Method for preparing formaldehyde and ozone removal catalyst at room temperature

A technology of catalyst and oxidant, applied in the field of preparation of catalyst MnO2, which can solve the problems of high price and limitation

Inactive Publication Date: 2014-01-15
罗平
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent US 5585083 invented a method for Pt / SnO2 catalyst to remove formaldehyde in the air, but its application is limited due to the high price of noble metal Pt in the catalyst
Chinese patent CN1698932A uses a gold-loaded rare earth oxide or rare earth composite oxide catalyst, which can achieve better results at a temperature of 80-100 ° C, but requires heat energy and precious metals to limit its application.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing formaldehyde and ozone removal catalyst at room temperature
  • Method for preparing formaldehyde and ozone removal catalyst at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1000 g of water to a 5 L glass, add manganese acetate (294 g) and stir to dissolve it. Add 2000g of water to another 5L glass, add potassium permanganate (126g) and stir to dissolve it. Use a dropping funnel to add the potassium permanganate solution dropwise to the manganese acetate solution being stirred, and control the dropping rate to 300g / min. After 15 minutes of dropping, control the dropping rate to 450g / min until the dropping is completed. After continuing to stir for 2h, stop stirring, and age for 8h. Filter the obtained precipitate, wash it with deionized water three times, and suction filter to obtain the precipitate, dry it at 105°C, and roast it at 200°C for 2 hours to obtain the MnO2 catalyst.

[0019] The BET specific surface area of ​​the MnO2 catalyst is 180m 2 / g.

[0020] The performance test of the catalyst for removing formaldehyde was carried out in a continuous-flow fixed-bed reactor. Load 1g of the catalyst in a glass tube, at room tempe...

Embodiment 2

[0023] Add 1000 g of water to a 5 L glass, add manganese acetate (294 g) and stir to dissolve it. Add 2000g of water to another 5L glass, add potassium permanganate (126g) and stir to dissolve it. Use a dropping funnel to add the potassium permanganate solution dropwise to the manganese acetate solution being stirred, and control the dropping rate to 300 g / min until the dropping is completed. After continuing to stir for 2h, stop stirring, and age for 8h. Filter the obtained precipitate, wash it with deionized water three times, and suction filter to obtain the precipitate, dry it at 105°C, and roast it at 200°C for 2 hours to obtain the MnO2 catalyst.

[0024] The BET specific surface area of ​​the MnO2 catalyst is 350m 2 / g.

[0025] The detection method of the removal efficiency of formaldehyde and ozone is the same as that in Example 1, the removal efficiency of formaldehyde is 96%, and the removal efficiency of ozone is 99%.

Embodiment 3

[0027] The preparation method of the catalyst in this embodiment is basically the same as that in Embodiment 1, the difference is that in this embodiment, the soluble manganese salt is replaced with one of manganese nitrate, manganese sulfate or manganese chloride, and the results are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing a formaldehyde and ozone removal catalyst MnO2 at room temperature. The method is characterized by comprising the following steps: 1, preparing a 0.1 to 2mol / L solution from a water-soluble manganese salt; 2, preparing a 0.05 to 1mol / L solution from an oxidizing agent; 3, continuously dropwise adding the solution obtained by the step 2 into the solution obtained by the step 1 at a constant speed; 4, aging produced MnO2 suspension for 1 to 1 hour; 5, washing precipitates obtained by aging for 1 to 5 times by using water, drying the precipitates at 105 DEG C after suction filtration, and roasting the precipitates at 200 to 300 DEG C to obtain the catalyst MnO2. The catalyst MnO2 prepared by the method can be used for simultaneously decomposing harmful gases formaldehyde and ozone in contaminated air into harmless H2O and CO2 under a room temperature condition, and has the advantages of no harmful byproducts and high formaldehyde and ozone removal efficiency.

Description

technical field [0001] The invention relates to a method for preparing a catalyst MnO2 for removing formaldehyde and ozone at room temperature. Background technique [0002] The problem of formaldehyde pollution in indoor and closed systems caused by decoration and decoration has aroused great concern from all walks of life. Formaldehyde is a highly toxic substance. Studies have shown that short-term exposure to formaldehyde can irritate the eyes, nasal cavity and respiratory tract and cause allergic reactions. Long-term exposure can increase the possibility of cancer. Formaldehyde has been identified as carcinogenic and teratogenic substance by the World Health Organization. Office ozone pollution caused by copiers and other office equipment has also attracted more and more attention. Low concentration of ozone can be disinfected, but excessive ozone is an invisible killer. Ozone strongly stimulates the human respiratory tract, causing sore throat, chest tightness and co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C01G45/02B01D53/86B01D53/66B01D53/72
CPCY02A50/20
Inventor 罗平
Owner 罗平
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap