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Adsorbent for separating formaldehyde from air

An adsorbent and formaldehyde technology, applied in the field of air purification, can solve the problems of secondary pollution, short service life, low adsorption rate of harmful substances, etc.

Inactive Publication Date: 2018-10-16
ANHUI LEJIN ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary air purifiers have a low adsorption rate of harmful substances, and the service life is short, which is easy to cause secondary pollution

Method used

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  • Adsorbent for separating formaldehyde from air
  • Adsorbent for separating formaldehyde from air

Examples

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preparation example Construction

[0008] The present invention also provides a method for preparing the adsorbent for separating formaldehyde from air, comprising the following steps:

[0009] (1) Annealing the straw at 200-600°C for 5-12 hours in an inert gas atmosphere to obtain porous activated carbon;

[0010] (2) After mixing diatomite and maleic anhydride in water evenly, microwave reaction for 30-60 minutes to obtain modified diatomite;

[0011] (3) Stir and mix organic titanate, tin salt and ammonium carbonate in a solvent, then add porous activated carbon, CH 3 NH 3 I, silane coupling agent and modified diatomaceous earth are ultrasonically dispersed for 20-60 minutes, followed by sealed thermal reaction at 100-160°C for 2-6 hours to obtain an adsorbent for separating formaldehyde from air.

[0012] Straw is rich in pore structure and has a wide range of raw materials. After calcination, it can produce porous activated carbon with high specific surface area and high adsorption.

[0013] In order to...

Embodiment 1

[0020] An adsorbent for separating formaldehyde from the air, made of the following materials in parts by weight: 75 parts by weight of diatomite, 50 parts by weight of wheat straw, 8 parts by weight of maleic anhydride, 10 parts by weight of ammonium acetate, titanic acid 16 parts by weight of tetraisobutyl ester, 0.4 parts by weight of tin chloride, CH 3 NH 3 5 parts by weight of I, 4 parts by weight of ammonium carbonate, 4 parts by weight of divinyltriaminopropyltrimethoxysilane, and 100 parts by weight of water.

[0021] The preparation method of the adsorbent for separating formaldehyde from air may further comprise the steps:

[0022] (1) Anneal wheat straw at 300°C for 8 hours in an argon atmosphere to obtain porous activated carbon;

[0023] (2) Anneal diatomaceous earth at 350°C for 2 hours; then mix it with maleic anhydride and ammonium acetate in water, and react with microwave for 60 minutes, the frequency of the microwave reaction is 1200KHZ, and the power is 6...

Embodiment 2

[0026] An adsorbent for separating formaldehyde from air, made of the following materials in parts by weight: 80 parts by weight of diatomite, 40 parts by weight of wheat straw, 10 parts by weight of maleic anhydride, 8 parts by weight of ammonium acetate, titanic acid 12 parts by weight of tetramethyl ester, 0.4 parts by weight of tin chloride, CH 3 NH 3 3.2 parts by weight of I, 4 parts by weight of ammonium carbonate, 4.5 parts by weight of ureapropyltrimethoxysilane, and 100 parts by weight of water.

[0027] The preparation method of the adsorbent for separating formaldehyde from air may further comprise the steps:

[0028] (1) Anneal wheat straw at 400°C for 6 hours in an argon atmosphere to obtain porous activated carbon;

[0029] (2) Anneal diatomaceous earth at 300-500°C for 1-3 hours; then mix it with maleic anhydride and ammonium acetate in water, and react with microwave for 30-60 minutes. The frequency of the microwave reaction is 1000-1800KHZ, and the power 50...

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Abstract

The invention relates to the technical field of air purification, specifically to an adsorbent for separating formaldehyde from air. The adsorbent for separating formaldehyde from air is prepared fromthe following substances in parts by weight: 50-100 parts of kieselguhr, 30-80 parts of straw, 5-15 parts of maleic anhydride, 5-15 parts of ammonium acetate, 6-24 parts of organic titanate, 0.2-1 part of a tin salt, 2-8 parts of CH3NH3I, 1-8 parts of ammonium carbonate, 3-5 parts of a silane coupling agent and 50-120 parts of a solvent. By adopting the adsorbent for separating the formaldehyde from the air, harmful gases in the air can be adsorbed, and in addition, the harmful gases are catalyzed from interior of the adsorbent for separating the formaldehyde from the air, so that functions that concentrations of the harmful gases are reduced and the air is purified are achieved, air safety is ensured, and a healthy living environment is provided for people.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to an adsorbent for separating formaldehyde from air. Background technique [0002] At present, air pollution, such as formaldehyde, volatile organic compounds VOC, PM2.5 particles, etc., has a serious impact on the atmospheric environment and human health, such as: stimulating human skin, respiratory tract, mutagenicity, carcinogenesis, etc. How to eliminate air pollution and purify the air has become a problem that people pay more and more attention to. The quality of indoor air is an important factor affecting human health and thoughts and emotions. At present, the air purification methods adopted at home and abroad mainly include air suction filtration method, covering method, oxidation method and so on. The suction filtration method requires large-scale mechanical equipment, which is difficult to implement in living rooms, carriages, toilets and other environments; t...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/14B01J20/30B01D53/86B01D53/72B01D53/02
CPCB01J20/20B01D53/02B01D53/8668B01D2255/20707B01D2255/802B01D2258/06B01J20/14B01J20/3078B01J20/3085B01J2220/4825
Inventor 郭常青吴学军
Owner ANHUI LEJIN ENVIRONMENT TECH CO LTD
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