A kind of processing method of high concentration p-nitrophenol

A technology of p-nitrophenol and treatment method, which is applied in the field of catalysis to achieve the effect of improving stability, increasing surface area and continuous treatment

Active Publication Date: 2021-12-28
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite numerous studies by researchers, continuous complete conversion of high concentrations of p-nitrophenol (e.g. > 1000 mg / L) remains a challenge

Method used

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  • A kind of processing method of high concentration p-nitrophenol
  • A kind of processing method of high concentration p-nitrophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 flow-through reactor (Pd / dendritic TiO 2 Nanorod-modified Al 2 o 3 ceramic membrane) for p-nitrophenol conversion

[0030] (1) Dendritic TiO 2 Nanorod-modified Al 2 o 3 Preparation of ceramic membrane

[0031] The first step of hydrothermal: Measure 20 mL of deionized water and 20 mL of hydrochloric acid, mix and stir for 5 minutes, add 0.955 mL of tetrabutyl titanate (0.07 mol / L) and stir for 10 minutes to prepare a hydrothermal solution; ceramic membrane (diameter: 3.2 cm, material: Al 2 o 3 , membrane pore size: 3 μm) was placed vertically in a 50 mL hydrothermal kettle, poured into the hydrothermal solution, and carried out hydrothermal reaction at 150 °C for 5 h, and a layer of TiO was grown on the surface of the ceramic membrane. 2 Seed.

[0032] The second step of hydrothermal: Mix 20 mL of hydrochloric acid, 20 mL of deionized water, and 3 mL of NaCl solution with a concentration of 6.16 mol / L and stir for 5 min, add 0.955 mL of tetrabutyl tit...

Embodiment 2

[0040] Example 2 flow-through reactor (Pd / dendritic TiO 2 Nanorod-modified ZrO 2 ceramic membrane) for p-nitrophenol conversion

[0041] (1) Dendritic TiO 2 Nanorod-modified ZrO 2 Preparation of ceramic membrane

[0042] The first step of hydrothermal: Measure 20 mL of deionized water and 20 mL of hydrochloric acid, mix and stir for 5 minutes, add 1.228 mL of tetrabutyl titanate (0.09 mol / L) and stir for 10 minutes to prepare a hydrothermal solution; ceramic membrane (diameter: 3.2 cm, material: ZrO 2 , membrane pore size: 200 nm) was placed vertically in a 50 mL hydrothermal kettle, poured into the hydrothermal solution, and carried out hydrothermal reaction at 180 ℃ for 5 h, and a layer of TiO was grown on the surface of the ceramic membrane 2 Seed.

[0043] The second step of hydrothermal: Mix 20 mL of hydrochloric acid, 20 mL of deionized water, and 3 mL of NaCl solution with a concentration of 4 mol / L and stir for 5 min, add 1.228 mL of tetrabutyl titanate (0.09 mol...

Embodiment 3

[0050] Example 3 flow-through reactor (Pd / dendritic TiO 2 Nanorod-modified TiO 2 ceramic membrane) for p-nitrophenol conversion

[0051] (1) Dendritic TiO 2 Nanorod-modified TiO 2 Preparation of ceramic membrane

[0052] The first step of hydrothermal: Measure 20 mL of deionized water and 20 mL of hydrochloric acid, mix and stir for 5 minutes, add 0.409 mL of tetrabutyl titanate (0.03 mol / L) and stir for 10 minutes to prepare a hydrothermal solution; ceramic membrane (diameter: 3.2 cm, material: TiO 2 , membrane pore size: 10 μm) was placed vertically in a 50 mL hydrothermal kettle, poured into the hydrothermal solution, and carried out hydrothermal reaction at 90 °C for 5 h, and a layer of TiO was grown on the surface of the ceramic membrane. 2 Seed.

[0053] The second step of hydrothermal: Mix 20 mL of hydrochloric acid, 20 mL of deionized water, and 3 mL of NaCl solution with a concentration of 2 mol / L and stir for 5 min, add 0.409 mL of tetrabutyl titanate (0.03 mol...

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Abstract

The invention relates to a method for treating high-concentration p-nitrophenol, which belongs to the technical field of catalysis. The method realizes the complete conversion of high-concentration p-nitrophenol through a flow-through reactor, and the key of the method is to prepare a catalytic membrane with excellent performance and construct a flow-through reactor. First, dendritic TiO is grown on the surface of the ceramic membrane and in the pores. 2 Nanorods, modified by silane coupling agent, loaded with Pd particles to prepare catalytic membrane. A flow-through reactor is constructed by utilizing the porous characteristics of the membrane, and the reaction liquid continuously flows through the pores of the membrane to fully contact and react with the active components, thereby realizing the continuous and complete conversion of high-concentration p-nitrophenol. The advantage of this invention is that dendritic TiO 2 Nanorods can increase the specific surface area of ​​the film, thereby loading more Pd particles and improving catalytic activity; TiO 2 The branch can play the role of fixing the Pd particles; the Pd particles are supported on the surface of the membrane and in the pores, which avoids the problem of difficult subsequent separation of the catalyst and the product.

Description

technical field [0001] The invention relates to catalyst preparation and application, belongs to the technical field of catalysis, and in particular relates to a treatment method for high-concentration p-nitrophenol. Background technique [0002] p-Nitrophenol is a precursor or intermediate in the industrial production process of analgesics, drugs, pesticides, dyes and other chemicals, and is an environmental pollutant widely present in water. p-Nitrophenol has carcinogenic toxicity and will bring great harm to human health. Even at low concentrations, short-term inhalation or ingestion can cause symptoms such as headache, drowsiness, and nausea. Therefore, the elimination of p-nitrophenol in industrial wastewater is an environmental protection issue worthy of attention. [0003] Chemical methods are often used to convert p-nitrophenol to high-value products or to achieve complete degradation. Catalytic reduction of p-nitrophenol to p-aminophenol is a green route to conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58B01J31/38C02F101/34C02F101/38
CPCC02F1/58B01J31/38C02F2101/38C02F2101/345
Inventor 陈日志缪建峰杜艳姜红刘业飞邢卫红
Owner NANJING TECH UNIV
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