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A kind of heterogeneous metal catalyst for strengthening ozonation and its preparation method and application

A metal catalyst and ozone oxidation technology, applied in the field of catalysis, can solve the problems of high manufacturing cost, low cost and efficiency, and reduced catalyst load efficiency, and achieve the effects of reducing production cost, improving utilization rate, and improving oxidation efficiency.

Active Publication Date: 2015-12-09
SHANDONG DEYUAN BIOLOGICAL ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the experimental report, it is concluded that the multi-component catalytic doping system has a better oxidation effect than the single-component catalytic system, and the COD removal rate can be increased from 20% in the single-component catalyst to 33% in the multi-component catalyst; Adding is better than single-stage dosing. When the distribution ratio of ozone dosing is 6:3:1, the COD removal rate can be increased from 9% in single dosing to 19% in graded dosing; if sol-gel is used Glue method to make TiO 2 / Zeolite-supported catalyst combined with UV light and O 3 Research on the advanced treatment of petrochemical wastewater; there is also an integrated preparation process, that is, after mixing various metal oxides and other substances, they are calcined under certain process conditions to make catalysts for ozone oxidation catalysts, and the effect of advanced treatment on petrochemical wastewater is still high. Yes, but the manufacturing cost is too high; the above-mentioned methods are difficult to implement in industrial application, the catalyst load efficiency drops greatly in long-term continuous operation, and the cost-effectiveness ratio is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method is carried out as follows:

[0042] a. Take clay and granulate it with a diameter of 7mm, dry it in the air, and then fire it at 700°C for 4 hours to obtain ceramsite;

[0043] b. Take the ceramsite in step a and place it in a hydrochloric acid solution with a weight concentration of 5% to soak for 5 minutes, then rinse it with clean water until the pH value is 7, and then dry it with hot air at 80°C to obtain the ceramsite skeleton;

[0044] c. Take 7 parts by mass of fineness as 320 mesh Mno 2 , 3 parts by mass of Tio with a fineness of 100nm 2 , 5 parts by mass of Al with a fineness of 100nm 2 o 3 , 5 parts by mass of Fe with a fineness of 320 mesh 2 o 3 And the fineness of 60 mass parts is the loess mixing of 220 order, obtains powder;

[0045] d. Take the ceramsite skeleton of step b and put it in the coating granulator, spray water to wet the surface first, then spray the powder of step c until the thickness of the coating layer is 4.0mm...

Embodiment 2

[0049] The preparation method is carried out as follows:

[0050] a. Take clay and granulate it with a diameter of 12 mm, dry it in the air, and then fire it at 600°C for 5 hours to obtain ceramsite;

[0051] b. Take the ceramsite in step a and place it in a hydrochloric acid solution with a weight concentration of 3% to soak for 8 minutes, then rinse it with clean water until the pH value is 6, and then dry it with hot air at 100°C to obtain the ceramsite skeleton;

[0052] c. Take 12 parts by mass of fineness as 280 mesh Mno 2 , 7 parts by mass of Tio with a fineness of 1nm 2 , 9 parts by mass of Al with a fineness of 1nm 2 o 3 , 12 parts by mass of Fe with a fineness of 280 mesh 2 o 3 And the fineness of 80 mass parts is the loess mixing of 180 orders, obtains powder;

[0053] d. Take the ceramsite skeleton in step b and put it in the coating granulator, spray water to wet the surface first, then spray the powder in step c until the thickness of the coating layer is 1...

Embodiment 3

[0057] The preparation method is carried out as follows:

[0058] a. Take clay to granulate, the particle diameter is 9mm, dry in the air, and then fire at 650°C for 4.5h to obtain ceramsite;

[0059] b. Take the ceramsite in step a and place it in a hydrochloric acid solution with a weight concentration of 4%, soak it for 7 minutes, then rinse it with clear water until the pH value is 6.5 and dry it with 90° wind to obtain the ceramsite skeleton;

[0060] c. The fineness of taking 9 parts is 300Mno 2 , 5 parts by mass of Tio with a fineness of 50nm 2 , 7 parts by mass of Al with a fineness of 50nm 2 o 3 , 9 parts by mass of Fe with a fineness of 300 mesh 2 o 3 And the fineness of 70 mass parts is the loess mixing of 300 orders, obtains powder;

[0061] d. Take the ceramsite skeleton in step b and put it in the coating granulator, spray water to wet the surface first, then spray the powder in step c until the thickness of the coating layer is 1.5mm, and then air-dry, the...

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PUM

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Abstract

The invention provides a heterogeneous metal catalyst for ozonation enhancement as well as a preparation method and application of the catalyst. By mass parts, the catalyst adopts a ceramsite framework and is prepared by mixing 7-12 parts of MnO2, 3-7 parts of TiO2, 5-9 parts of Al2O3, 5-12 parts of Fe2O3 and 60-80 parts of loess, spraying to form a coating, attaching the coating to the ceramsite framework, and sintering. The heterogeneous metal catalyst for ozonation enhancement is used in an ozonation process, difficultly biodegradable organic matters in deep wastewater treatment of petroleum and chemical industries can be efficiently removed, the ozone utilization rate is increased, the wastewater treatment and production cost is greatly reduced, and the oxidation efficiency can be improved by 30%-120% in comparison with that in a single ozone addition process.

Description

Technical field: [0001] The invention relates to the technical field of catalysis, in particular to a heterogeneous metal catalyst for enhanced ozone oxidation, its preparation method and application Background technique: [0002] With the development of national industrialization, the spread of petrochemical industry wastewater pollution is becoming more and more serious, and the national and local water pollutant discharge standards are getting higher and higher. [0003] The production process of petrochemical products is long, there are many production devices, and the amount of sewage generated is large. Typical petrochemical sewage contains petroleum, CODCr, ammonia nitrogen, sulfur, phenol, cyanide and other conventional pollutants. At the same time, due to the different products of different enterprises, the sewage produced also contains a variety of characteristic pollutants related to their organic chemical products, such as polycyclic aromatic hydrocarbons, aromat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C02F1/78
Inventor 程帆孙琦张英君王宝冬王建忠
Owner SHANDONG DEYUAN BIOLOGICAL ENVIRONMENTAL PROTECTION ENG