CN1962062A - Preparation method of aluminium sol and application thereof - Google Patents
Preparation method of aluminium sol and application thereof Download PDFInfo
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- CN1962062A CN1962062A CN 200610129591 CN200610129591A CN1962062A CN 1962062 A CN1962062 A CN 1962062A CN 200610129591 CN200610129591 CN 200610129591 CN 200610129591 A CN200610129591 A CN 200610129591A CN 1962062 A CN1962062 A CN 1962062A
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Abstract
The invention relates to a method for preparing aluminum gel, which comprises: (1), using diaspore powder as material, via mol ratio of aluminum and water is 1:20-50, adding into deionized water, mixing, dispersing; (2), via mol ratio between hydrogen ion and aluminum ion is 1:1-20, adding inorganic acid, mixing, dissolving in normal temperature to form semi-transparent gel; (3), mixing for 2-5hours, to form stable product. When in application, adds needed catalyst into said aluminum gel to form slurry, to coat it on the metal beehive or ceramic beehive surface, baking at 500-800Deg. C for 3-5h, and fixing the catalyst on the carrier via aluminum gel; washing it with alcohol solution for 10min via ultrasonic wave at 100Hz, its carrier fall ratio is lower than 5%.
Description
Technical field
The present invention relates to a kind of preparation method of resistant to elevated temperatures inorganic binder, particularly a kind of preparation method of aluminium colloidal sol and application thereof promptly are used for the preparation technology of the aluminium colloidal sol that honeycomb substrate and catalyst bonding uses.
Background technology
At present, aluminium colloidal sol is widely used in industrial catalyst field, motor vehicle environmental technology field as a kind of inorganic binder.
Existing Chinese patent 93112576.6, patent name: a kind of preparation method of monodisperse aluminium collosol; Under 85～99 ℃ of heating and 8～80 hours situation of employing reflux digestion, prepared a kind of monodisperse aluminium collosol.Existing Chinese patent 00110421.7, patent name: a kind of preparation method of aluminium colloidal sol; Prepared stable, aluminium colloidal sol clearly under normal temperature and ultrasonic wave effect, one of its feature is " the aluminium source is aluminum nitrate, aluminum sulfate and aluminium chloride ".Existing Chinese patent 03112017.2, patent name: a kind of new technology for preparing aluminium colloidal sol; Be that the heating stirring reaction formed aluminium colloidal sol in 2～18 hours in 80～150 ℃ of scopes, principal character is " aluminium source and hydrochloric acid mix in proportion ".The technology of above-mentioned patented technology is relatively complicated, and production cost is relative with instructions for use higher.
Therefore, how simplifying technology, make its reaction, application conditions is loose, pollution-free, and improve its inherent quality, reduce and produce and use cost, is one of the current urgency in this field difficult problem to be solved.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, provide that a kind of technology is simple, easy to use, the preparation method and the application thereof of the aluminium colloidal sol that effectively reduces cost.
The technical solution adopted in the present invention is for achieving the above object: a kind of preparation method of aluminium colloidal sol; It is characterized in that implementation step is as follows:
(1) be primary raw material with the boehmite powder, according to aluminium: the molar ratio of water is 1: 20～50, joins in the deionized water gradually, stirs while feed in raw material, until whole dispersions;
(2) according to hydrogen ion: aluminum ions mol ratio is 1: 1～20, takes by weighing inorganic acid, as nitric acid, hydrochloric acid, adds acid solution while stirring, and acidolysis at normal temperatures forms translucent colloidal sol;
(3) continuous stirring 2～5 hours at normal temperatures forms stable aluminium colloidal sol.
A kind of application of aluminium colloidal sol is characterized in that implementation step is as follows:
In the aluminium colloidal sol of preparation according to the method described above, add required catalyst routinely, the granularity of catalyst is controlled at 1～20 micron, and strong agitation formed uniform slurry in 2～5 hours, directly was coated in metallic honeycomb substrate or ceramic honeycomb carrier surface; Through high-temperature roasting in 500～800 ℃, 3～5 hours, catalyst just was fixed on carrier surface by aluminium colloidal sol.
The invention has the beneficial effects as follows: its strong adhesion of aluminium colloidal sol, the hiding rare height that adopt this method to make, through 100Hz supersound washing in 10 minutes, the expulsion rate of the catalyst of its load on average＜5% at ethanolic solution.This method can prepare stable aluminium colloidal sol at normal temperatures, and reaction condition is loose, has simplified preparation technology, and the effect highly significant effectively reduces preparation cost, and is easy to use, is widely used.
The specific embodiment
Embodiment 1
Boehmite powder 80 grams are added in 1000 ml deionized water, stir while feed in raw material, after interpolation finished, about 30 minutes of strong agitation was until whole dispersions.Then, in this dispersion liquid, slowly add 50 milliliters of nitric acid, continue at normal temperatures to stir 2～5 hours, form and stablize aluminium colloidal sol.
In the aluminium colloidal sol of above-mentioned preparation, add required catalyst; Catalyst host platiniferous, palladium, three kinds of noble metals of rhodium can be added according to conventional proportioning.
Granularity is controlled at 1～20 micron, and strong agitation formed slurry in 2～5 hours, directly was coated in metal beehive carrier or ceramic honeycomb carrier.Then, through high-temperature roasting in 500～800 ℃, 3～5 hours, catalyst just was fixed on carrier surface by aluminium colloidal sol.
