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Catalyst for catalytic oxidation of ozone, method for preparing same and method for using same to treat industrial wastewater

A technology of ozone catalytic oxidation and catalyst, which is applied in the direction of oxidized water/sewage treatment, physical/chemical process catalysts, chemical instruments and methods, etc. question

Active Publication Date: 2021-06-15
邢台旭阳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing problem is that the catalytic effect of the catalyst used for ozone catalytic oxidation is not ideal, which is embodied in the fact that the active components are not easy to load, the active components are easy to agglomerate during the preparation process, the catalyst active sites are relatively small, and the catalytic activity is relatively low, so The low utilization rate of ozone leads to relatively high operating costs, so it is necessary to develop efficient ozone catalytic oxidation catalysts

Method used

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  • Catalyst for catalytic oxidation of ozone, method for preparing same and method for using same to treat industrial wastewater

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Effect test

Embodiment 1

[0022] The preparation process of a doped activated carbon carrier with a nitrogen content of 3 wt% is as follows: add 500 mL of concentrated nitric acid to 500 g of activated carbon, heat at 70 °C for 4 h, filter, wash until neutral, and dry for later use. Take 400g of nitric acid-treated activated carbon, add 1000mL of water, and ultrasonically disperse it, then add an aqueous solution containing 100g of melamine to it, and keep stirring for 2h. The water was removed by heating, and the obtained solid mixture was heated to 400° C. under nitrogen, kept for 4 hours, and cooled to room temperature. According to the elemental analysis method, a nitrogen-doped activated carbon carrier with a mass fraction of nitrogen of 3% was obtained.

Embodiment 2

[0024] The preparation process of the doped activated carbon carrier with a nitrogen content of 5wt% is as follows: add 500mL concentrated nitric acid to 500g activated carbon, heat at 70°C for 4h, filter, wash until neutral, and dry for later use. Take 400g of nitric acid-treated activated carbon, add 1000mL of water, and ultrasonically disperse, then add an aqueous solution containing 150g of melamine, and keep stirring for 2h. The water was removed by heating, and the obtained solid mixture was heated to 400° C. under nitrogen, kept for 4 hours, cooled to room temperature, and detected by elemental analysis to obtain a nitrogen-doped activated carbon carrier with a mass fraction of nitrogen of 5%.

Embodiment 3

[0026] The nitrogen-doped activated carbon with a nitrogen content of 3% prepared in Example 1 was used as a carrier, Fe 2 o 3 , MnO 2 and CuO as active components, Ru 2 o 3 The preparation process of the catalyst as the auxiliary agent is as follows: the respective configuration concentrations are 0.5mol / L Fe(NO 3 ) 3 , Mn(NO 3 ) 4 , Cu(NO 3 ) 2 Aqueous solution, RuCl 3 Aqueous solution, take the prepared 0.5mol / L Fe(NO 3 ) 3 , Mn(NO 3 ) 4 , Cu(NO 3 ) 2 、RuCl 31300mL, 213ml, 373ml, and 175ml of the aqueous solution are mixed evenly, that is, the mixed solution contains 0.65mol, 0.1065mol, 0.1865mol and 0.0875mol of Fe ions, Mn ions, Cu ions and Ru ions respectively; take 274g of activated carbon with a nitrogen content of 3wt% The carrier was dispersed in 100g of water, and then the well-mixed four metal salt solutions were added dropwise to the activated carbon slurry, stirred at 70°C for 1 hour, and then an alkaline solution was added to adjust the pH value ...

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Abstract

The invention discloses a catalyst for ozone catalytic oxidation, which comprises: nitrogen-doped activated carbon as a carrier, selected from Fe oxides, Mo oxides, Cu oxides, Ni oxides and Mn oxides Two or more of the oxides are the main catalyst, and one of the oxides selected from Ru, Pd and Pt is the co-catalyst, wherein relative to all the supports, the doped nitrogen element The mass fraction is 1% to 20%, relative to 100 parts by weight of the carrier, the content of the main catalyst is 10-50 parts by weight, and relative to 100 parts by weight of the carrier, the content of the co-catalyst is 1-10 parts by weight. The catalyst can be used in various chemical sewage treatment fields to reduce refractory organic matter and cyanide in sewage, and is especially suitable for the advanced treatment of coal chemical sewage and coking sewage. In the advanced treatment of coking wastewater, it can make coking wastewater COD Cr Reduced from 150mg / L to below 30mg / L, reaching the recycling water standard, COD Cr The removal rate reaches more than 80%.

Description

technical field [0001] The disclosure relates to a catalyst for advanced treatment of sewage by ozone catalytic oxidation, a preparation method thereof and a method of using the same to treat industrial wastewater. In particular, the present disclosure relates to a supported catalyst for ozone catalytic oxidation to treat coking industry wastewater, a preparation method thereof and a method of using the same to treat industrial wastewater. Background technique [0002] With the increasingly severe environmental protection situation, the sewage discharge indicators of the coking industry are becoming more and more stringent. Coking wastewater is very refractory industrial wastewater, mainly containing phenols, polycyclic aromatic compounds, heterocyclic compounds containing oxygen, nitrogen, sulfur, and refractory organic pollutants such as ammonia salts, thiocyanides, sulfides and cyanides . Using the current traditional physical and chemical treatment, biochemical treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/78C02F103/36
CPCB01J27/24C02F1/725C02F1/78C02F2103/365
Inventor 张英伟朱春梅尚素利杨洪庆曾志春尹祖建李彦霞陈战省路广乾
Owner 邢台旭阳科技有限公司
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