method and application of catalyst
  • Catalyst for efficient catalytic reduction of nitrophenol as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of BiFeO by the combination of co-precipitation method and hydrothermal method 3 Carrier: Weigh 42 mmol of bismuth nitrate pentahydrate and put it into a 200ml beaker, then add 40mL of deionized water, drop into 2ml of 70% dilute nitric acid solution, add 40mmol of Fe(NO 3 ) 3 • 5H 2 O, mechanical stirring for 30 minutes; 80ml of KOH with a concentration of 5mol / L was slowly added dropwise at a rate of 1ml / min, and the co-precipitation process was kept in a stirring state. The resulting precipitate was filtered and washed several times with deionized water and alcohol, and dried in an oven at 60 °C for 24 h. Grind the dried xerogel into a fine powder and put it into the prepared 5mol / L 60mL NaOH solution, add 10g / L 10mL PVP solution, ultrasonicate for 1 hour, then stir for 10 hours, and finally move to a 100ml stainless steel autoclave In 200℃ for 12h, the hydrothermal reaction was carried out to obtain BiFeO 3 particles.

[0035] 2. Using wet impreg...

Embodiment 2

[0039] 1. Preparation of BiFeO by the combination of co-precipitation method and hydrothermal method 3 Carrier: Weigh 42.4mmol of bismuth nitrate pentahydrate and put it into a 200ml beaker, then add 40mL of deionized water, drop into 2ml of 60% dilute nitric acid solution, add 40mmol of Fe(NO 3 ) 3 • 5H 2 O, mechanical stirring for 30 minutes; 80ml of KOH with a concentration of 6mol / L was slowly added dropwise at a rate of 1ml / min, and the co-precipitation process was kept in a stirring state. The resulting precipitate was filtered and washed several times with deionized water and alcohol, and dried in an oven at 70 °C for 20 h. Grind the dried xerogel into a fine powder and put it into the prepared 6mol / L 60mL NaOH solution, add 12g / L 10mL PVP solution, sonicate for 1 hour, then stir for 10 hours, and finally move to a 100ml stainless steel autoclave In 220℃ for 8h, the hydrothermal reaction was carried out to obtain BiFeO 3 particles.

[0040] 2. Using wet impregnatio...

Embodiment 3

[0044] 1. Preparation of BiFeO by the combination of co-precipitation method and hydrothermal method 3 Carrier: Weigh 42.8mmol of bismuth nitrate pentahydrate and put it into a 200ml beaker, then add 40mL of deionized water, drop in 2ml of 50% dilute nitric acid solution, add 40mmol of Fe(NO 3 ) 3 • 5H 2 O, mechanically stirred for 30 minutes; 70ml of KOH with a concentration of 7mol / L was slowly added dropwise at a rate of 1ml / min, and the co-precipitation process was kept in a stirring state. The resulting precipitate was filtered and washed several times with deionized water and alcohol, and dried in an oven at 70 °C for 24 h. Grind the dried xerogel into a fine powder, put it into the prepared 7mol / L 50mL NaOH solution, add 13g / L 10mL PVP solution, ultrasonicate for 1 hour, then stir for 10 hours, and finally move to a 100ml stainless steel autoclave In 180℃ for 12h, the hydrothermal reaction was carried out to obtain BiFeO 3 particles.

[0045] 2. Using wet impregnat...

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Abstract

The invention discloses a catalyst for high efficiency catalytic reduction of nitrophenol as well as a preparation method and the application of the catalyst, and relates to the technical field of catalytic degradation of the nitrophenol. The catalyst takes a multiferroic material, namely bismuth ferrite nano-material as a carrier and loads a certain amount of transition metal oxide on the surfaceof the carrier by using a wet impregnation method, wherein the content of transition metal accounts for 0.4 to 1.6 percent of total mass of the catalyst. The catalyst prepared by the preparation method disclosed by the invention has the advantages of excellent magnetism and excessively-high catalytic activity; o-nitrophenol, m-nitrophenol and p-nitrophenol can be catalyzed and reduced into the corresponding amino-phenols under the conditions of shorter time and smaller use amount of the catalyst at a room temperature; moreover, the catalyst adopts a non-precious metal material, so that the production cost is low.

Description

technical field [0001] The invention relates to the technical field of catalytic reduction of nitrophenol in industrial wastewater, in particular to a highly efficient and easily recyclable catalyst for catalytic reduction of nitrophenol, its preparation method and application. Background technique [0002] Nitrophenol generally acts on the intermediates of fine chemicals such as pesticides, medicines, and dyes. Soil, human body and aquatic organisms can cause serious harm, so the treatment of wastewater containing nitroaromatic compounds has always been a worldwide technical problem. The reduction of nitrophenol widely used in industrial production mainly focuses on: nitrophenol electrolytic reduction method and nitrophenol catalytic reduction method. The nitrophenol electrolytic reduction method has high technical requirements for the design of the reactor and the control of process conditions, and it also has high energy consumption and difficult regeneration of electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J35/10C07C213/02C07C215/76
CPCC07C213/02B01J23/002B01J23/8437B01J2523/00B01J35/33B01J35/61C07C215/76B01J2523/54B01J2523/842B01J2523/845
Inventor 权善玉史学峰张旭东史桂梅
Owner SHENYANG POLYTECHNIC UNIV
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