Air filter material containing active carbon and production method thereof

A technology for air filter materials and production methods, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, and can solve the problems of inability to absorb harmful gases, inability to remove acidic or alkaline or compound volatile harmful gases, and ineffective Remove acidic or alkaline or complex volatile harmful gases, etc., to achieve high removal rate and good removal efficiency

Inactive Publication Date: 2014-06-18
TORAY FIBER RES INST(CHINA) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For example, Chinese published patent CN101332385 discloses a filter material with activated carbon particles between two layers of non-woven fabrics. Although the filter material can keep intercepting solid particles such as dust, it can only remove the most common organic gases in the air. , unable to remove acidic or alkaline or compound volatile harmful gases
[0004] Another example is that Japanese Patent Application No. 2007-38091 discloses an air filter material, which is a filter

Method used

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  • Air filter material containing active carbon and production method thereof
  • Air filter material containing active carbon and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Sulfuric acid was sprayed onto activated carbon particles by spraying, and then dried at a temperature of 80-90°C to obtain activated carbon particles treated with sulfuric acid. The average particle size of the activated carbon particles was 150μm and the ratio The surface area is 1000~2000m 2 / g;

[0029] (2) The activated carbon particles treated with sulfuric acid are directly mixed with hot melt adhesive powder and sprinkled on a layer of non-woven fabric, and then combined with another layer of non-woven fabric by heat treatment at a temperature of 130°C for 2 minutes , The final formation contains 60g / m 2 Activated carbon air filter material, the removal efficiency of the air filter material to ammonia gas is 92%, NO 2 The removal efficiency of toluene is 5%, and the removal efficiency of toluene is 75%.

Embodiment 2

[0031] (1) The activated carbon particles are immersed in phosphoric acid, and then dried at a temperature of 80-90°C to prepare activated carbon particles treated with phosphoric acid. The average particle size of the activated carbon particles is 200μm and the specific surface area is 1000-2000m. 2 / g;

[0032] (2) The activated carbon particles treated with phosphoric acid and the activated carbon particles not treated with acid-base treatment are blended at a weight ratio of 70:30, and then mixed with hot melt adhesive powder and sprinkled on a layer of non-woven fabric. Then through the heat treatment at a temperature of 120°C and a time of 3 minutes, it is combined with another layer of non-woven fabric to form a final weight of 80g / m 2 Activated carbon air filter material, the removal efficiency of the air filter material to ammonia gas is 95%, NO 2 The removal efficiency of toluene is 8%, and the removal efficiency of toluene is 90%.

Embodiment 3

[0034] (1) Sodium hydroxide is sprayed onto the activated carbon particles by spraying, and then dried at a temperature of 80-100 ℃ to obtain activated carbon particles treated with sodium hydroxide. The average particle size of the activated carbon particles 200μm, specific surface area is 1500~2500m 2 / g;

[0035] (2) The activated carbon particles treated with sodium hydroxide are directly mixed with hot melt adhesive powder and then sprinkled on a layer of non-woven fabric, and then heat-treated with another layer of non-woven fabric at a temperature of 130°C for 2 minutes Compound processing, the final formation is 60g / m 2 Activated carbon air filter material, the removal efficiency of the air filter material to ammonia gas is 8%, NO 2 The removal efficiency of toluene is 88%, and the removal efficiency of toluene is 82%.

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Abstract

The invention discloses an air filter material containing active carbon and a production method thereof. The filter material is at least composed of an upper non-woven fabric layer, a lower non-woven fabric layer and an intermediate sandwiched active carbon layer, wherein the active carbon layer contains more than 5 wt% of active carbon particles treated by acidic and/or alkali substances. The air filter material containing active carbon in the invention has a high removal rate in removal of acidic and alkaline gas and composite gas thereof, maintains good removal efficiency in removal of organic gas at the same time and can be used in filtration fields like automobiles, household purifiers, clean rooms, etc.

Description

Technical field [0001] The invention relates to an air filter material containing activated carbon and a production method thereof. Background technique [0002] With the densification of buildings and the rapid increase in the number of cars, the emission of complex volatile harmful gases in the air has increased. At present, most of the active carbon non-woven filter materials produced in general industry have a relatively low adsorption rate, which can only remove organic gases, such as toluene, etc., and cannot effectively adsorb acidic or alkaline or complex volatile harmful gases, or partially The adsorbed odor still stays in the activated carbon cavity and cannot be removed even if it will escape again after a period of time. Therefore, the removal rate of common filter materials for odor in the air is not high. [0003] For example, Chinese Patent CN101332385 discloses a filter material with activated carbon particles sandwiched between two layers of non-woven fabrics. Al...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01D53/02B01D53/81
Inventor 马燕男
Owner TORAY FIBER RES INST(CHINA) CO LTD
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