CN103214267A - Method for increasing honeycomb ceramic specific surface area - Google Patents
Method for increasing honeycomb ceramic specific surface area Download PDFInfo
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- CN103214267A CN103214267A CN2013101004096A CN201310100409A CN103214267A CN 103214267 A CN103214267 A CN 103214267A CN 2013101004096 A CN2013101004096 A CN 2013101004096A CN 201310100409 A CN201310100409 A CN 201310100409A CN 103214267 A CN103214267 A CN 103214267A
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- Prior art keywords
- honey comb
- ceramic honey
- burn
- satin
- specific area
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Abstract
The invention discloses a method for increasing honeycomb ceramic specific surface area. According to the invention, aluminum hydroxide powder is calcined for 4-6h under a temperature of 500-600 DEG C, such that the material is converted into a gamma-Al2O3 crystalline phase. Gamma-Al2O3 powder is mixed with aluminum sol with a concentration of 15-20%, and the mixture is subjected to bal milling for 18-24h, such that a slurry is prepared; honeycomb ceramic is pre-soaked for 16-24h by using a 5-15% nitric acid solution; washing and bake-drying are carried out; and the ceramic is impregnated by using the active aluminum oxide slurry; bake-dying is carried out, and the ceramic is calcined for 4-6h under a temperature of 500-600 DEG C. With the method for increasing the specific surface area of the honeycomb ceramic, the specific surface area of the obtained carrier is increased to 10-15m<2>/g.
Description
Technical field
The invention belongs to the stupalith field, relate to a kind of preparation method of ceramic honey comb, be specifically related to a kind of increase ceramic honey comb method for specific area.
Background technology
At present, people's living space is just suffering serious destruction, and one of the main reasons is the pollution that comes from " air killer "-motor-vehicle tail-gas.Along with going deep into of China's opening and market economy, the industry of China, transportation obtains high speed development, various automobiles, power assist vehicle, Motor vehicles such as diesel motor shuttle back and forth and do not stop, hurry back and forth in streets and lanes, in economic spring tide, play immeasurable effect, but people also recognize own environment on every side suddenly and worsen just day by day, these vehicles that roar past are discharged into airborne waste gas such as thick smoke, make urban environment be subjected to severe contamination, contain carbon monoxide in the motor-vehicle tail-gas, hydrogen compound and particulate state objectionable impurities, seriously jeopardize HUMAN HEALTH, therefore the purification and the environmental improvement of waste gas have to be solved, the U.S. has just worked out the Abgasgesetz of motor car engine the beginning of the seventies, develop first-generation waste gas purification apparatus-pellet type catalyst, and develop s-generation iolite honeycomb ceramic catalyst, compare with the former, it has light specific gravity, volume is little, thermal shock resistance is good, firmly be difficult for broken, characteristics such as installing/dismounting and cleaning and regeneration are convenient, the employing ceramic honey comb is a carrier, be coated with carried catalyst, catalytic purification to motor vehicle exhaust gases plays effective function, and thin wall honeycomb ceramic has sound absorption, supporting design sound damper can reduce exhaust noise.
Along with increasing sharply of China's motor vehicle amount, when emission standard is worked out in strictness, take on motor vehicle, to install arrangement for catalytic purification and carry out exhaust aftertreatment, this is the simple and effective method that reduces automobile gas emission pollution, state such as the U.S., Japan extensively adopts this method, China also payes attention to problem of environmental pollution just day by day, along with China to the formulation of environmental improvement rules with progressively put into effect, the application of ceramic honeycomb catalyst will have boundless potentiality.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of increase ceramic honey comb method for specific area.
Increase ceramic honey comb method for specific area of the present invention comprises the steps:
Burn 4h-6h with aluminium-hydroxide powder through 500 ℃ of-600 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase is with γ-Al
2O
3Powder and concentration be 15%-20% aluminium colloidal sol by a certain percentage mixing and ball milling 18h-24h make slurries, ceramic honey comb soaks 16h-24h with the salpeter solution of 5%-15% in advance, and, carrying out the dipping of activated alumina slurries again through washing, oven dry, drying and 500 ℃ of-600 ℃ of satin burn 4h-6h and burn till.
Preferably, burn 5h with aluminium-hydroxide powder through 550 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase.
Preferably, with γ-Al
2O
3Powder and concentration be 18% aluminium colloidal sol by a certain percentage mixing and ball milling 20h make slurries.
Preferably, ceramic honey comb soaks 20h with 10% salpeter solution in advance.
Preferably, 550 ℃ of satin burning 5h burn till finished product.
Adopt the specific surface area of increase ceramic honey comb method for specific area gained carrier of the present invention to increase to 10-15m
2/ g.
