Manganese dioxide composite material and preparation method and application thereof

A composite material, manganese dioxide technology, applied in the preparation of carbon-based compounds, organic compounds, carbonyl compounds by oxidation, etc., can solve the problem of ideal methanol conversion and formaldehyde yield, high catalyst consumption, and high production costs and other problems, to achieve the effect of promoting the conversion rate of methanol and the yield of formaldehyde, good adsorption, and improved adsorption

Active Publication Date: 2021-01-08
ANHUI UNIVERSITY
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, in order to obtain higher aldehyde, the catalyst consumption that ketone yield needs is very high, for example when producing benzaldehyde, the yield of γ crystal form manganese dioxide just can reach 100% when 8 equivalents, this catalyst consumption is quite astonishing and greatly increases the cos

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
  • Manganese dioxide composite material and preparation method and application thereof
  • Manganese dioxide composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of preparation method of manganese dioxide composite material, concrete steps are as follows:

[0041] (1) 0.5g manganese dihydrogen phosphate and 0.2g cerium trichloride are dissolved in 10g water earlier to obtain an aqueous solution;

[0042] (2) Then add 1 g of melamine to 8 g of acid solution with pH=4.5, stir and hydrolyze to obtain a hydrolyzate;

[0043] (3) Then the aqueous solution, the hydrolyzate and the halloysite suspension are mixed and reacted, and post-treated to obtain the precursor;

[0044] (4) Finally, the precursor is calcined to obtain the manganese dioxide composite material;

[0045] Wherein, the halloysite suspension is obtained by first depositing 0.5 g of nanometer zirconia on the surface of 8 g of halloysite, and then uniformly dispersing it with 70 g of 0.5 mol / L sodium hydroxide solution.

[0046] Wherein, in step (2), the acid solution is hydrochloric acid.

[0047] In step (2), the process condition of stirring hydrolysis is: s...

Embodiment 2

[0060] A kind of preparation method of manganese dioxide composite material, concrete steps are as follows:

[0061] (1) 0.8g manganese dihydrogen phosphate and 0.1g cerium trichloride are dissolved in 10g water earlier to obtain an aqueous solution;

[0062] (2) Then add 1.5 g of melamine to 9 g of acid solution with pH=3.5, stir and hydrolyze to obtain a hydrolyzate;

[0063] (3) Then the aqueous solution, the hydrolyzate and the halloysite suspension are mixed and reacted, and post-treated to obtain the precursor;

[0064] (4) Finally, the precursor is calcined to obtain the manganese dioxide composite material;

[0065] Wherein, the halloysite suspension is obtained by first depositing 0.8 g of nanometer zirconia on the surface of 5 g of halloysite, and then uniformly dispersing it with 60 g of 1mol / L sodium hydroxide solution.

[0066] In step (2), the acid solution is sulfuric acid.

[0067] In step (2), the process condition of stirring hydrolysis is: stirring at 35°...

Embodiment 3

[0080] A kind of preparation method of manganese dioxide composite material, concrete steps are as follows:

[0081] (1) Dissolve 0.7g manganese dihydrogen phosphate and 0.15g cerium trichloride in 10g water earlier to obtain an aqueous solution;

[0082] (2) Then add 1.2 g of melamine to 8.5 g of acid solution with pH=4, stir and hydrolyze to obtain a hydrolyzate;

[0083] (3) Then the aqueous solution, the hydrolyzate and the halloysite suspension are mixed and reacted, and post-treated to obtain the precursor;

[0084] (4) Finally, the precursor is calcined to obtain the manganese dioxide composite material;

[0085] Wherein, the halloysite suspension is obtained by first depositing 0.6 g of nanometer zirconia on the surface of 7 g of halloysite, and then uniformly dispersing it with 65 g of 0.8 mol / L sodium hydroxide solution.

[0086] In step (2), the acid solution is hydrochloric acid, sulfuric acid or nitric acid solution.

[0087] In step (2), the process condition ...

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a manganese dioxide composite material as well as a preparation method and application thereof. The manganese dioxide composite material is prepared by taking manganese dihydrogen phosphate, cerium trichloride, melamine, halloysite and the like as raw materials. The manganese dioxide composite material can be used for a reaction for preparing formaldehyde through methanol oxidation, and the methanol conversion rate and the formaldehyde yield are greatly improved. Preparation of formaldehyde by methanol oxidation belongs to dehydrooxidation, so that the key of promoting the reaction is how to promote hydrogen removal. In the preparation process, rich pores are formed in a precursor calcining process, so that the composite material has a good adsorption effect on methanol, good contact between the composite material and reactant methanol is promoted, and a good foundation is provided for subsequent catalytic reaction.

Description

technical field [0001] The invention relates to the technical field, in particular to a manganese dioxide composite material, a preparation method and an application. Background technique [0002] Formaldehyde is an important organic chemical raw material, one of the important derivatives of methanol, and a large-scale production and consumption of chemical products. The usual preparation method is: at 600-700°C, let methanol, air and water pass through catalysts such as silver, copper or alum pentoxide to directly oxidize formaldehyde, and absorb it with water to obtain formaldehyde solution. High-temperature reactions will undoubtedly bring huge energy and cost pressures. In order to reduce the reaction temperature, researchers have been working on the research of catalysts. [0003] Patent application CN108816241A discloses an iron-molybdenum method for methanol oxidation to formaldehyde catalyst, which uses molybdenum salt and iron salt as raw materials, and is first pr...

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
IPC IPC(8): B01J27/24B01J35/10C07C45/29C07C47/052
CPCB01J27/24B01J35/1004C07C45/298C07C47/04
Inventor 陈京帅张永猛毛昌杰吴明元
Owner ANHUI UNIVERSITY
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