Preparation method for formaldehyde adsorbent

A formaldehyde adsorption and molecular sieve technology, which is applied in the field of air purification, can solve the problems of small adsorption capacity of polar substances, failure of indoor air purification requirements, and ineffective formaldehyde adsorption effect, etc., and achieves the improvement of formaldehyde adsorption rate and adsorption rate, and saturated adsorption capacity Large, thorough adsorption effect

Inactive Publication Date: 2018-10-26
JIANGSU AIER ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, most of the purification technologies for formaldehyde pollution in the air use activated carbon as an adsorbent, which has a large specific surface area and strong adsorption capacity. However, since activated carbon is a non-polar adsorbent, it has a strong adsorption capacity for non-polar substances. The adsorption capacity of sexual substances is small, so the adsorption effect on formaldehyde is not obvious, and the indoor air cannot meet the purification requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 10g MOR molecular sieve with 20g manganese sulfate aqueous solution with a mass concentration of 5% evenly, place in a muffle furnace at 550°C for 2 hours, and cool naturally to room temperature to obtain MnO 2 -MOR. Then the above-prepared MnO 2 -MOR was placed in a 0.5M copper nitrate solution for ion exchange at room temperature for 2 hours to obtain a formaldehyde adsorbent.

[0019] Put the obtained formaldehyde adsorbent into the sample tube, shake it lightly, fill it until the thickness of the sample is 7cm, and control the concentration of formaldehyde to 0.8-1.2mg / m 3 , set the flow rate to 1.00L / min, and measure the saturated adsorption capacity of the formaldehyde adsorbent by the dynamic adsorption method. Add formaldehyde solution into a 1 liter vacuum box to control the formaldehyde concentration to 0.5mg / m 3 , add formaldehyde adsorbent, let it stand for 24h, and measure the formaldehyde removal rate of formaldehyde adsorbent by static adsorption m...

Embodiment 2

[0023] Mix 5g of MOR molecular sieve with 25g of manganese sulfate aqueous solution with a mass concentration of 8% evenly, place in a muffle furnace at 550°C for 2 hours, and cool naturally to room temperature to obtain MnO 2 -MOR. Then the above-prepared MnO 2 -MOR was placed in a 1M copper nitrate solution for ion exchange at room temperature for 2 hours to obtain a formaldehyde adsorbent.

[0024] The MOR molecular sieve preparation method is as follows: with SiO 2 、Al 2 o 3 , NaOH, H 2 O is the raw material, in parts by mole, SiO 2 for 18 parts, Al 2 o 3 is 1 part, NaOH is 18 parts, H 2 O is 225 parts; the above raw materials are put into a stirrer and stirred and mixed into a colloidal state, then continue to stir and age at room temperature for 10 hours, and then crystallize and react for 10 hours at a temperature of 170~180°C to obtain a reaction product; The reaction product was washed with water until the pH value was neutral, and then suction-filtered to o...

Embodiment 3

[0027] Mix 2g MOR molecular sieve with 16g manganese sulfate aqueous solution with a mass concentration of 10% evenly, place in a muffle furnace at 550°C for 2 hours, and cool naturally to room temperature to obtain MnO 2 -MOR. Then the above-prepared MnO 2 -MOR was placed in a 2M copper nitrate solution for ion exchange at room temperature for 2 hours to obtain a formaldehyde adsorbent.

[0028] The MOR molecular sieve preparation method is as follows: with SiO 2 、Al 2 o 3 , NaOH, H 2 O is the raw material, in parts by mole, SiO 2 for 15 parts, Al 2 o 3 is 1 part, NaOH is 10 parts, H 2 O is 100 parts; put the above raw materials into a stirrer and mix them into a colloid, then continue to stir and age at room temperature for 6 hours, and then crystallize and react for 15 hours at a temperature of 175°C to obtain a reaction product; the reaction product Wash with water until the pH value is neutral, and then filter with suction to obtain a solid product. The solid pr...

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Abstract

The invention relates to a preparation method for a formaldehyde adsorbent, and belongs to the technical field of the air purification. The preparation method comprises the following steps: uniformlymixing a MOR molecular sieve and manganese sulfate water solution, placing in a muffle furnace for roasting, naturally cooling to a room temperature, to obtain MnO2-MOR; placing the prepared MnO2-MORin copper nitrate and performing ion exchange, to obtain a product of the formaldehyde adsorbent. The preparation method is capable of enabling the MnO2 to be placed in pore channels of the MOR molecular sieve by using a method of directly roasting, and substituting sodium ions by copper ions through an ion exchange method, and enabling the copper ions to be placed in the pore channels of the molecular sieve, thereby improving a formaldehyde adsorption rate. Compared with the existing formaldehyde adsorbent, the adsorbent is stronger in formaldehyde adsorption, large in saturation adsorption quantity, complete in adsorption, and simple in preparation process, and secondary release cannot be generated.

Description

technical field [0001] The invention relates to a preparation method of a formaldehyde adsorbent, in particular to a preparation method of a formaldehyde adsorbent used indoors and in automobiles, and belongs to the technical field of air purification. Background technique [0002] Indoor environmental quality will directly affect human health. According to relevant statistics, nearly half of the world's people live in polluted indoor air. Indoor environmental pollution has caused 35.7% of respiratory diseases, 22% of chronic lung diseases, and 15% of tracheitis, bronchitis and lung cancer. According to the survey of relevant international organizations, there are harmful substances in the air in more than 30% of the newly built or reconstructed buildings in the world, which are harmful to people's health. Indoor air pollution has been listed as the five environmental factors that have the greatest impact on public health. One of them, formaldehyde is a typical pollutant. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30B01D53/02
CPCB01D53/02B01D2257/70B01J20/0237B01J20/18
Inventor 韩峰
Owner JIANGSU AIER ENVIRONMENTAL PROTECTION TECH CO LTD
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