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Iron-copper composite oxide supported catalyst for room-temperature ozonolysis

A composite oxide and catalyst technology, applied in physical/chemical process catalysts, chemical/physical processes, separation methods, etc., can solve the problems of short service life, limited extensive use, limited service life, etc., to achieve long service life, no two Sub-pollution, low cost effect

Inactive Publication Date: 2013-06-05
倪凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1259398A is based on MnO 2 The main active component is a catalyst with nickel or copper or cobalt oxide as an auxiliary agent and activated carbon as a carrier. The disadvantage of this catalyst is that its service life is short
But their limited lifetime or the need for additional energy input limits their widespread use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 400mL deionized water to a 1000mL beaker, Fe 2 (SO 4 ) 3 and CuCl 2 Add it to make the Fe / Cu molar ratio 2:1, stir to dissolve it, and then add an appropriate amount of 1mol / L NaOH solution to make Fe 3+ and Cu 2+ Precipitation is complete. Filter and wash the resulting precipitate until neutral, dry at 60°C for 12 hours, and roast at 500°C for 4 hours to obtain Fe with a molar ratio of Fe / Cu of 2. 2 o 3 - CuO composite oxide powder;

[0019] Weigh a certain amount of Fe 2 o 3 -CuO composite oxide powder, adding a certain amount of deionized water to adjust the pH value to 7. Appropriate amount of HAuCl 4 The solution was dropped into the above suspension, so that the content of Au accounted for 1% of the total, and the pH value was adjusted to 7 again. Heat the suspension to 50°C for 3 hours, filter and wash until free of Cl - Au / Fe 2 o 3 -CuO composite oxide supported catalyst;

Embodiment 2

[0021] Add 400mL deionized water into a 1000mL beaker, Fe(NO 3 ) 3 and CuSO 4 Add it to make the Fe / Cu molar ratio 5:1, stir to dissolve it, and then add an appropriate amount of 1mol / L NaOH solution to make Fe 3+ and Cu 2+ Precipitation is complete. The resulting precipitate was filtered, washed, dried at 60°C for 12 hours, and calcined at 500°C for 4 hours to obtain Fe with a molar ratio of Fe / Cu of 5. 2 o 3 - CuO composite oxide powder;

[0022] Weigh a certain amount of Fe 2 o 3 -CuO composite oxide powder, adding a certain amount of deionized water to adjust the pH value to 7. Appropriate amount of HAuCl 4 The solution was dropped into the above suspension, so that the content of Au accounted for 1% of the total, and the pH value was adjusted to 7 again. Heat the suspension to 50°C for 3 hours, filter and wash until free of Cl - Au / Fe 2 o 3 -CuO composite oxide supported catalyst;

Embodiment 3

[0024] Au / Fe 2 o 3 - Preparation of CuO honeycomb ceramic monolithic catalyst I:

[0025] The Fe / Cu mol ratio that embodiment one obtains is the Au / Fe of 2 2 o 3 -CuO catalyst placed in deionized water, adding a certain amount of silica gel binder, stirring at high speed to obtain Au / Fe 2 o 3 -CuO composite oxide slurry; the pre-treated honeycomb ceramic support is impregnated in Au / Fe 2 o 3 -CuO composite oxide slurry after 0.5~5min, take it out, blow off the residual liquid in the channel, dry in the air at 80°C for 12h, and roast at 200°C for 6h to obtain Au / Fe 2 o 3 -CuO honeycomb ceramic monolithic catalyst I;

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PUM

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Abstract

The invention discloses an iron-copper composite oxide supported catalyst for room-temperature ozonolysis, particularly relates to an ozonolysis catalyst and a preparation method of the ozonolysis catalyst, and relates to the fields of catalysis and environmental protection. Honeycomb ceramics or multi-hole foam metal or activation carbon fiber cloth is used as a carrier of the catalyst, iron-copper composite oxide is a main active component, and gold is an auxiliary active component. The preparation method mainly comprises: A. Fe2O3-CuO composite oxide powder is prepared through the adoption of a precipitation method; B. the powder is dispersed in water, the PH value of the water is adjusted to be 7-8, HAuCl4 solution is dropped in the water, and the PH value of the water is again adjusted to be 7-8; C. the suspension liquid is heated to 30-50 DEG C, reacts for 1-3 hours, and is filtered, washed, dried and roasted to obtain a target product; and D. deionized water and silica gel which are provided with a fixed ratio are added to the catalyst to be processed into seriflux, the carrier of the catalyst is placed in the seriflux, soaked, taken out and then dried and roasted. The catalyst prepared by adopting the method is simple in process, low in cost, and high in catalytic activity and stability for ozonolysis in the indoor air.

Description

technical field [0001] The invention relates to an iron-copper composite oxide supported catalyst. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. Background technique [0003] The printer / copier can be said to be the necessary office equipment for every company. The ozone generated by corona discharge and high-voltage discharge during its use is the main source of ozone in the indoor office environment. Low-concentration ozone has the effect of fresh air, disinfection and sterilization, but high-concentration ozone is extremely harmful to the human body. Studies have shown that the ozone concentration is 0.2-1.0mg / m 3 When the ozone concentration is 1.88~18.8mg / m 3 Sometimes it will cause coughing, chest pain and vomiting; when the ozone concentration is as high as 20mg / m 3 Sometimes it will cause emphysema, and it will also damage the vitamin E in the human skin, causing the skin to wrinkle and appear dark spots, and e...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/10B01D53/86B01D53/66
Inventor 倪凯
Owner 倪凯
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