Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing foamed silver catalyst based on supercritical carbon dioxide foaming technology

A carbon dioxide, supercritical technology, applied in the preparation of amino hydroxyl compounds, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. performance, difficulty in obtaining syntactic foam, etc., to achieve good catalytic stability, maintain catalytic stability, and achieve the best market promotion value.

Active Publication Date: 2020-05-08
SICHUAN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main disadvantage of the method disclosed above is that it is difficult to control the shape of the cells, and the size of the prepared cells is large and the distribution is uneven, so it is difficult to obtain PVA / AgNO with stable quality. 3 Composite foam, and then will affect the quality and catalytic performance of the silver foam that makes to a great extent; In addition, in order to make polyvinyl alcohol cross-linked and form gel network structure, include adding chemical cross-linking agent or developing in the above-mentioned technical scheme The technical content of the foaming agent, so the prepared silver foam inevitably has a certain amount of residue, which affects the quality of the catalyst and product performance

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 foamed silver catalyst based on supercritical carbon dioxide foaming technology
  • Method for preparing foamed silver catalyst based on supercritical carbon dioxide foaming technology
  • Method for preparing foamed silver catalyst based on supercritical carbon dioxide foaming technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The method for preparing foam silver catalyst based on supercritical carbon dioxide foaming technology, in parts by weight, comprises the following steps:

[0044] (1) Using 42 parts of silver nitrate (AgNO 3 ) and 100 parts of polyvinyl alcohol (PVA) were mixed and stirred for 60 hours. After the plasticization was complete, the mixed material obtained after plasticization was heated and melted, and the molding method was used to make it evenly mixed and shaped, and the prepared thickness was 2mm PVA / AgNO 3 Composite panels;

[0045] Wherein, the plasticizing system comprises the following components:

[0046] 60 parts of water,

[0047] 42 parts of silver nitrate;

[0048] (2) PVA / AgNO obtained in step (1) 3 Composite sheet prepared by supercritical carbon dioxide autoclave pressure foaming method to obtain PVA / AgNO 3 Composite foam material, wherein the process parameters of the supercritical carbon dioxide autoclave pressure foaming method are: the foaming pro...

Embodiment 2

[0053] The method for preparing foam silver catalyst based on supercritical carbon dioxide foaming technology, in parts by weight, comprises the following steps:

[0054] (1) Using 100 parts of silver nitrate (AgNO 3 ) and 100 parts of polyvinyl alcohol (PVA) were mixed and stirred for 72 hours. After the plasticization was complete, the mixed material obtained after plasticization was heated and melted, and the molding method was used to mix it evenly and shape it. The prepared thickness was 2mm PVA / AgNO 3 Composite panels;

[0055] Wherein, the plasticizing system comprises the following components:

[0056] 60 parts of water,

[0057] 100 parts of silver nitrate;

[0058] (2) PVA / AgNO obtained in step (1) 3 Composite sheet prepared by supercritical carbon dioxide autoclave pressure foaming method to obtain PVA / AgNO 3 Composite foam material, wherein the process parameters of the supercritical carbon dioxide autoclave pressure foaming method are: the foaming process pr...

Embodiment 3

[0064] The method for preparing foam silver catalyst based on supercritical carbon dioxide foaming technology, in parts by weight, comprises the following steps:

[0065] (1) Using 40 parts of silver nitrate (AgNO 3 ) and 100 parts of polyvinyl alcohol (PVA) were mixed and stirred for 48 hours. After the plasticization was complete, the mixed material obtained after plasticization was heated and melted, and the molding method was used to make it evenly mixed and shaped, and the prepared thickness was 1mm PVA / AgNO 3 Composite panels;

[0066] Wherein, the plasticizing system comprises the following components:

[0067] 40 parts of water,

[0068] 20 parts of ethylene glycol,

[0069] 40 parts of silver nitrate;

[0070] (2) PVA / AgNO obtained in step (1) 3 Composite sheet prepared by supercritical carbon dioxide autoclave pressure foaming method to obtain PVA / AgNO 3 Composite foam material, wherein the process parameters of the supercritical carbon dioxide autoclave pressur...

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
thicknessaaaaaaaaaa
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a foamed silver catalyst based on a supercritical carbon dioxide foaming technology. The method comprises the following steps: plasticizing and modifyingpolyvinyl alcohol, preparing a PVA / AgNO3 composite plate by adopting a mould pressing method, preparing a PVA / AgNO3 composite foam material by adopting a supercritical carbon dioxide kettle pressure foaming method, and performing in-situ solid-state reaction on the obtained composite foam material, thereby obtaining the foamed silver catalyst. According to the invention, process conditions are optimized and combined; the foam pore structure is optimized, so that the foamed silver catalyst with characteristics of good catalytic efficiency and certain mechanical strength is obtained after the in-situ solid phase reaction, the foam pore size distribution of the foamed silver catalyst prepared through the method is uniform, the product is pure, and the catalytic performance is significantly superior to that of the similar products on the market.

Description

technical field [0001] The invention belongs to the technical field of porous foamed metal catalysts, in particular to foamed silver catalysts, in particular to a method for preparing foamed silver catalysts based on supercritical carbon dioxide foaming technology. Background technique [0002] As the demand for metal lightweight materials has increased in recent years, the research on metal foams has become more and more extensive. Silver foam is a new type of functional material. Because it combines many characteristics of foam and metallic silver, it not only has the advantages of high porosity, low density, high specific surface area, but also has excellent antibacterial, electrical and thermal conductivity, etc. performance. Silver foam is widely used in the fields of catalysis, sensing, heat dissipation and heat storage, electromagnetic shielding, sound absorption and noise reduction, and antibacterial. Among them, the use of foamed silver as a catalyst has good prac...

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): B01J23/50B01J35/02C07C213/02C07C215/76B01J35/00
CPCB01J23/50B01J37/0018C07C213/02B01J35/40C07C215/76
Inventor 白时兵袁斌王萌杨双桥江霞
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com