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Formaldehyde degradation catalyst

A formaldehyde degradation and catalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of incomplete mineralization of formaldehyde and achieve improved redox ability, reduce the cost of use, and improve the effect of practicality

Active Publication Date: 2016-06-15
吉林省东成环保工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Formaldehyde molecules are stable, oxidative degradation undergoes formic acid and then to CO 2 The process of polyoxometallates with weak oxidation ability cannot meet the needs of the above reactions, leading to the problem of incomplete mineralization of formaldehyde

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the reaction vessel, add a formaldehyde solution with a content of 0.1mg / L, and then add a vanadium- and molybdenum-containing polyoxometalate catalyst. The mass ratio of the solution to the catalyst is 100:3; air is introduced while stirring at room temperature and air pressure , the air flow rate is controlled at 0.03h / L, the stirring speed is controlled at 300rmp, the reaction is 12h, and the catalyst is separated by centrifugation; the degradation rate of formaldehyde reaches 69%; and the formaldehyde is mineralized into a simple inorganic molecule CO 2 and H 2 O.

Embodiment 2

[0037] In the reaction vessel, add a formaldehyde solution with a content of 0.5mg / L, and then add a vanadium- and molybdenum-containing polyoxometalate catalyst. The mass ratio of the solution to the catalyst is 100:1; air is introduced while stirring at room temperature and air pressure , the air flow rate is controlled at 0.1h / L, the stirring speed is controlled at 100rmp, the reaction is 3h, and the catalyst is separated by centrifugation; the degradation rate of formaldehyde reaches 78%; and the formaldehyde is mineralized into a simple inorganic molecule CO 2 and H 2 O.

Embodiment 3

[0039] In the reaction vessel, add a formaldehyde solution with a content of 50mg / L, and then add a vanadium- and molybdenum-containing polyoxometalate catalyst. The mass ratio of the solution to the catalyst is 100:5; air is introduced while stirring at room temperature and air pressure. The air flow rate is controlled at 0.09h / L, the stirring speed is controlled at 290rmp, the reaction is 12h, and the catalyst is separated by centrifugation; the degradation rate of formaldehyde reaches 94%; and the formaldehyde is mineralized into a simple inorganic molecule CO 2 and H 2 O.

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PUM

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Abstract

Relating to the technical field of treatment of organic pollutants in air and water, the invention discloses a formaldehyde degradation catalyst. The catalyst is a heteropolyoxometallate catalyst containing vanadium and molybdenum, and the general formula of the polyoxometallate is AgxH5-x[PMo10V2O40]. The invention also discloses a synthesis method of the catalyst and a method of catalytic oxidation of formaldehyde with the catalyst. The polyoxometallate based treatment technology for air degradation of formaldehyde has the characteristics of mild conditions, short treatment time and low operation cost, can reach a formaldehyde degradation rate up to 60%-95%, and can be used for treatment of formaldehyde in water and free formaldehyde gas, can achieve good treatment effect, is simple to operate, and does not cause secondary pollution. The polyoxometalate catalyst has the advantages of simple synthesis method, high catalytic activity and mild reaction conditions, overcomes the disadvantage of using precious metals as the catalyst at present, and is easy to operate.

Description

technical field [0001] The invention relates to the technical field of air and water organic pollutant treatment, in particular to a catalyst for formaldehyde degradation. Background technique [0002] Indoor air and water pollution has become an environmental problem that is widely concerned by countries all over the world. Formaldehyde, as a common important air and water pollutant, has been identified by the World Health Organization as a carcinogenic and teratogenic substance. general concern. Indoor formaldehyde mainly comes from decorative materials and new paints used in large quantities, so formaldehyde is one of the most common indoor pollutants. Formaldehyde in water mainly comes from industrial wastewater, and the content of formaldehyde discharged varies greatly due to different industries. Among them, the formaldehyde wastewater with the highest concentration is the upper tar wastewater from the production of phenolic resin, and the formaldehyde content is as h...

Claims

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Application Information

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IPC IPC(8): B01J31/18C02F1/72B01D53/86B01D53/72
CPCB01D53/8668B01J31/1845C02F1/725Y02A50/20
Inventor 张怀中张徐
Owner 吉林省东成环保工程有限公司
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