Modified activated carbon for removing formaldehyde and preparation method of modified activated carbon

A technology of activated carbon and modification, applied in the field of activated carbon, can solve the problems of unstable formaldehyde, loss of function of activated carbon, weakened formaldehyde adsorption capacity, etc., and achieve the effect of avoiding secondary pollution and periodic sun exposure

Inactive Publication Date: 2017-09-19
HENAN XICHAO IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used method for removing formaldehyde is activated carbon adsorption to remove formaldehyde, but with the adsorption of formaldehyde, the adsorption capacity of the activated carbon gaps for formaldehyde is weakened until the formaldehyde fills the entire activated carbon gap, and the activated carbon loses its effect. At the same time, the adsorbed Technical problem that formaldehyde is unstable and easily released into the air again

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 5 parts of ultrafine titanium dioxide, 3 parts of nano-silicon dioxide, 4 parts of phenol, and 0.5 parts of sodium polyacrylate in an appropriate amount of water at a temperature of 60°C. After stirring for 5 minutes, add 100 parts of coal-based carbon and 10 parts of asphalt, and then Soak for 3 hours, then dry at 80 for 1 hour, take out the crude sample; air-dry the crude sample; then pass the air-dried crude sample through a 90-mesh sieve to obtain the product.

[0025] At present, the maximum adsorption capacity of activated carbon on the market is mostly 900mg / g, and the adsorption capacity is weakened with the adsorption of formaldehyde. Under the condition of room temperature and formaldehyde concentration of 5mg / m^3, the average adsorption rate of activated carbon is 0.0104 mg / g.s, and the service life of activated carbon varies with the concentration of indoor formaldehyde. Generally speaking, at high concentrations of formaldehyde, even after repeated ...

Embodiment 2

[0027] Dissolve 10 parts of ultrafine titanium dioxide, 5 parts of nano-silicon dioxide, 6 parts of phenol, and 1 part of sodium polyacrylate in an appropriate amount of water at a temperature of 80°C. After stirring for 5 minutes, add 100 parts of coal-based carbon and 20 parts of asphalt, and then Soak for 4 hours, then dry at 100°C for 2 hours, take out the crude sample; air-dry the crude sample; then pass the air-dried crude sample through a 90-mesh sieve to obtain the product.

[0028] At present, the maximum adsorption capacity of activated carbon on the market is mostly 900mg / g, and the adsorption capacity is weakened with the adsorption of formaldehyde. Under the condition of room temperature and formaldehyde concentration of 5mg / m^3, the average adsorption rate of activated carbon is 0.0104 mg / g.s, and the service life of activated carbon varies with the concentration of indoor formaldehyde. Generally speaking, at high concentrations of formaldehyde, even after repeate...

Embodiment 3

[0030] Dissolve 8 parts of ultrafine titanium dioxide, 4 parts of nano-silicon dioxide, 5 parts of phenol, and 0.8 parts of sodium polyacrylate in an appropriate amount of water at a temperature of 70°C. After stirring for 5 minutes, add 100 parts of coal-based carbon and 15 parts of adhesive , followed by soaking for 3.5 hours, then drying at 90°C for 1.5 hours, taking out the crude sample; air-drying the crude sample; then passing the air-dried crude sample through a 90-mesh sieve to obtain the product.

[0031] At present, the maximum adsorption capacity of activated carbon on the market is mostly 900mg / g, and the adsorption capacity is weakened with the adsorption of formaldehyde. Under the condition of room temperature and formaldehyde concentration of 5mg / m^3, the average adsorption rate of activated carbon is 0.0104 mg / g.s, and the service life of activated carbon varies with the concentration of indoor formaldehyde. Generally speaking, at high concentrations of formalde...

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Abstract

The invention discloses modified activated carbon for removing formaldehyde and a preparation method of the modified activated carbon. According to the preparation method of the modified activated carbon, 5-10 parts of ultrafine particle titanium dioxide, 3-5 parts of nano silicon dioxide, 4-6 parts of a formaldehyde trapping agent and 0.5-1 part of a dispersant are added to water at the temperature of 60-80 DEG C and stirred for 5 min, 100 parts of activated carbon and 10-20 parts of a bonding agent are added, the obtained mixture is soaked for 3-4 hours and then dried at 80-100 DEG C for 1-2 hours, and a crude sample is taken out; the crude sample is air-dried; the air-dried crude sample is sieved with a 90-mesh sieve, and a product is obtained; a photocatalyst is supported on activated carbon and catalyzes and degrades formaldehyde on the activated carbon under the illumination condition, carbon dioxide and water are produced, secondary pollution of formaldehyde is avoided, the adsorption effect of the activated carbon is enhanced, and the life cycle of the activated carbon is prolonged.

Description

technical field [0001] The invention relates to the technical field of activated carbon, in particular to a formaldehyde-removing modified activated carbon and a preparation method thereof. Background technique [0002] Formaldehyde (HCHO) is a common indoor air pollution. It mainly comes from the wood-based panels of indoor furniture, adhesives with formaldehyde as the main raw material, and other various decorative materials that contain formaldehyde and emit to the outside world. Formaldehyde is a highly toxic substance and ranks second on the list of priority control of toxic chemicals in my country. In response to this situation, various technologies for controlling formaldehyde have emerged as the times require. At present, the most commonly used method for removing formaldehyde is activated carbon adsorption to remove formaldehyde, but with the adsorption of formaldehyde, the adsorption capacity of the activated carbon gaps for formaldehyde is weakened until the form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J21/06B01D53/86B01D53/72
CPCB01J20/20B01D53/02B01D53/8668B01D2257/708B01D2258/06B01J21/063
Inventor 张西峰胡箐张驰博赵彦超
Owner HENAN XICHAO IND CO LTD
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