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Photocatalytic reagent and application on aluminized paper

A photocatalytic reaction and photocatalytic reactor technology, which is applied in the fields of physical treatment of paper, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of small application range and few types of volatile substances.

Inactive Publication Date: 2015-04-29
湖北盟科纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The range of application of this technology is relatively small, and there are fewer types of volatile substances to deal with

Method used

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  • Photocatalytic reagent and application on aluminized paper
  • Photocatalytic reagent and application on aluminized paper
  • Photocatalytic reagent and application on aluminized paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for producing aluminum-coated paper with qualified formaldehyde and / or TVOC content, comprising the following steps, 1) detection result of aluminum-coated paper to be treated: formaldehyde exceeds the standard, the standard is 20.00 mg / kg, the actual content is 35.00 mg / kg, and benzene exceeds the standard , the standard is 0.002mg / ㎡, the actual content is 0.006mg / ㎡, the aluminized paper enters the photocatalytic reactor, the running speed is 100m / min, 2) the hot air is turned on, the temperature reaches 120-130℃, the exhaust rate is greater than 30%, formaldehyde and TVOC substances are volatilized from the aluminum-coated paper, 3) two UV lamps are fully turned on, the mixed gas containing formaldehyde and TVOC is mixed with the nano-La modified TiO sprayed on the rotating rod 2 Space contact (the aforementioned nano-La modified TiO 2 Mix with soluble starch solution at a mass ratio of 1:20), react under the acceleration of ultraviolet light with a wavelengt...

Embodiment 2

[0030] The steps are the same as in Example 1, and the photocatalytic reagent is TiO2 modified by Bi. Experiments have found that the degradation rate of formaldehyde reaches 88.5%, and the degradation rate of benzene reaches 73.2%, which meets the limit of volatile organic compounds in cigarette sticks and box wrapping paper. "Provisions.

Embodiment 3

[0032] The steps are the same as in Example 1, and the photocatalytic reagent is Nb-modified TiO2. Experiments have found that the degradation rate of formaldehyde reaches 92.3%, and the degradation rate of benzene reaches 76.6%, which meets the limit of volatile organic compounds in cigarette rods and box wrapping paper. "Provisions.

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Abstract

The invention provides a photocatalytic reagent which has the chemical composition of any one of TiO2, La-doped TiO2, Nb-doped TiO2 and Bi-doped TiO2. The invention also discloses equipment applying the photocatalytic reagent on aluminized paper. A waste gas outlet is formed in a photocatalytic reactor; ultraviolet lamp tubes are arranged on the inner side wall of the photocatalytic reactor on two sides of the waste gas outlet; a rotatable rod is arranged at a position, which is 3-8cm away from the ultraviolet lamp tubes; multiple hot air inlets are formed in the bottom of the photocatalytic reactor; and aluminized paper belt roller shafts are arranged on two sides of the photocatalytic reactor. The experiment proves that the degradation rate of formaldehyde and TVOC is increased along with the prolonged illumination time, the concentration of the formaldehyde is reduced along with the prolonged illumination time, the degradation rate of the formaldehyde and TVOC is not influenced by the coating thickness of the photocatalytic reagent, the photocatalytic reagent has repeatability on degradation, and the degradation rate of the photocatalytic reagent on the formaldehyde is not less than 85 percent.

Description

technical field [0001] The present invention relates to a kind of TiO 2 and metal element-modified titanium dioxide photocatalytic reagent, which is applied to aluminized paper, and the invention also relates to equipment for applying the photocatalytic reagent to aluminized paper. Background technique [0002] At present, the technologies for dealing with formaldehyde and TVOC of aluminized paper mainly include: [0003] 1. Improvement of hot air circulation. By transforming the exhaust and air intake of the equipment, a part of the hot air exhausted can be recycled again, and the heat energy can be used efficiently. This technology is widely used, but the energy consumption is relatively large, and it cannot meet the requirements for products with high requirements and complex materials. [0004] 2. Adjustment of heating method. In the preheating zone of the equipment and the first oven, the ordinary heating tube is replaced by an infrared electric heating tube. The in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/20B01J23/18B01D53/00B01D53/86B01D53/72D21H25/04
Inventor 黄述宝曹爱民王爱武
Owner 湖北盟科纸业有限公司
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