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Ozone catalyst and preparation method thereof

A catalyst, ozone technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of expensive metal oxides and environmental impact, achieve low cost, enhance adsorption performance, and reduce production. cost effect

Inactive Publication Date: 2016-03-09
BEIJING ORIGIN WATER FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The preparation of existing ozone oxidation catalysts generally uses porous adsorption media as the carrier, such as alumina, activated carbon, etc., and metal salts are loaded on the carrier by impregnation method, precipitation method, etc., and then roasted to obtain the loaded metal oxide. In this method, during the roasting process, the metal salt decomposes to produce nitrogen oxide gas, which has a serious impact on the environment
[0004] Another method is that during the catalyst molding process, the porous medium powder is used as the main body, mixed with metal oxides, and other materials required for the molding are kneaded to obtain the catalyst directly. This method avoids the nitrogen oxides generated by roasting , but metal oxides are expensive, causing an economic burden

Method used

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  • Ozone catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] A kind of preparation method of ozone catalyst, comprises the steps:

[0027] (1) Manganese sand filter material (the content of manganese dioxide is 20%, and the content of iron is 25%) is pulverized, and the grinding fineness is 50 orders; Get 100g of manganese sand filter material fine powder, add particle diameter and be 1 μm, moisture 20g of starch with a content of 0.01%, stir and mix evenly;

[0028] (2) Add 6 g of acetic acid and 1.2 g of water to the mixed powder and mix evenly, then knead for 1 min;

[0029] (3) After kneading, extrude into strips with a diameter of 2mm and a length of 10mm;

[0030] (4) Then dry at 80°C for 2 hours, and then bake at 1000°C for 2 hours in air to obtain a finished product.

Embodiment 2

[0032] A kind of preparation method of ozone catalyst, comprises the steps:

[0033] (1) pulverizing the pyrolus ore (the content of manganese dioxide is 45%), and the pulverizing fineness is 100 orders; get 200g of pyrolus ore fine powder, add the attapulgite 80g that particle diameter is 50 μm, moisture content is 0.1% , stir and mix evenly;

[0034] (2) Add 14g of citric acid and 2.8g of water to the mixed powder and mix evenly, then knead for 10min;

[0035] (3) After kneading, extrude into strips with a diameter of 3mm and a length of 5mm;

[0036] (4) Then dry at 90°C for 4 hours, and then bake at 800°C for 2 hours in air to obtain a finished product.

Embodiment 3

[0038] A kind of preparation method of ozone catalyst, comprises the steps:

[0039] (1) Manganese sand filter material (the content of manganese dioxide is 30%, and the content of iron is 20%) is pulverized, and the grinding fineness is 200 orders; Get 100g of manganese sand filter material fine powder, add particle diameter and be 50 μm, moisture 60g of diatomite with a content of 0.2%, stir and mix evenly;

[0040] (2) Add 1.6g of water to the mixed powder and mix evenly, then knead for 3min;

[0041] (3) After kneading, extrude into strips with a diameter of 4mm and a length of 7mm;

[0042] (4) Then dry at 100°C for 3 hours, and then bake at 500°C for 5 hours in air to obtain a finished product.

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Abstract

The invention relates to the technical field of catalyst preparation, in particular to an ozone catalyst which is low in cost and free of pollution and a preparation method of the ozone catalyst. A manganese sand filter material or pyrolusite ore serves as the raw material, adhesive, peptizer and a pore-expanding agent are added, and the ozone oxidation catalyst is finally formed through a series technologies of grinding, mixing, kneading, extrusion forming, drying and calcination and the like. According to the technical scheme, the catalyst is prepared by taking natural manganese sand or the pyrolusite ore as the raw material, the catalyst contains catalytic active components of manganese dioxide and iron, metallic elements do not need to be added, the production cost of the ozone catalyst is reduced, porous matter with the adsorptive action serves as the adhesive, the adsorption performance of the catalyst is effectively enhanced, the peptizer is added, the strength of the catalyst is enhanced, and certain pore expanding action is achieved. Due to the fact that the ozone catalyst is prepared through the method, nitrogen oxide pollution caused by calcination in the ordinary preparation process of an ozone catalytic oxidation catalyst is avoided, and the ozone catalyst and the preparation method thereof have the advantages of being low in cost, green and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a low-cost, pollution-free ozone catalyst and a preparation method thereof. Background technique [0002] Ozone is converted into hydroxyl radicals in the process of wastewater treatment, which has the advantages of non-selectivity, strong oxidation, and complete oxidation. In the oxidation process, due to the limitation of the conversion ability of ozone, most of the ozone is not used. In order to improve the utilization rate of ozone and improve the effect of wastewater treatment, the development of ozone oxidation catalyst has been paid more and more attention. [0003] The preparation of existing ozone oxidation catalysts generally uses porous adsorption media as the carrier, such as alumina, activated carbon, etc., and metal salts are loaded on the carrier by impregnation method, precipitation method, etc., and then roasted to obtain the loaded metal oxide. In ...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/34C02F1/78C02F1/72
CPCB01J23/8892B01J23/34B01J37/0009C02F1/725C02F1/78
Inventor 陈亦力李新涛张夏颖张思强代攀李锁定
Owner BEIJING ORIGIN WATER FILM TECH
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