A kind of coating method of high-strength nano-powder coating

A nano-powder, high-strength technology, applied in the field of catalyst coating, can solve the problem of low conversion rate of formaldehyde, and achieve the effect of improving coating efficiency, improving weather resistance, adhesion, and good leveling

Active Publication Date: 2016-04-13
JINHU COLOR POWDER COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem that the existing nano-catalysts are difficult to be evenly and firmly coated on the porous carrier with large surface area, which leads to the low conversion rate of formaldehyde, and to provide a method that can make the nano-catalyst uniformly and firmly coated on the porous carrier with large surface area. Above, the nano-catalyst coating method that can greatly improve catalyst activity, the catalyst film layer glossiness that uses the method for coating of the present invention is better, and adhesion is better

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Taking nano-titania carrier loaded with noble metal catalytic powder as an example, a porous honeycomb ceramic carrier catalyst module assembly was manufactured. Pour the small balls that come with the ball mill into the ball mill jar, add 1.5L of deionized water to the ball mill jar, the water surface must exceed the highest surface of the ball, put 500g of catalyst powder, fluorine-containing acrylate monomer, unsaturated polyester resin 1. The pigment is added into a ball mill jar for ball milling. The ball milling time is 60 minutes. Pour out the mixed solution and rinse the ball with 500ml of deionized water. One or more aluminosilicates of silica sol, sodium silicate, sodium aluminate, potassium silicate, and potassium aluminate and one or more of sodium carbonate, potassium carbonate, sodium hydroxide, and potassium hydroxide The basic compound and hydroxyethyl methylcellulose are compounded to obtain a composite binder. The catalyst powder slurry was...

Embodiment 2

[0013] Example 2: Taking nano-titania carrier loaded with noble metal catalytic powder as an example, a porous honeycomb ceramic carrier catalyst module assembly was manufactured. Pour the small balls that come with the ball mill into the ball milling jar, add 1.5L of deionized water into the ball milling jar, the water surface must exceed the highest surface of the balls, add 500g of catalyst powder into the ball milling jar for ball milling, the ball milling time is 30 minutes, pour Take out the mixed solution, and rinse the ball with 500ml of deionized water. Use 8g of one or several aluminosilicates of silica sol, aluminum sol, sodium silicate, sodium aluminate, potassium silicate, and potassium aluminate and one of sodium carbonate, potassium carbonate, sodium hydroxide, and potassium hydroxide 16g of one or more basic compounds and 12g of hydroxyethyl methylcellulose are compounded to obtain a composite binder with a concentration of 10%. The catalyst powder slurry was ...

Embodiment 3

[0014] Example 3: When the catalyst powder formed by carrying a noble metal catalyst on a nano-alumina carrier is heated to 200°C, it can catalyze and oxidize benzene series pollutants in the air very well, and has a good application prospect. Choose 0.2-0.5mm stainless steel metal heating belt, use corrugated bending machine and other equipment to bend the heating belt into corrugated nature, the peak height is 5-8mm, and wind the corrugated belt into a disc shape or square shape, so that the small volume Obtain a large specific surface area. Soak the metal corrugated heating plate in 0.2mol / L H2SO4 solution for 1 hour, take it out, wash it with water for 3 times, and dry it in an oven at 120°C. The nano-alumina-supported noble metal catalyst powder is dissolved in water to prepare a suspension with a concentration of about 20%. Add 5wt% composite binder, and ball mill at 200r / min for 2h. By impregnation method, the ball-milled catalyst was carried on a metal corrugated hea...

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PUM

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Abstract

The invention provides a coating method of nanopowder coating with high strength. The coating method comprises the following steps: first, nano-catalyst powder, fluorinated acrylate monomers, unsaturated polyester resins, pigments and deionized water are mixed and subjected to ball grinding, and a nano-catalyst powder slurry is prepared; second, 0.5-5% of silicate, 1-3% of alkali compounds and 2-4% of hydroxyethyl methyl cellulose are mixed and compounded, and a binder slurry is prepared; third, the prepared nano-catalyst powder slurry is stirred at a high speed, the prepared binder slurry is dropwisely added slowly during the stirring process and a nano-catalyst compound slurry is prepared; fourth, porous carriers are dried and soaked in the nano-catalyst compound slurry, afterwards the porous carriers are taken out and blowed, the blowing interval time of every time is 5-10s, and the soaking time of every time is 3-5s, the above operations are repeatedly for 8-10 times until the weight of the porous carriers after being soaked in the nano-catalyst slurry is increased by 8-14% than that of the porous carriers before being soaked, and conventional drying and calcinations are carried out. The coating method is advantageous in that, nanocatalysts can be coated on porous carriers with large superficial area uniformly and firmly and have no influences on catalytic oxidation performance; the primary transformation rate of formaldehyde can reach 80-100%.

Description

technical field [0001] The invention relates to a method for coating a catalyst, in particular to a method for coating a high-strength nanometer powder coating. Background technique [0002] Formaldehyde is extremely harmful to the human body, causing respiratory diseases and possibly cancer. my country's "(Indoor Air Quality Standard)" GB / T18883-2002 clearly stipulates that the indoor formaldehyde concentration is less than 0.1mg / m3, and more than 60% of newly renovated houses exceed the standard, and the formaldehyde pollution situation is very serious. Catalytic oxidation of formaldehyde at room temperature is an effective technology for purifying and oxidizing formaldehyde. Chinese patents ZL200410102837.3, ZL200410047973.7, ZL200610011663.9, ZL200610011398.4 all mention the preparation method of this nano powder catalyst. However, in practical application, it is necessary to coat the catalyst powder on the surface of a porous carrier with a large surface area to form ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02B01J23/38
Inventor 蔡建林杨志
Owner JINHU COLOR POWDER COATING
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