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Molecular sieve based catalyst capable of degrading formaldehyde at normal temperature as well as preparation method and application of molecular sieve

A molecular sieve and catalyst technology, which is applied in the field of molecular sieve catalyst for degrading and removing formaldehyde at room temperature and its preparation field, can solve the problem of inability to reduce the formaldehyde concentration to the national standard, etc., and achieve the effect of simple steps and less loaded precious metals

Inactive Publication Date: 2019-01-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many ways to remove formaldehyde on the market, but most of them cannot reduce the concentration of formaldehyde to the national standard

Method used

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  • Molecular sieve based catalyst capable of degrading formaldehyde at normal temperature as well as preparation method and application of molecular sieve
  • Molecular sieve based catalyst capable of degrading formaldehyde at normal temperature as well as preparation method and application of molecular sieve
  • Molecular sieve based catalyst capable of degrading formaldehyde at normal temperature as well as preparation method and application of molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 2.951g NaAlO 2 (M=81.97) and 2.355 g of NaOH (M=40) were dissolved in 22 mL of deionized water, and magnetically stirred at 300 rpm at room temperature to obtain liquid A. 1.5g of Fumed SiO 2 (M=60.084) was added to the above liquid A, and magnetically stirred at 300 rpm at room temperature to prepare liquid B. The obtained liquid B was sealed in a polytetrafluoroethylene plastic bottle, and stirred at room temperature and 800 rpm for 10 min to obtain liquid C. The prepared liquid C was stirred in an oil bath at 400 rpm and 60° C. for 3 hours. Platinum nitrate solution (0.4g platinum nitrate, 10ml water) was prepared, 10mL was added dropwise to the above-prepared solution, and then the obtained mixture was stirred uniformly at 400rpm and 60°C for 1 hour to form a gel. Then the gel was heated to 100° C. and crystallized at 100° C. and 400 rpm for 16 hours. The crystallized solution was filtered (Buchner funnel), washed with deionized water until neutral. Then dry in...

Embodiment 2

[0036] 2.951g NaAlO 2 (M=81.97) and 2.355 g of NaOH (M=40) were dissolved in 22 mL of deionized water, and magnetically stirred at 300 rpm at room temperature to obtain liquid A. 1.5g of Fumed SiO 2 (M=60.084) was added to the above liquid A, and magnetically stirred at 300 rpm at room temperature to prepare liquid B. The obtained liquid B was sealed in a polytetrafluoroethylene plastic bottle, and stirred at room temperature and 800 rpm for 10 min to obtain liquid C. The prepared liquid C was stirred in an oil bath at 400 rpm and 60° C. for 3 hours. Platinum nitrate solution (0.2g platinum nitrate, 10ml water) was prepared, and 10mL was added dropwise to the above-prepared solution, and then the obtained mixture was stirred evenly at 400rpm and 60°C for 1 hour to form a gel. Then the gel was heated to 100° C. and crystallized at 100° C. and 400 rpm for 16 hours. The crystallized solution was filtered (Buchner funnel), washed with deionized water until neutral. Then dry i...

Embodiment 3

[0038] 2.951g NaAlO 2 (M=81.97) and 2.355 g of NaOH (M=40) were dissolved in 22 mL of deionized water (magnetic stirring) to obtain liquid A. 1.5g of Fumed SiO 2 (M=60.084) was added to the above liquid A (magnetic stirring) to prepare liquid B. The obtained liquid B was sealed in a polytetrafluoroethylene plastic bottle, and stirred at room temperature and 700 rpm for 15 min to obtain liquid C. The prepared liquid C was stirred in an oil bath at 400 rpm and 70° C. for 3 hours. Platinum nitrate solution (0.4g platinum nitrate, 10ml water) was prepared, 10mL was added dropwise to the above-prepared solution, and then the obtained mixture was stirred uniformly at 400rpm and 60°C for 1 hour to form a gel. Then the gel was heated to 90° C. and crystallized at 90° C. and 400 rpm for 18 hours. The crystallized solution was filtered (Buchner funnel), washed with deionized water until neutral. Then it was dried in an oven at 100° C. for 10 hours. The prepared molecular sieve was...

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Abstract

The invention belongs to the technical field of catalysts and discloses a molecular sieve based catalyst capable of degrading formaldehyde at a normal temperature as well as a preparation method and application of the molecular sieve. The catalyst is synthesized from the following raw materials: NaAlO2, NaOH, Fumed SiO2 and a platinum nitrate solution. The molecular sieve is synthesized by simplesteps, is loaded with less precious metals, is capable of effectively removing formaldehyde, and the removed formaldehyde can be directly converted into non-toxic ingredients; and the molecular sieveis effective for a long time.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a molecular sieve catalyst for degrading and removing formaldehyde at room temperature, a preparation method and application thereof. Background technique [0002] Newly renovated houses are filled with a large amount of formaldehyde. Inhaling formaldehyde for a long time is very harmful to the human body and can lead to various diseases. Therefore, various countries have very strict standards for indoor formaldehyde. China's "Indoor Air Quality Standards" stipulates that the maximum allowable concentration of formaldehyde in indoor air hygiene standards is 0.1mg / m 3 . There are many ways to remove formaldehyde on the market, but most of them cannot reduce the concentration of formaldehyde to the national standard. Contents of the invention [0003] In order to overcome the shortcomings and deficiencies in the prior art, the primary purpose of the present inven...

Claims

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Application Information

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IPC IPC(8): B01J29/068B01J37/08B01J37/03C01B39/04B01D53/86B01D53/72
CPCB01D53/8668B01J29/068B01J37/0018B01J37/036C01B39/04
Inventor 穆文庆刘宝玉黄嘉晋方岩雄
Owner GUANGDONG UNIV OF TECH
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