Formaldehyde elimination agent and preparation method thereof

A technology of formaldehyde eliminating agent and carbonate, which is applied in the field of air pollution control, can solve the problems of not showing the adsorption performance of materials, etc., and achieve the effect of low operation cost, cheap price and simple preparation process

Active Publication Date: 2011-11-23
沈阳领拓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The recent patent application by Qu Zhenping and others (publication number CN101898149) shows that the nano-metallic silver loaded on the oxide can adsorb formaldehyde at room temperature, and can completely oxidize formaldehyde to carbon dioxide and water at 85°C, but their patent Reports do not show adsorption properties of the prepared material
In the patent (CN101450315) of Yang Xiangguang's research group recently, a kind of air purification device has been reported. In this device, activated carbon felt adsorption material and catalytic material are configured, and at room temperature, trace organic matter in the air is adsorbed by activated carbon felt while the catalyst is in a constant state. In the heated state, when the adsorption capacity of the activated carbon felt is close to saturation, the activated carbon felt is heated, and the desorbed high-concentration organic pollutants are completely oxidized into carbon dioxide and water through the temporarily heated catalyst. This scheme realizes energy saving through intermittent heating. However, it is necessary to configure a diversion device and two sets of blower devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A scavenger with a metal element weight content of 1% and a molar ratio of manganese and potassium of 10:1 is prepared by an equal-volume sub-step impregnation method. 0.03043 grams of manganese nitrate (Mn(NO 3) 2 ) was dissolved in 1.80 ml of distilled water. Take 0.900 grams of commercial macroporous silica gel with a BET specific surface area greater than 300 square meters per gram, pour the silica gel into the prepared manganese nitrate solution, then dry it at room temperature, and roast it in the air at 500 ° C for 1 hour, down to At room temperature, a scavenger precursor of manganese oxide supported on silica gel was prepared. Weigh 0.0017 grams of potassium nitrate (KNO 3 ) was dissolved in 1.80 milliliters of distilled water, and the scavenger precursor of the silica gel-loaded manganese oxide obtained in the previous step was poured into the prepared potassium nitrate solution. Then dry at room temperature, bake at 500° C. for 1 hour in the air, and drop...

Embodiment 2

[0030] The scavenging agent with a weight content of metal elements of 10% and a molar ratio of manganese and potassium of 1:1 is prepared by an equal-volume sub-step impregnation method. 0.1841 grams of manganese acetate ((CH 3 COO) 2 Mn) was dissolved in 1.62 ml of distilled water. Take 0.900 grams of commercial macroporous silica gel with a BET specific surface area greater than 300 square meters per gram, pour the silica gel into the prepared manganese acetate solution, then dry it at 100°C, bake it in air at 350°C for 4 hours, and cool it down to room temperature , to prepare the scavenger precursor of manganese oxide supported on silica gel. Weigh 0.0735 grams of potassium carbonate (K 2 CO 3 ) was dissolved in 1.62 milliliters of distilled water, and the scavenger precursor of the silica gel-loaded manganese oxide prepared in the previous step was poured into the prepared potassium carbonate solution. Dry at 100 DEG C then, roast 4 hours at 350 DEG C in the air, be...

Embodiment 3

[0032] A scavenger with a weight content of metal elements of 10% and a molar ratio of manganese and potassium of 1:10 is prepared by an equal-volume sub-step impregnation method. 0.2201 g of potassium acetate (CH 3 COOK) was dissolved in 1.62 ml of distilled water. Take 0.900 g of commercial macroporous silica gel with a BET specific surface area greater than 300 m2 / g. Pour the silica gel into the prepared potassium acetate solution, then dry it at 50°C, bake it in the air at 400°C for 2 hours, and lower it to room temperature to prepare the silica gel-loaded potassium oxide scavenger precursor. Weigh 0.0401 gram of manganese nitrate (Mn(NO 3 ) 2 ) was dissolved in 1.62 milliliters of distilled water, and the scavenger precursor of the silica gel-loaded potassium oxide obtained in the previous step was poured into the prepared manganese nitrate solution. Dry at 50 DEG C then, in air at 400 DEG C roasting 2 hours, be down to room temperature, make metal element weight cont...

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Abstract

The invention provides a formaldehyde elimination agent and a preparation method thereof. The formaldehyde elimination agent comprises a carrier and active components, wherein the carrier is macroporous silica gel with BET (Specific Surface Area) larger than 300 square meters / gram and an average pore size larger than 10 nanometers; the active components are manganese oxides, alkali metal oxides or carbonates and account for 1-20 percent of total weight in terms of metals; and the ratio of the amounts of substances of manganese and alkali metal elements is 1:10-10:1. The formaldehyde elimination agent provided by the invention has the advantages of easiness in preparation, low cost, good using effect, easiness in regeneration after inactivation, good application prospect and great reduction of the using cost of elimination agents.

Description

technical field [0001] The invention relates to a method for controlling air pollution, in particular to a preparation for eliminating formaldehyde in the air. The invention also relates to a preparation method of a preparation for eliminating formaldehyde in the air. Background technique [0002] Formaldehyde is a common pollutant in the indoor atmosphere, and it has high toxicity. Short-term exposure to low concentrations of formaldehyde can irritate the eyes and respiratory tract and cause allergic reactions, and long-term exposure to trace amounts of formaldehyde can increase the possibility of cancer. Formaldehyde has been identified as a teratogenic and carcinogenic substance by the World Health Organization. The "Indoor Air Quality Standard" (GB / T18883-2002), which was implemented in my country in 2003, stipulates that the maximum allowable concentration of formaldehyde in indoor air is 0.10 mg per cubic meter (1 hour average). [0003] Existing technologies for el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/72B01D53/86B01J20/10B01J20/32B01J23/34B01J35/10
Inventor 杨治张琼
Owner 沈阳领拓科技有限公司
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