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Method for preparing ceramsite catalyst for ozone catalytic oxidation

An ozone catalytic oxidation and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of large catalyst loss rate, difficult industrial production, and adhesion strength. It can reduce secondary pollution, realize large-scale industrial production, and improve strength.

Active Publication Date: 2008-05-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then stir and mix, wash and filter the carrier, and finally bake the preparation. Since this type of preparation method is to attach the catalyst to the surface of the carrier, there are a large number of reaction by-products in the preparation process, and a large amount of catalyst that cannot be attached to the surface of the carrier needs to be removed by washing. cause a lot of waste
In addition, because the catalyst is attached to the surface of the carrier by baking, its adhesion strength is poor, and the loss rate of the catalyst after repeated use is relatively large, and because this type of production method has cumbersome steps, it is difficult to achieve large-scale industrial production

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] First, fly ash, kaolin, and swelling agent are used as raw materials for the production of ceramsite. The swelling agent is magnesium aluminosilicate, and the ceramsite raw material core with a particle size of 1-1.5mm is prepared through a sugar coating preparation machine. In terms of weight percent, the respective proportions of fly ash, kaolin and bulking agent are: 50%, 35%, and 15%. Add 10% MnO to the raw material for preparing ceramsite 2 with 10% Fe 2 o 3 , crush the two metal oxides to a particle size of 0.1-1 mm, and mix them. Then use the model YK60-160 sugar coating preparation machine to wrap the mixture firmly on the unbaked small ceramsite core to generate 3-4mm unbaked ceramsite, and finally bake them together. The baking condition is 1000 degree to prepare an ozone oxidation catalyst. Ozone oxidation is used to treat a certain daily chemical wastewater, and the dosage of ozone is O 3 : COD=0.5:1, COD is reduced from 120mg / L to 90mg / L, adding ozone ...

Embodiment 2

[0022] First use fly ash, kaolin, and bulking agent as raw materials for the production of ceramsite. The bulking agent is magnesium aluminosilicate, and the ceramsite raw material core with a particle size of 1.5-2mm is prepared through a model YK60-160 sugar coating preparation machine, and the weight percentage Calculated, the respective proportions of fly ash, kaolin and bulking agent are: 60%, 25%, and 15%. Before the raw material core is not baked, add 5% of MnO and MnO respectively to the raw material for preparing ceramsite 2 、TiO 2 , CoO, Co 3 o 4 1. Pulverize these four metal oxides into powder and mix them. Then use the sugar coating preparation machine to wrap the mixture firmly on the unbaked small ceramsite core to form 4-5mm unbaked ceramsite, and finally bake them together. The baking condition is 1100 degrees to prepare ozone oxidation catalyst. Using ozone oxidation to treat phenolic wastewater in a chemical plant, the dosage of ozone is O 3 : Phenol=1,...

Embodiment 3

[0024] First use fly ash, kaolin, and bulking agent as raw materials for the production of ceramsite. The bulking agent is magnesium aluminosilicate, and the raw material core of ceramsite with a particle size of 2-2.5mm is prepared through a sugar coating preparation machine model YK60-160, and the raw material core of ceramsite is prepared by weight percentage Calculated, the respective proportions of fly ash, kaolin and bulking agent are: 45%, 40%, and 20%. Before the raw material core is not baked, add MnO, which accounts for 15% of the raw materials mixed with it, to the raw materials for preparing ceramsite 2 、Co 3 o 4 , Fe 2 o 3 The three metal oxides were pulverized and mixed. Then use the sugar coating preparation machine to wrap it firmly on the unbaked small ceramsite core to form 5-8mm unbaked ceramsite, and finally bake it together. The baking condition is 1200 degrees to prepare ozone oxidation catalyst. Ozone oxidation is used to treat tank washing wastewa...

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Abstract

The invention discloses a preparation method of haydite catalyst for catalytic ozonation. The method comprises the preparation of the haydite raw material nuclear, and the coating and the sintering process of the catalyst on the haydite raw material nuclear. The coating of the catalyst on the haydite raw material is used for crushing one or a plurality of the composite catalyst activity component(s) of MnO, MnO2, TiO2, CoO, Co3O4, Fe2O3, Fe4O3, and FeO into particles with the diameter of 0.1-1mm and being mixed with the raw materials produced by the haydites to produce 3-4mm haydites for coating catalyst. The haydite catalyst for catalytic ozonation is made. After mixture, the catalyst and the haydite raw material are loaded on the original haydite raw material nuclear with high adhesion strength, and meanwhile the once sintering molding guarantees the high utilization ratio of the catalyst, and the prepared haydite catalyst can be used repeatedly, thus reducing secondary pollution and operation cost of ozonation.

Description

technical field [0001] The invention relates to an ozone catalytic oxidation catalyst, in particular to a preparation method of a ceramsite catalyst used for ozone catalytic oxidation. The application of the ceramsite catalyst can improve the oxidation efficiency of ozone to organic matter in waste water, thereby efficiently treating waste water and polluted source water, especially waste water containing refractory organic matter. Background technique [0002] Ozone has extremely strong oxidizing properties, and its oxidizing ability is second only to fluorine, higher than chlorine and potassium permanganate. Ozone is an ideal green oxidizing agent for water treatment based on its strong oxidizing properties and self-decomposition in water in a short period of time without secondary pollution. [0003] At present, ozone technology has been applied in many aspects in the field of water treatment. Ozone not only has a strong disinfection and sterilization effect, but also c...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J21/06B01J21/16C02F1/78
Inventor 汪晓军陈思莉颜述敏
Owner SOUTH CHINA UNIV OF TECH
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