Embodiment
Below in conjunction with embodiment increase ceramic honey comb method for specific area of the present invention is described in detail; thereby protection scope of the present invention is made more explicit defining so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that.
Embodiment 1
Burn 6h with aluminium-hydroxide powder through 500 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase is with γ-Al
2O
3Powder and concentration be 15% aluminium colloidal sol by a certain percentage mixing and ball milling 18h make slurries, ceramic honey comb soaks 24h with 5% salpeter solution in advance, and through washing, oven dry, carries out the dipping of activated alumina slurries again, drying and 500 ℃ of satin burn 6h and burn till.
Embodiment 2
Burn 4h with aluminium-hydroxide powder through 600 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase is with γ-Al
2O
3Powder and concentration be 20% aluminium colloidal sol by a certain percentage mixing and ball milling 24h make slurries, ceramic honey comb soaks 16h with 15% salpeter solution in advance, and through washing, oven dry, carries out the dipping of activated alumina slurries again, drying and 600 ℃ of satin burn 4h and burn till.
Embodiment 3
Burn 5h with aluminium-hydroxide powder through 550 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase is with γ-Al
2O
3Powder and concentration be 18% aluminium colloidal sol by a certain percentage mixing and ball milling 20h make slurries, ceramic honey comb soaks 20h with 10% salpeter solution in advance, and through washing, oven dry, carries out the dipping of activated alumina slurries again, drying and 550 ℃ of satin burn 5h and burn till.
The foregoing description does not limit the present invention in any way, and every employing is equal to replaces or technical scheme that the mode of equivalent transformation obtains all drops in protection scope of the present invention.
Claims (5)
1. one kind increases the ceramic honey comb method for specific area, it is characterized in that, comprises the steps:
Burn 4h-6h with aluminium-hydroxide powder through 500 ℃ of-600 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase is with γ-Al
2O
3Powder and concentration be 15%-20% aluminium colloidal sol by a certain percentage mixing and ball milling 18h-24h make slurries, ceramic honey comb soaks 16h-24h with the salpeter solution of 5%-15% in advance, and, carrying out the dipping of activated alumina slurries again through washing, oven dry, drying and 500 ℃ of-600 ℃ of satin burn 4h-6h and burn till.
2. increase ceramic honey comb method for specific area according to claim 1 is characterized in that: burn 5h with aluminium-hydroxide powder through 550 ℃ of satin and make it to be converted into γ-Al
2O
3Crystalline phase.
3. increase ceramic honey comb method for specific area according to claim 1 is characterized in that: with γ-Al
2O
3Powder and concentration be 18% aluminium colloidal sol by a certain percentage mixing and ball milling 20h make slurries.
4. increase ceramic honey comb method for specific area according to claim 1 is characterized in that: ceramic honey comb soaks 20h with 10% salpeter solution in advance.
5. increase ceramic honey comb method for specific area according to claim 1 is characterized in that: 550 ℃ of satin burn 5h and burn till finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101004096A CN103214267A (en) | 2013-03-26 | 2013-03-26 | Method for increasing honeycomb ceramic specific surface area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101004096A CN103214267A (en) | 2013-03-26 | 2013-03-26 | Method for increasing honeycomb ceramic specific surface area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103214267A true CN103214267A (en) | 2013-07-24 |
Family
ID=48812490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101004096A Pending CN103214267A (en) | 2013-03-26 | 2013-03-26 | Method for increasing honeycomb ceramic specific surface area |
Country Status (1)
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| CN (1) | CN103214267A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803618A (en) * | 2005-01-11 | 2006-07-19 | 中国科学院大连化学物理研究所 | Process for preparing mesopored alumina |
| CN102125836A (en) * | 2010-12-30 | 2011-07-20 | 青岛科技大学 | Monolithic catalyst for producing hydrogen by hydroboron hydrolysis and preparation method thereof |
| CN102872920A (en) * | 2011-07-11 | 2013-01-16 | 中国石油化工股份有限公司 | Preparation method of catalyst for catalytic combustion of organic exhaust gas |
-
2013
- 2013-03-26 CN CN2013101004096A patent/CN103214267A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803618A (en) * | 2005-01-11 | 2006-07-19 | 中国科学院大连化学物理研究所 | Process for preparing mesopored alumina |
| CN102125836A (en) * | 2010-12-30 | 2011-07-20 | 青岛科技大学 | Monolithic catalyst for producing hydrogen by hydroboron hydrolysis and preparation method thereof |
| CN102872920A (en) * | 2011-07-11 | 2013-01-16 | 中国石油化工股份有限公司 | Preparation method of catalyst for catalytic combustion of organic exhaust gas |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130724 |