Through 100Hz supersound washing in 10 minutes, its expulsion rate on average was no more than above-mentioned carrier loaded catalyst at ethanolic solution＜and 5%.
Embodiment 2
Boehmite powder 100 grams are added in 1000 ml deionized water, stir while feed in raw material, after interpolation finished, about 30 minutes of strong agitation was until whole dispersions.Then, in this dispersion liquid, slowly add 80 milliliters of hydrochloric acid, continue at normal temperatures to stir 2～5 hours, form and stablize aluminium colloidal sol.
In the aluminium colloidal sol of above-mentioned preparation, add required catalyst; Catalyst host platiniferous, palladium, three kinds of noble metals of rhodium can be added according to conventional proportioning.Granularity is controlled at 1～20 micron, and strong agitation formed slurry in 2～5 hours, directly was coated in metal beehive carrier or ceramic honeycomb carrier.Then, through high-temperature roasting in 500～800 ℃, 3～5 hours, catalyst was fixed on carrier surface by aluminium colloidal sol.
Through 100Hz supersound washing in 10 minutes, its expulsion rate on average was no more than above-mentioned carrier loaded catalyst at ethanolic solution＜and 5%.
Embodiment 3
Boehmite powder 70 grams are added in 1000 ml deionized water, stir while feed in raw material, after interpolation finished, about 30 minutes of strong agitation was until whole dispersions.Then, in this dispersion liquid, slowly add 60 milliliters of nitric acid, continue at normal temperatures to stir 2～5 hours, form and stablize aluminium colloidal sol.
In the aluminium colloidal sol of above-mentioned preparation, add required catalyst; Catalyst host platiniferous, palladium, three kinds of noble metals of rhodium can be added according to conventional proportioning.Granularity is controlled at 1～20 micron, and strong agitation formed slurry in 2～5 hours, directly was coated in metal beehive carrier or ceramic honeycomb carrier.Then, through high-temperature roasting in 500～800 ℃, 3～5 hours, catalyst just was fixed on carrier surface by aluminium colloidal sol.
Through 100Hz supersound washing in 10 minutes, its expulsion rate on average was no more than above-mentioned carrier loaded catalyst at ethanolic solution＜and 5%.
Above-mentioned detailed description of the preparation method and the application thereof of aluminium colloidal sol being carried out with reference to embodiment; be illustrative rather than determinate; can enumerate several embodiment according to limited ranges such as set of dispense ratios; therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (2)
1, a kind of preparation method of aluminium colloidal sol; It is characterized in that implementation step is as follows:
(1) be primary raw material with the boehmite powder, according to aluminium: the molar ratio of water is 1: 20～50, joins in the deionized water gradually, stirs while feed in raw material, until whole dispersions;
(2) according to hydrogen ion: aluminum ions mol ratio is 1: 1～20, takes by weighing inorganic acid, as nitric acid, hydrochloric acid, adds acid solution while stirring, and acidolysis at normal temperatures forms translucent colloidal sol;
(3) continuous stirring 2～5 hours at normal temperatures forms stable aluminium colloidal sol.
2, the application of a kind of aluminium colloidal sol according to claim 1 is characterized in that implementation step is as follows:
In the aluminium colloidal sol of preparation according to the method described above, add required catalyst routinely, the granularity of catalyst is controlled at 1～20 micron, and strong agitation formed uniform slurry in 2～5 hours, directly was coated in metallic honeycomb substrate or ceramic honeycomb carrier surface; Through high-temperature roasting in 500～800 ℃, 3～5 hours, catalyst just was fixed on carrier surface by aluminium colloidal sol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610129591 CN1962062A (en) | 2006-11-24 | 2006-11-24 | Preparation method of aluminium sol and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610129591 CN1962062A (en) | 2006-11-24 | 2006-11-24 | Preparation method of aluminium sol and application thereof |
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| CN1962062A true CN1962062A (en) | 2007-05-16 |
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| CN 200610129591 Pending CN1962062A (en) | 2006-11-24 | 2006-11-24 | Preparation method of aluminium sol and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288111A (en) * | 2013-06-28 | 2013-09-11 | 河南省格林沃特净化器股份有限公司 | Fast stabilization preparation method of alumina sol |
| CN104353400A (en) * | 2014-11-12 | 2015-02-18 | 山东恒通晶体材料有限公司 | Preparation method of high-purity high-solid content transparent aluminum sol |
| CN115172059A (en) * | 2022-08-09 | 2022-10-11 | 西安稀有金属材料研究院有限公司 | Method for preparing aluminum electrolytic capacitor anode foil by combining aerosol spraying method |
-
2006
- 2006-11-24 CN CN 200610129591 patent/CN1962062A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288111A (en) * | 2013-06-28 | 2013-09-11 | 河南省格林沃特净化器股份有限公司 | Fast stabilization preparation method of alumina sol |
| CN103288111B (en) * | 2013-06-28 | 2014-12-10 | 河南省格林沃特净化器股份有限公司 | Fast stabilization preparation method of alumina sol |
| CN104353400A (en) * | 2014-11-12 | 2015-02-18 | 山东恒通晶体材料有限公司 | Preparation method of high-purity high-solid content transparent aluminum sol |
| CN115172059A (en) * | 2022-08-09 | 2022-10-11 | 西安稀有金属材料研究院有限公司 | Method for preparing aluminum electrolytic capacitor anode foil by combining aerosol spraying method |
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