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Composite catalyst for decomposing ozone and preparation method of composite catalyst

A composite catalyst and composite oxide technology, applied in separation methods, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of reducing catalyst catalytic activity, unfavorable safety production, and complicated preparation processes. and other problems, to achieve the effect of improving the catalytic effect, fewer synthesis steps, and good dispersion effect.

Active Publication Date: 2016-12-07
NINGBO TAIAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is complicated, and many dangerous reagents are used, which is not conducive to the realization of safe production, so it is difficult to implement industrial production; and it is easy to cause agglomeration in the final high-temperature roasting process, which reduces the catalytic activity of the catalyst

Method used

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  • Composite catalyst for decomposing ozone and preparation method of composite catalyst
  • Composite catalyst for decomposing ozone and preparation method of composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Fully dissolve 19.8g manganese chloride tetrahydrate in 100mL pure water, fully dissolve 34.76g potassium permanganate in 200mL pure water, then dissolve 0.25g copper sulfate pentahydrate in 50mL pure water, and mix the above three solutions Fully dissolved for use. The above-mentioned three solutions were quickly mixed and stirred, and the above-mentioned mixed solution was stirred and reacted at room temperature for 10 h, and then cleaned by suction filtration to obtain a composite oxide filter residue. Add the filter residue obtained above to the ultrafine grinding equipment, add 19g of water to obtain a suspension with a solid content of 50%, select 0.2mm zirconia balls, and set the speed of the ultrafine mill to 2100r / min for grinding for 10h. The ground suspension was freeze-dried at -50°C for 20 hours to obtain a highly dispersed composite catalyst powder.

[0032] SEM tested (see figure 2 ), showing that the synthesized composite catalyst for decomposing ozon...

Embodiment 2

[0035] Fully dissolve 7.8g manganese sulfate tetrahydrate in 100mL pure water, fully dissolve 22.1g potassium permanganate in 100mL pure water, then dissolve 6.03g copper chloride dihydrate in 95mL pure water, and mix the above three solutions Fully dissolved for use. The above three solutions were quickly mixed and stirred, and the above mixed solution was stirred and reacted at 0° C. for 30 h, and then filtered and washed to obtain a composite oxide filter residue. Add the filter residue obtained above to the ultrafine milling equipment, add 36.4g of water to obtain a suspension with a solid content of 30%, select 0.3mm alumina balls, and set the speed of the ultrafine mill to 1500r / min for grinding for 6h. The ground suspension was freeze-dried at -20°C for 15 hours to obtain a composite catalyst powder for decomposing ozone.

[0036] The catalytic performance test is the same as in Example 1. The test results show that the highly dispersed composite catalyst prepared in t...

Embodiment 3

[0038]Fully dissolve 14.35g manganese nitrate hexahydrate in 130mL pure water, fully dissolve 22.1g potassium permanganate in 200mL pure water, fully dissolve 8.45g copper nitrate trihydrate in 85mL pure water, and fully dissolve the above three solutions Dissolve and set aside. The above three solutions were quickly mixed and stirred, and the above mixed solution was stirred and reacted at 40° C. for 5 hours, and then filtered and washed to obtain a composite oxide filter residue. Add the filter residue obtained above to the ultrafine grinding equipment, add 187.4g of water to obtain a suspension with a solid content of 10%, select 0.4mm alumina balls, and set the speed of the ultrafine mill to 1800r / min for grinding for 1h. The ground suspension was freeze-dried at 0° C. for 30 h to obtain a composite catalyst powder for decomposing ozone.

[0039] The catalytic performance test is the same as in Example 1, and the test results show that the highly dispersed composite catal...

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Abstract

The invention relates to a method for preparing a composite catalyst for decomposing ozone. The method comprises the following steps: separately dissolving permanganate, an Mn<II> salt and a Cu<II> salt, so as to obtain three kinds of salt solutions; rapidly mixing the three kinds of salt solutions, stirring, carrying out an oxidation-reduction reaction, and then, carrying out filtrating and washing, so as to obtain filtrated residue of a composite oxide; adding the filtrated residue into water, carrying out mixing so as to form a suspension of the filtrated residue and the water, carrying out extra-fine grinding treatment on the suspension so as to thoroughly grind the suspension, and then, carrying out a freeze-drying process, thereby obtaining the composite catalyst for decomposing the ozone. According to the method provided by the invention, the number of synthesis steps is small, the synthesis conditions are simple, the process of extra-fine grinding treatment is simple, the dispersion effect is good, and various substances in the prepared composite catalyst are thoroughly mixed and doped, so that the catalysis effect is improved remarkably.

Description

technical field [0001] The invention relates to a preparation method of an environmental protection and air purification material, in particular to a composite catalyst for catalyzing ozone decomposition and a preparation method thereof. Background technique [0002] Ozone (O 3 ) is a light blue gas with a special odor, which mainly exists in the ozone layer 20-35 kilometers away from the earth's surface, and resists the direct irradiation of ultraviolet rays on the earth. Normally, inhalation of a small amount is beneficial to the human body, but excessive inhalation is harmful to human health. The national standard stipulates that the ozone concentration in indoor air shall not exceed 0.08mg / m 3 , the maximum allowable concentration of ozone is 0.16mg / m 3 , Once this concentration is exceeded, it will cause harm to the human body. Excessively high concentrations of ozone can irritate the respiratory tract, causing damage to the throat, trachea, and lungs. In severe cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/66
CPCB01D53/8675B01J23/8892Y02A50/20
Inventor 黄建国肖鸽胡灯红
Owner NINGBO TAIAN NEW MATERIAL TECH CO LTD
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