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Supported normal-temperature formaldehyde removal catalyst, preparation method thereof, formaldehyde removal kit and air purification equipment

A supported and catalyst technology, applied in the field of air purification, can solve the problems of low efficiency and high cost of formaldehyde removal at room temperature, and achieve the effect of high formaldehyde removal efficiency

Inactive Publication Date: 2020-11-24
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a load-type normal temperature aldehyde removal catalyst and its preparation method, aldehyde removal kit and air purification equipment to solve the problems of high cost and low efficiency of normal temperature formaldehyde removal in the prior art

Method used

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  • Supported normal-temperature formaldehyde removal catalyst, preparation method thereof, formaldehyde removal kit and air purification equipment
  • Supported normal-temperature formaldehyde removal catalyst, preparation method thereof, formaldehyde removal kit and air purification equipment
  • Supported normal-temperature formaldehyde removal catalyst, preparation method thereof, formaldehyde removal kit and air purification equipment

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preparation example Construction

[0035] In a typical implementation of the present application, a method for preparing a supported catalyst for removing aldehydes at room temperature is provided, the preparation method comprising: Step S1, using a polyelectrolyte solution to impregnate the porous carrier to obtain polyelectrolyte-modified Porous carrier; Step S2, mixing and reacting the polyelectrolyte-modified porous carrier with a noble metal salt solution and a reducing agent to obtain a supported normal temperature aldehyde removal catalyst, which includes a polyelectrolyte modified porous carrier and a noble metal active Element.

[0036]In this application, the polyelectrolyte solution is first used to impregnate the porous carrier to obtain a polyelectrolyte-modified porous carrier. The surface of the polyelectrolyte-modified porous carrier has relatively abundant positive or negative charges, which increases the electrostatic adsorption on the surface of the carrier. site. When further mixing and rea...

Embodiment 1

[0058] (1) At 25°C, 10g of particles with a particle size of 30-70 mesh, an average pore size of 2.8nm, and a pore volume of 0.4cm 3 g -1 , specific surface area 1000m 2 g -1 The activated carbon was impregnated in 50mL of 0.01% polyallylamine hydrochloride aqueous solution with a mass fraction of 0.01%, and after ultrasonic treatment with a power of 400W for 6h, the solid and liquid were separated, and the obtained solid was washed with water and dried at 80°C for 12h to obtain the modified Activated carbon;

[0059] (2) At 25°C, disperse the obtained modified activated carbon into 50 mL of deionized water, and add 10 mL of 0.001mol·L -1 Chloroplatinic acid solution was continuously stirred for 90min to obtain a mixed system;

[0060] (3) 20mL 0.01mol·L -1 Add the ascorbic acid solution into the above mixing system, continue to stir at the above speed for 90 minutes, and then carry out solid-liquid separation, and dry the obtained solid in a blast oven at 80°C to complete ...

Embodiment 2

[0063] (1) At 25°C, 10g of particles with a particle size of 30-70 mesh, an average pore diameter of 7.8nm, and a pore volume of 0.5cm 3 g -1 , specific surface area 300m 2 g -1 The aluminum oxide was impregnated in 50mL of 0.01% polyallylamine hydrochloride aqueous solution with a mass fraction of 0.01%, and after ultrasonic treatment with a power of 400W for 6h, the solid and liquid were separated. Alumina;

[0064] (2) At 25°C, disperse the modified alumina obtained in step (1) into 50 mL of deionized water, and add 10 mL of 0.001mol·L -1 Chloroplatinic acid solution, continuously stirred for 90min to obtain a mixed system;

[0065] (3) 20mL 0.01mol·L -1 Add the ascorbic acid solution into the mixed system obtained in step (2), continue stirring at the above-mentioned speed for 90 minutes, and then perform solid-liquid separation, and dry the obtained solid in a blast oven at 80°C to complete the primary loading of the precious metal platinum;

[0066] (4) Step (2) an...

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Abstract

The invention provides a supported normal-temperature formaldehyde removal catalyst, a preparation method thereof, a formaldehyde removal kit and air purification equipment. The preparation method comprises the following steps of S1, performing dipping treatment on a porous carrier by adopting a polyelectrolyte solution to obtain a polyelectrolyte modified porous carrier; and S2, mixing the polyelectrolyte modified porous carrier with a precious metal salt solution and a reducing agent for reaction to obtain the supported normal-temperature formaldehyde removal catalyst, wherein the supportednormal-temperature formaldehyde removal catalyst comprises the polyelectrolyte modified porous carrier and precious metal active ingredients. The supported normal-temperature formaldehyde removal catalyst obtained by the preparation method disclosed by the invention purifies formaldehyde in an adsorption and catalysis combined manner; and the polyelectrolyte modification can increase the effectiveloading rate of the precious metal active ingredients and avoid local agglomeration, so that high formaldehyde removal efficiency of the low-load precious metal can be realized.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a loaded normal temperature aldehyde removal catalyst and a preparation method thereof, a aldehyde removal kit and air purification equipment. Background technique [0002] Formaldehyde is one of the most typical indoor air pollutants, and its emission mainly comes from various wood-based panels, furniture and decorative materials used in interior decoration. Long-term exposure can cause various discomforts and diseases in the human body, and even cause cancer, such as nasopharyngeal cancer, colon cancer, leukemia, etc. In 2010, the World Health Organization listed formaldehyde as the first class of human carcinogens, and listed the limit standard of indoor formaldehyde concentration as 0.1mg / m 3 , which is also the national standard for indoor air quality in China and the minimum standard for the health of the living environment. Therefore, the safe and effective redu...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01D53/86B01D53/72F24F3/16F24F13/28
CPCB01D53/8668B01D2257/70B01D2258/06B01J31/06B01J2231/70F24F13/28
Inventor 王贤波汪春节丁泺火封宗瑜劳承云
Owner GREE ELECTRIC APPLIANCES INC
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