High-strength refractory catalytic cleaning ceramic filter and its preparing process

A technology of high temperature resistant ceramics and catalytic purification, applied in chemical instruments and methods, filtration separation, separation methods, etc., can solve the problems of easy sintering, poor high temperature resistance, etc., to improve high temperature resistance, catalytic activity, and low temperature. The effect of oxidative activity

Inactive Publication Date: 2002-05-29
穆柏春 +2
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problems that traditional catalytic purification filters are easy to sinter and have poor high temperature resistance under high temp

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1.1. According to alumina: 50kg, zircon: 35kg, aluminum fluoride: 15kg, and then pulverized by ball milling, pulverized into powder with a particle size of 0.04-0.15 mm;

[0023] 1.2. Mix according to the ratio of powder: polyvinyl alcohol aqueous solution = 1:0.35, and mix into a preform;

[0024] 1.3. Immerse the polyurethane soft foam plastic blank into the preform and immerse it into a honeycomb porous ceramic support body;

[0025] 1.4. Put the dried support body into a furnace for sintering at a heating rate of 150°C / h, a sintering temperature of 1600°C, and a sintering time of 2 hours. After the furnace is cooled to room temperature, it becomes an autogenous mullite fiber reinforcement. Zirconium corundum-mullite ceramic matrix composite support;

[0026] 1.5, take AlCl 3 In the reactor, slowly add AlCl dropwise 3 20 times the mass of absolute ethanol frozen at -20°C, reflux in an ice-water bath at room temperature for 6 hours, add AlCl in batches at reflux at 90°C 3...

Embodiment 2

[0033] 2.1. According to alumina: 70kg, zircon: 20kg, aluminum fluoride: 10kg ingredients, and then pulverized by ball milling, crushed into powder with a particle size of 0.04-0.15 mm;

[0034] 2.2. Mix according to the ratio of powder: polyvinyl alcohol aqueous solution = 1:0.5, and mix into a preform;

[0035] 2.3. Use mold injection to mold the preform into a straight-through porous ceramic support body;

[0036] 2.4. Put the dried support body into a furnace for sintering at a heating rate of 200°C / h, a sintering temperature of 1600°C, and a sintering time of 4 hours. After the furnace is cooled to room temperature, it becomes an autogenous mullite fiber reinforced Zirconium corundum-mullite ceramic matrix composite support;

[0037] 2.5, take AlCl 3 In the reactor, slowly add AlCl dropwise 3 20 times the mass of absolute ethanol frozen at -20°C, reflux in an ice-water bath at room temperature for 7 hours, add AlCl in batches at reflux at 85°C 3 80 times the mass of absolute ...

Embodiment 3

[0044] 3.1. According to alumina: 60kg, zircon: 28kg, aluminum fluoride: 12kg, and then pulverized by ball milling, pulverized into powder with a particle size of 0.04-0.15 mm;

[0045] 3.2. Mix according to the ratio of powder: polyvinyl alcohol aqueous solution = 1:0.85, and mix into a preform;

[0046] 3.3. Immerse the polyurethane soft foam plastic blank into the preform and immerse it into a honeycomb porous ceramic support body;

[0047] 3.4. Put the dried support body into a furnace for sintering at a heating rate of 270°C / h, a sintering temperature of 1600°C, and a sintering time of 6 hours. After the furnace is cooled to room temperature, it becomes an autogenous mullite fiber reinforced Zirconium corundum-mullite ceramic matrix composite support;

[0048] 3.5, take AlCl 3 In the reactor, slowly add AlCl dropwise 3 20 times the mass of absolute ethanol frozen at -20°C, reflux in an ice-water bath at room temperature for 8 hours, add AlCl in batches at reflux at 80°C 3 80 ...

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
Granularityaaaaaaaaaa
Login to view more

Abstract

A high-strength refractory ceramic filter for catalytic cleaning is composed of supporting body and surficial layer of carrier-catalytic active components. It is prepared through such steps as breaking alumina (50-70%), zircon (20-35%) and aluminium fluoride (10-15%), mixing with aqueous solution of polyvinyl alcohol, shaping supporting body, calcining, preparing solution of Al sol from AlCl2 (28-32%), absolute alcohol, water and nitric acid, adding nitrates of Mg, Cu, Mn, Co, Pd, La Si and K, reflowing, concentrating, immersing the supporting body in the solution, drying, and calcining.

Description

Technical field [0001] The invention relates to a high-strength, high-temperature-resistant ceramic catalytic purification filter used in exhaust gas purification and molten steel filtration, and a production method thereof. Background technique [0002] The traditional catalytic purification filter generally consists of three parts: a porous ceramic support, a catalyst carrier and a catalytically active component. The support body of the catalytic purification filter is mostly made of cordierite porous ceramics. This material has the advantages of low price and wide sources, but it also has a low melting point (1400°C). It tends to undergo phase change when the temperature is close to 1000°C and is easy to sinter And other shortcomings, the effect is not good under high temperature conditions. The function of the catalyst carrier is mainly to maintain the largest possible surface area of ​​the active material and to inhibit sintering. Its selection has always been...

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): B01D39/20B01D53/86B01J23/889C04B35/119C04B35/80C22B9/02
Inventor 穆柏春刘伟吴宪龙
Owner 穆柏春
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