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Catalyst particles for air purifiers and method for forming same by means of layer-by-layer cladding

A technology of catalyst particles and catalyst layers, applied in chemical instruments and methods, physical/chemical process catalysts, catalyst protection, etc., can solve problems such as difficult automatic control, and achieve the effects of improving purification efficiency, increasing contact area, and uniform particle size

Active Publication Date: 2015-12-02
UCHEER PURIFICATION & POLLUTION CONTROL TECH ZHEJIANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is difficult to achieve precise automatic control

Method used

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  • Catalyst particles for air purifiers and method for forming same by means of layer-by-layer cladding
  • Catalyst particles for air purifiers and method for forming same by means of layer-by-layer cladding
  • Catalyst particles for air purifiers and method for forming same by means of layer-by-layer cladding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Add 2g of water to 2g of diatomaceous earth, sieve the obtained core after the mixing is completed, take 0.4-0.6mm particles and add them to the sugar coating machine, and the rotation speed is 30 rpm. Add silica sol with a mass solubility of 20% at a rate of 2mL / min, and at the same time add catalyst powder at a rate of 5g / min, and collect 1.5-1.8mm particles through online detection to enter the next coating process. Add the above granules to another sugar-coating machine operating at the same speed, add silica sol with a mass solubility of 20% at a rate of 2mL / min, and simultaneously add activated carbon powder at a rate of 20g / min, and collect 2 -3mm particles. Add the above-mentioned collected granules to a drum dryer at 90°C and a rotating speed of 5r / min for drying and polishing, and take out the dried granules after 30 hours to be the final product.

[0060] Through BET test (see table 1), show that prepared catalyst particle specific surface area is at 550-700...

Embodiment 2

[0063] Add 1.5g of water to 1.5g of sepiolite, sieve the obtained core after the mixing is completed, take 0.4-0.6mm particles and add them to the sugar coating machine, and the rotation speed is 35 rpm. The CMC aqueous solution with a mass solubility of 20% was added at a rate of 5mL / min, and the catalyst powder was added at a rate of 5g / min at the same time, and particles of 1.5-1.8mm were collected by online detection to enter the next coating process. Add the above granules to another sugar coating machine running at the same speed, add a CMC aqueous solution with a mass solubility of 20% at a rate of 5mL / min, and simultaneously add silicon micropowder at a rate of 18g / min, and collect 2 -3mm particles. Put the above-mentioned collected granular products into a drum dryer with a temperature of 120°C and a rotational speed of 4 r / min for drying and polishing, and take out the dried particles after 20 hours to be the final product.

[0064] The performance test of the parti...

Embodiment 3

[0066]Add 1g of water to 1g of diatomaceous earth, sieve the obtained core after the mixing is completed, take 0.4-0.6mm particles and add them to the sugar coating machine, and the rotation speed is 20 rpm. Alumina sol with a mass solubility of 20% was added at a rate of 1 mL / min, and catalyst powder was added at a rate of 5 g / min, and particles of 1.5-1.8 mm were collected by online detection to enter the next coating process. Add the above granules to another sugar-coating machine operating at the same speed, add alumina sol with a mass solubility of 20% at a rate of 1mL / min, and add diatom mud at a rate of 15g / min at the same time, and pass the online detection Collect particles of 2-3 mm. Add the above-mentioned collected granules to a drum dryer with a temperature of 100°C and a rotational speed of 3r / min for drying and polishing, and take out the dried granules after 28 hours to be the final product.

[0067] The particle performance test is the same as in Example 1. T...

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Abstract

The invention provides catalyst particles for air purifiers and a method for forming the same by means of layer-by-layer cladding. The method includes acquiring core-shell structures by means of layer-by-layer cladding in particle forming procedures; manufacturing cores from selective clay mineral materials; cladding catalysts on the outsides of the cores; cladding safe and harmless inorganic porous materials such as activated carbon on the outermost layers of the cores by the aid of non-perishable inorganic adhesive in cladding procedures to obtain the spherical catalyst particles. The safe and harmless inorganic porous materials are used as framework materials. The spherical catalyst particles have uniform particle sizes, are high in catalytic activity and are non-perishable and non-mildew when stored at the room temperature for a long time The catalyst particles and the method have the advantages that the material adding speeds are automatically controlled, so that the uniformity of particle structures can be guaranteed; the spherical catalyst particles prepared by the aid of the method are high in catalytic efficiency, are non-perishable, have the uniform particle sizes and are safe and healthful.

Description

technical field [0001] The invention belongs to the field of catalyst production for air purification, and more specifically relates to a catalyst particle for an air purifier and a layer-by-layer coating molding method thereof. Background technique [0002] Due to their excellent catalytic properties, nanoscale metal oxide catalytic materials are widely used in the field of catalysis, especially in the catalytic decomposition of volatile harmful gases in the room at room temperature, such as formaldehyde, benzene, and diformaldehyde. In practical applications, the factors that affect the application performance of the catalyst include the catalyst's own performance and the physical and chemical indicators of the carrier (including specific surface area, pore diameter, pore volume, strength and surface properties, etc.), the dosage form of the catalyst on its application performance (such as Wind resistance, pressure drop, etc.) also have a significant impact. [0003] In t...

Claims

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Application Information

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IPC IPC(8): B01J21/16B01J33/00B01J35/10B01J37/02B01D53/86B01D53/72
Inventor 黄建国肖鸽王伟胡灯红
Owner UCHEER PURIFICATION & POLLUTION CONTROL TECH ZHEJIANG CO LTD
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