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

A kind of preparation method of eggshell type deoxidation catalyst

A deoxygenation catalyst, eggshell-type technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low utilization rate of catalyst active components, catalyst carrier roasting The problems of high temperature and low catalytic efficiency of catalyst can achieve the effect of improving strength, improving catalytic activity and improving utilization rate.

Active Publication Date: 2020-04-21
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome that the existing methods for preparing eggshell-type deoxidation catalysts will inevitably cause some precious metals to diffuse into the interior of the carrier, resulting in low utilization of catalyst active components, low catalytic efficiency of catalysts, and large consumption of precious metals. And the preparation process of the catalyst carrier has the disadvantage of high calcination temperature, and then provides a method for preparing an eggshell-type deoxidation catalyst. The eggshell-type deoxidation catalyst prepared by this method has a high loading of precious metals and can be highly dispersed on the surface of the carrier.

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
  • A kind of preparation method of eggshell type deoxidation catalyst
  • A kind of preparation method of eggshell type deoxidation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of the eggshell type deoxidation catalyst provided in this embodiment comprises the following steps:

[0033] (1) Preparation of shell composite carrier

[0034] Impregnation of α-Al with glue solution 2 o 3 α-Al 2 o 3 A rubber layer is formed on the outside of the spherical carrier, and 220-mesh TiO 2 The powder is evenly coated on the adhesive layer, then dried at 80°C for 2.5 hours, and then fired at 400°C for 3 hours to obtain a shell-layer composite carrier;

[0035] (2) Preparation of Precursor Solution of Precious Metal Active Components

[0036] Preparation molar concentration is the palladium nitrate aqueous solution of 0.01mol / L, then above-mentioned palladium nitrate aqueous solution is added in the glue solution, the mass ratio of described palladium nitrate aqueous solution and described glue solution is 1:8, obtains precious metal salt glue solution, then Add an aqueous solution of hydrazine hydrate with a mass concentration of 5...

Embodiment 2

[0041] The preparation method of the eggshell type deoxidation catalyst provided in this embodiment comprises the following steps:

[0042] (1) Preparation of shell composite carrier

[0043] Impregnation of δ-Al with glue solution 2 o 3 spherical support in δ-Al 2 o 3 A rubber layer is formed on the outside of the spherical carrier, and 210-mesh TiO 2 The powder is uniformly coated on the adhesive layer, then dried at 60°C for 3 hours, and then fired at 310°C for 4 hours to obtain a shell-layer composite carrier;

[0044] (2) Preparation of Precursor Solution of Precious Metal Active Components

[0045] Prepare a ruthenium chloride aqueous solution with a molar concentration of 0.02mol / L, then add the above-mentioned ruthenium chloride aqueous solution to the glue solution, and the mass ratio of the ruthenium chloride aqueous solution to the glue solution is 1:15 to obtain a noble metal salt glue solution, and then add a formaldehyde solution with a mass concentration o...

Embodiment 3

[0050] The preparation method of the eggshell type deoxidation catalyst provided in this embodiment comprises the following steps:

[0051] (1) Preparation of shell composite carrier

[0052] Impregnation of θ-Al with glue solution 2 o 3 Spherical support with θ-Al 2 o 3 A rubber layer is formed on the outside of the spherical carrier, and 250 mesh TiO 2 The powder is evenly coated on the adhesive layer, then dried at 110°C for 1 hour, and then fired at 500°C for 2 hours to obtain a shell-layer composite carrier;

[0053] (2) Preparation of Precursor Solution of Precious Metal Active Components

[0054] Prepare a rhodium chloride aqueous solution with a molar concentration of 0.001mol / L, then add the above-mentioned rhodium chloride aqueous solution to the glue solution, and the mass ratio of the rhodium chloride aqueous solution to the glue solution is 1:2 to obtain a precious metal salt glue solution, and then add an aqueous formic acid solution with a mass concentrati...

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

No PUM Login to View More

Abstract

The invention provides a preparation method of an eggshell-shaped deoxidization catalyst. The preparation method comprises the following steps: firstly, immersing or spraying a glue solution to a spherical carrier so as to form a glue layer on the outer part of the spherical carrier; then coating the glue layer with a porous material; drying and roasting to obtain a shell-layer compound carrier; adding a water solution of soluble noble metal salt into the glue solution to prepare a noble metal salt glue solution; then adding a reducing agent water solution into the noble metal salt glue solution to prepare a noble metal active component precursor solution; finally, immersing or spraying the precursor solution to the shell-layer compound carrier; drying and roasting to prepare the eggshell-shaped deoxidization catalyst. According to the preparation method provided by the invention, the precursor solution contains the sticky glue solution and can prevent noble metal active components from being dispersed into the carrier, so that noble metal is loaded on the surface of a shell layer of the carrier as much as possible, and furthermore, the utilization rate of the active components is improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of an eggshell-type deoxidation catalyst. Background technique [0002] The rapid development of electronics industry, semiconductor materials, modern chemical industry, metallurgy, instrumentation, aerospace and atomic energy and other industries requires more and more high-purity gases, such as high-purity hydrogen, chlorine, nitrogen and carbon dioxide, etc. The purification of these gases usually involves deoxidation process. At present, the methods of purifying and removing impurity oxygen from high-purity gas mainly adopt variable-valence oxide absorption method, carbon combustion consumption method and hydrogenation catalytic conversion method. Among them, the deoxidation catalyst commonly used in the variable price oxide absorption method is manganese oxide, copper oxide or silver oxide, etc., but the deoxidation amount of the above-men...

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 Patents(China)
IPC IPC(8): B01J23/44B01J23/46B01J23/42B01J37/02C01B21/04
CPCB01J23/42B01J23/44B01J23/462B01J23/464B01J35/008B01J37/0201B01J37/0207B01J37/0213B01J37/0215C01B21/0422
Inventor 李新王春艳成峻青
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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