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Manganese-based composite oxide catalyst for catalytically decomposing ozone, and preparation method of manganese-based composite oxide catalyst

A composite oxide, catalytic decomposition technology, applied in the field of manganese-based composite oxide catalyst and its preparation, can solve the problems of poor moisture resistance, short life, high cost of precious metals, etc., to achieve good moisture resistance, reduce hazards, and catalyst life long effect

Active Publication Date: 2012-07-25
上海棕晟企业管理合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a novel manganese-based composite oxide catalyst and its preparation method in order to solve the problems of short service life, poor moisture resistance, and high cost caused by the use of precious metals in existing catalysts that catalyze the decomposition of ozone , can be used as water or air treatment and catalytic decomposition of ozone produced by modern industry and household appliances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 Precipitation method prepares manganese-based composite oxide catalyst

[0054] Dissolve manganese nitrate and ferric nitrate in water respectively, prepare a solution with a molar ratio of Mn / Fe of 1 and mix well, add excess urea to the solution, and continuously stir at 90°C for 12 hours, then perform suction filtration and wash for 3 The filter cake was obtained for the first time, and the filter cake was dried in an oven at 100°C for 10 hours, and finally calcined in air at 500°C for 5 hours in a muffle furnace to obtain a powdered catalyst. The prepared catalyst was pressed into tablets, crushed, sieved, and 20-40 meshes were taken for later use, which was called catalyst A.

Embodiment 2

[0055] Embodiment 2 Precipitation method prepares manganese-based composite oxide catalyst

[0056] Dissolve manganese chloride and copper sulfate in water respectively, prepare a solution with a Mn / Cu molar ratio of 0.2 and mix uniformly, slowly add excess sodium carbonate to the solution while stirring, then separate by suction filtration and wash to obtain a filter cake. The filter cake was dried in an oven at 120°C for 5 hours, and finally calcined in air at 300°C for 24 hours in a muffle furnace to obtain a powdered catalyst. The prepared catalyst is pressed into tablets, ground, sieved, and 20-40 meshes are taken for later use.

Embodiment 3

[0057] Embodiment 3 Precipitation method prepares manganese-based composite oxide catalyst

[0058] Dissolve manganese nitrate, copper sulfate and nickel nitrate in water respectively, prepare a solution with a molar ratio of Mn / (Cu+Ni) of 0.5 and mix evenly, slowly add excess sodium carbonate to the solution while stirring, then vacuum filter and wash The filter cake was obtained 4 times, and the filter cake was put into an oven and dried at 80°C for 36 hours, and finally roasted in air at 800°C for 3 hours in a muffle furnace to obtain a powdered catalyst. The prepared catalyst is pressed into tablets, ground, sieved, and 20-40 meshes are taken for later use.

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Abstract

The invention relates to a manganese-based composite oxide catalyst for catalytically decomposing ozone, and a preparation method of the catalyst. The catalyst comprises manganese oxide and at least one transition metal oxide. The preparation method is a homogeneous precipitation method or a hydrothermal synthesis method. The manganese-based composite oxide catalyst adopts innocuous and non-poisonous materials, prepares a manganese-based composite oxide catalyst with high catalytic activity, good wet resistance and high catalytic deposition content by the simple and easy method, so that the catalyst is suitable for catalytically decomposing ozone produced in water or air treatment and modern industry and home appliance.

Description

technical field [0001] The present invention relates to a catalyst, in particular to a manganese-based composite oxide catalyst for catalytically decomposing ozone, in particular to a manganese-based composite oxide catalyst for catalytically decomposing ozone produced in water or air treatment and modern industry and household appliances Oxide catalyst and method for its preparation. Background technique [0002] Ozone (O 3 ) and oxygen (O 2 ) is an allotrope of oxygen, at room temperature, ozone (O 3 ) is an unstable lavender gas with a special fishy smell. In recent years, due to its strong oxidizing properties, ozone has been increasingly widely used in wastewater treatment as a disinfectant, bactericide and deodorant. However, the remaining ozone that is not consumed after water treatment will be discharged into the atmosphere to pollute the environment. With the improvement of modern office equipment, a large number of copiers, printing machines, fax machines and ...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/03B01J37/10B01D53/86B01D53/66C02F1/58
CPCY02C20/30Y02A50/20
Inventor 贺泓连志华马金珠单文坡张长斌王少莘
Owner 上海棕晟企业管理合伙企业(有限合伙)
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