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Preparation method for adsorptive catalyst for in situ degradation of formaldehyde

A catalyst and formaldehyde technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of low conversion rate of formaldehyde, easy deactivation of catalysts, and low conversion efficiency of formaldehyde

Inactive Publication Date: 2018-11-23
ANHUI LEJIN ENVIRONMENT TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

Catalytic oxidation technology mainly utilizes the oxygen in the air to decompose formaldehyde into carbon dioxide and water under the action of a catalyst. It does not require an external excitation light source and the product is clean. A cerium-doped nano-titanium dioxide / activated carbon for air purification disclosed in CN102658115A Fiber composite photocatalyst and preparation method thereof, CN102247842A discloses a high-efficiency catalyst for eliminating formaldehyde at room temperature, which can efficiently decompose low-concentration formaldehyde under normal temperature and humidity, but the photocatalyst has low conversion efficiency to formaldehyde and the catalyst is easily deactivated
[0004] To sum up, the existing formaldehyde degradation agents either use adsorption method or catalytic degradation method, so that indoor formaldehyde is not thorough enough, and the conversion rate of formaldehyde is low

Method used

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  • Preparation method for adsorptive catalyst for in situ degradation of formaldehyde

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preparation example Construction

[0013] The present invention also provides a preparation method of the adsorption catalyst for in-situ degradation of formaldehyde, comprising the following steps:

[0014] (1) Add a foaming agent to the nylon 66 emulsion and mix evenly, then electrospin to obtain nylon 66 fibers, and calcinate the nylon 66 fibers at 300-450°C for 2-4 hours to obtain porous carbon fibers;

[0015] (2) After mixing porous carbon fiber, attapulgite, silane coupling agent and organic titanate in a solvent, ultrasonication for 15-30 minutes, and then sealing reaction at 80-120°C for 3-6 hours, to obtain modified porous carbon fiber ;

[0016] (3) Ultrasonic disperse the modified porous carbon fiber in a solvent for 15-30 minutes, then add polydiallyldimethylammonium chloride, continue ultrasonication for 30-45 minutes, then add graphene oxide, and stir for 30-45 minutes to obtain Adsorption catalysts for in situ degradation of formaldehyde.

[0017] In the present invention, a foaming agent is f...

Embodiment 1

[0026] An adsorption catalyst for in-situ degradation of formaldehyde, made of the following materials in parts by weight: 10 parts by weight of attapulgite, 8 parts by weight of tetraethyl titanate, 3.5 parts by weight of silane coupling agent KH580, and 6 parts by weight of graphene oxide parts, 5 parts by weight of polydiallyldimethylammonium chloride, 3 parts by weight of sodium carbonate, 100 parts by weight of nylon 66 emulsion, and 50 parts by weight of water.

[0027] The preparation method of the adsorption catalyst of described in-situ degradation formaldehyde, comprises the following steps:

[0028] (1) Add sodium carbonate to nylon 66 emulsion and mix evenly, then obtain nylon 66 fiber by electrospinning. The pitch of the needles of the silk unit is 35cm, and the number of needles of the spinning unit is 90;

[0029] Calcining nylon 66 fibers at 350°C for 3 hours to obtain porous carbon fibers;

[0030] (2) After the attapulgite is ground evenly, pass through a 2...

Embodiment 2

[0034] An adsorption catalyst for in-situ degradation of formaldehyde, made of the following parts by weight: 12 parts by weight of attapulgite, 10 parts by weight of tetramethyl titanate, 3.2 parts by weight of silane coupling agent KH590, and 6 parts by weight of graphene oxide 6 parts by weight of polydiallyldimethylammonium chloride, 3 parts by weight of N,N'-dinitrosopentamethylenetetramine, 120 parts by weight of nylon 66 emulsion, and 50 parts by weight of ethanol.

[0035] (1) Add N,N'-dinitrosopentamethylenetetramine to nylon 66 emulsion and mix evenly, then electrospin to obtain nylon 66 fiber. The electrospinning process is: power supply voltage 50kV, spinning The temperature is 35°C, the relative humidity is 75%; the needle spacing of the multi-needle spinneret unit is 35cm, and the number of needleheads of the spinneret unit is 90;

[0036] Calcining nylon 66 fibers at 400°C for 2.5 hours to obtain porous carbon fibers;

[0037] (2) After the attapulgite is ground ...

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Abstract

The invention relates to the technical field of formaldehyde cleaning agent, in particular to a preparation method for adsorptive catalyst for the in situ degradation of formaldehyde. The preparationmethod for adsorptive catalyst for the in situ degradation of formaldehyde comprises the following steps: (1) adding foaming agent into nylon66 emulsion to be evenly mixed, then, carrying out electrostatic spinning to obtain nylon66 fibers, and calcining the nylon66 fibers to obtain porous carbon fibers; (2) carrying out thermal reaction on the porous carbon fibers, attapulgite, silane coupling agent and organic titanate in solvent to obtain modified porous carbon fiber; (3) after the modified porous carbon fiber is subjected to ultrasonic dispersion in the solvent, adding poly dimethyl diallyl ammonium chloride, then, adding graphene oxide, and stirring for 30-45 min to obtain the adsorptive catalyst for the in situ degradation of formaldehyde. According to the adsorptive catalyst for thein situ degradation of the formaldehyde, indoor formaldehyde can be subjected to adsorption and catalytic degradation, and indoor formaldehyde can be permanently and thoroughly purified.

Description

technical field [0001] The invention relates to the technical field of formaldehyde purifiers, in particular to a method for preparing an adsorption catalyst for in-situ degradation of formaldehyde. Background technique [0002] Formaldehyde is one of the main pollutants in volatile organic pollutants (VOCs), especially widely present in indoor environments. The harm of formaldehyde to the human body depends on its concentration. It irritates the mucous membrane of the eyes at low concentrations, stimulates the upper respiratory tract at slightly higher concentrations, and causes cough, chest tightness, headache and nausea. At higher concentrations, it can cause rhinitis, pharyngitis, emphysema, and lung cancer. even death. At present, it has been identified as a carcinogenic and teratogenic substance by the World Health Organization. The health problems caused by indoor environmental pollution caused by formaldehyde have increasingly become a new focus of public attention....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01D53/86B01D53/72B01J20/16B01J20/20B01J20/30B01D53/02
CPCB01J21/18B01D53/02B01D53/8671B01J20/165B01J20/20
Inventor 郭常青吴学军
Owner ANHUI LEJIN ENVIRONMENT TECH CO LTD
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