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Preparation method of catalyst for treatment of biorefractory industrial organic wastewater

A technology for industrial wastewater and catalysts, which is applied in catalyst activation/preparation, physical/chemical process catalysts, catalyst carriers, etc., and can solve the problems of difficult separation of solid-liquid two-phase

Inactive Publication Date: 2018-01-05
云南省贵金属新材料控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention selects an integral honeycomb carrier, which not only facilitates the continuous treatment of industrial wastewater, but also solves the problem of difficult solid-liquid two-phase separation of catalyst and treated water

Method used

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  • Preparation method of catalyst for treatment of biorefractory industrial organic wastewater
  • Preparation method of catalyst for treatment of biorefractory industrial organic wastewater
  • Preparation method of catalyst for treatment of biorefractory industrial organic wastewater

Examples

Experimental program
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Effect test

example 1

[0022] Example 1: Weighing 10g honeycomb carrier placed in 5% NaOH solution and diluted 5 times HNO 3 Purify and dry in the solution; accurately weigh 0.9295g of 3% cerium nitrate and 0.9352g of 3% lanthanum nitrate and dissolve it in 100mL of water, stir and dissolve and continue to stir for 24 hours, take it out and wash it with deionized water several times, and dry it at 80°C , baked for 2 hours under a nitrogen atmosphere in the temperature range of 400°C-600°C; to γ-Al 2 o 3 Add the same quality of water and stir evenly, weigh the precious metals Ru, Pt and Pd in ​​a molar ratio of 3:1:1, and the mass is 0.0157g, 0.0038g, 0.0068g to 3g γ-Al 2 o 3 In the aqueous solution, add ferric nitrate, manganese nitrate and ammonium metavanadate at the same time according to the molar ratio of Fe:Mn:V about 2:2:1. 3 and NH 3 ·H 2 O adjust the pH within the range of 4-7, stir for 2 hours, dry and grind to make a coating material, make the above coating material into a slurry, co...

example 2

[0023] Example two: weigh 100g of honeycomb carrier and place it in 5% NaOH solution and dilute 5 times of HNO 3 Purify and dry in the solution; accurately weigh 9.29g of 3% cerium nitrate and 9.35g of 3% lanthanum nitrate and dissolve it in 1000mL of water, stir to dissolve and continue to stir for 24 hours, take it out and wash it with deionized water several times, and dry it at 80°C , baked for 2 hours under a nitrogen atmosphere in the temperature range of 400°C-600°C; to γ-Al 2 o 3 Add the same quality of water and stir evenly, weigh the precious metals Ru, Pt and Pd in ​​a molar ratio of 3:1:1, and the mass is 0.157g, 0.038g, 0.068g to 30g γ-Al 2 o 3 In the aqueous solution, add iron nitrate, manganese nitrate and ammonium metavanadate at the same time according to the molar ratio of Fe:Mn:V about 2:2:1. 3 and NH 3 ·H 2 O adjust the pH within the range of 4-7, stir for 2 hours, dry and grind to make a coating material, make the above coating material into a slurry,...

example 3

[0024] Example three: weigh 1000g of honeycomb carrier and place it in 5% NaOH solution and dilute 5 times of HNO 3 Purify and dry in the solution; accurately weigh 92.9g of 3% cerium nitrate and 93.5g of 3% lanthanum nitrate and dissolve in 10000mL of water, stir and dissolve and continue to stir for 24 hours, take it out and wash it with deionized water several times, at 80°C After drying, it is calcined for 2 hours under a nitrogen atmosphere in the temperature range of 400°C-600°C; to γ-Al 2 o 3Add the same quality of water and stir evenly, and weigh the precious metals Ru, Pt and Pd in ​​the ratio of 3:1:1 by molar ratio. The mass is 1.57g, 0.38g, 0.68g to 300gγ-Al 2 o 3 In the aqueous solution, add iron nitrate, manganese nitrate and ammonium metavanadate at the same time according to the molar ratio of Fe:Mn:V about 2:2:1. 3 and NH 3 ·H 2 O adjust the pH within the range of 4-7, stir for 2 hours, dry and grind to make a coating material, make the above coating mate...

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Abstract

The invention discloses a preparation method of a catalyst for treatment of biorefractory industrial organic wastewater. Treatment can be achieved at normal temperature and normal pressure by an air catalytic oxidation method. The catalyst is for a catalytic oxidation method for treatment of low-concentration (COD being less than or equal to 1000 mg / L) biorefractory industrial organic wastewater;and defects of a wet catalytic oxidation technology, such as high energy consumption, poor safety and short life of a catalyst in industrial wastewater treatment are mainly solved. A monolithic activecarbon carrier is modified by adding a rare earth compound, precious metal elements (Ru, Pt, Pd) and transition metal elements (Fe, Mn, V) at a certain ratio are loaded in an impregnation mode onto gamma-Al2O3 to prepare a coating material; and the coating material is uniformly applied onto the rare earth modified honeycomb monolithic carrier in a mode of vacuum negative pressure; and through processes such as drying, roasting, activation, etc., a monolithic catalyst with high activity, high stability and long life and for catalytic oxidation technical treatment of wastewater is prepared.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for treating biologically refractory organic industrial wastewater by using an air catalytic oxidation method under normal temperature and pressure. It is especially suitable for water quality that cannot meet the current national first-level A standard discharge standard after being treated by other traditional methods or traditional processes, and has good treatment effects. Background technique [0002] With the country's urbanization process and the accelerated development of industry, the problem of environmental pollution is becoming more and more serious. As a large amount of domestic and industrial sewage flows into rivers, lakes or groundwater, it causes serious pollution to water bodies and affects fishery water and domestic water. The "Water Pollution Prevention and Control Action Plan" was promulgated in February and April 2015, and the country raised the sewage discharge standard,...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J32/00B01J23/89B01J35/04B01J37/02B01J37/08C02F1/74C02F101/30
Inventor 刘锋卢军周皓肖宇涂学炎白屏朱绍武陈家林贺小昆冯峰
Owner 云南省贵金属新材料控股集团有限公司
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