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Process for preparing organic gas purification catalyst

A technology for purifying catalysts and organic gases, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high price of precious metals, high processing temperature, unsatisfactory effect, etc., and achieve good results Purification effect, process safety, low price effect

Inactive Publication Date: 2005-09-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing catalysts need to be processed at high temperatures, and the effect is not ideal at low temperatures; or they use precious metals, which are expensive and easy to poison

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take Al 2 o 3 Pour 600 grams and 320 grams of Na(OH) (Na / Al ratio 1.20) into 1000 grams of distilled water at the same time, stir well and maintain the reaction temperature at 65°C for 1 hour, and place it at an ambient temperature of 25°C for 24 hours; Wash the material with 0.1% ammonia water after vacuum filtration, and then fully dissolve in 0.7% nitric acid; add NaOH to adjust the pH value of the solution to 10.0 to obtain a suspension solution; 2 and CuO powder (MnO 2 : CuO=3:2) mixed thoroughly and then added to the suspension; the mixed solution was filtered and granulated; dried at 105°C for 12 hours, heated to 360°C for 1.5 hours, dried at 650°C for 2.5 hours and naturally cooled to room temperature to obtain required catalyst.

[0017] Using the prepared catalyst, the cooking fume exhaust gas from the catering industry is treated at a treatment temperature of 200 ° C. The total concentration is about 100 mg / L, and the contact time of the gas catalyst is 3 ...

Embodiment 2

[0019] Take Al 2 o 3 Pour 600 grams and 320 grams of Na(OH) (Na / Al ratio 1.20) into 1000 grams of distilled water at the same time, stir well and maintain the reaction temperature at 65°C for 1 hour, and place it at an ambient temperature of 25°C for 24 hours; Wash the material with 0.1% ammonia water after vacuum filtration, and then fully dissolve in 0.7% nitric acid; add NaOH to adjust the pH value of the solution to 10.0 to obtain a suspension solution; 2 and CuO powder (MnO 2 : CuO=3:2) mixed thoroughly and then added to the suspension; the mixed solution was filtered and granulated; dried at 105°C for 12 hours, heated to 360°C for 1.5 hours, dried at 650°C for 2.5 hours and naturally cooled to room temperature to obtain required catalyst.

[0020] Using the prepared catalyst, the cooking fume exhaust gas from the catering industry is treated at a treatment temperature of 200°C. The total concentration is about 220 mg / L, and the contact time of the gas catalyst is 3 se...

Embodiment 3

[0022] Take Al 2 o 3 Pour 600 grams and 320 grams of Na(OH) (Na / Al ratio 1.20) into 1000 grams of distilled water at the same time, stir well and maintain the reaction temperature at 65°C for 1 hour, and place it at an ambient temperature of 25°C for 24 hours; Wash the material with 0.1% ammonia water after vacuum filtration, and then fully dissolve in 0.7% nitric acid; add NaOH to adjust the pH value of the solution to 10.0 to obtain a suspension solution; 2 and CuO powder (MnO 2 : CuO=3:2) mixed thoroughly and then added to the suspension; the mixed solution was filtered and granulated; dried at 105°C for 12 hours, heated to 360°C for 1.5 hours, dried at 650°C for 2.5 hours and naturally cooled to room temperature to obtain required catalyst.

[0023] Using the prepared catalyst, the cooking fume exhaust gas from the catering industry is treated at a treatment temperature of 200°C. The total concentration is about 100 mg / L, and the contact time of the gas catalyst is 3 se...

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PUM

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Abstract

The invention provides a method for preparing an organic gas purifying catalyst. The catalyst uses gamma-Al2O3 as the carrier, and is made of the mixture of the MnO2 powder and CuO powder in a certain ratio. The method comprises the following steps: a) pouring the Al2O3 and Na (OH) into the distilled water to react, b) vacuum filtering the deposit after stewing, then washing them and dissolving them to the azotic acid of 0.7%, c) adding the NaOH to adjust the PH, and adding the mixture of the MnO2 and CuO powder, d) filtering and cubing, e) drying in high temperature three times, natural cooling to the room temperature and getting the catalyst. The method is easy to operate and has a good and widely purifying effect in low temperature, while it is stable in high temperature and can be used for a long period of time, thus it can be used for many kinds of smoke purifying.

Description

technical field [0001] The invention relates to a preparation method of an organic gas purification catalyst, which uses γ-Al 2 o 3 As a carrier, the prepared catalyst can efficiently treat organic gases at lower temperatures. It belongs to the technical field of environmental catalysis. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with a saturated vapor pressure greater than 70 Pa at normal temperature and a boiling point within 260 °C at normal pressure, and are one of the most important factors that cause air pollution. VOCs are various and widely distributed, mainly from industrial emissions. According to the Environmental Priority Pollutant List of the US Environmental Protection Agency, VOCs account for more than 80% of the total pollutants. Japan's environmental census since 1974 shows that among the detected environmental chemical poisons, VOCs account for 70% of the total detected poisons. Since entering the industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72B01D53/86B01J23/889B01J37/03
Inventor 杨骥贾金平王亚林
Owner SHANGHAI JIAO TONG UNIV
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