CN1528668A - Method for preparing fine grained active alumina - Google Patents
Method for preparing fine grained active alumina Download PDFInfo
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- CN1528668A CN1528668A CNA2003101053065A CN200310105306A CN1528668A CN 1528668 A CN1528668 A CN 1528668A CN A2003101053065 A CNA2003101053065 A CN A2003101053065A CN 200310105306 A CN200310105306 A CN 200310105306A CN 1528668 A CN1528668 A CN 1528668A
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- aluminium hydroxide
- rotary kiln
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- grannular
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Abstract
The invention relates to a granule active aluminum oxide preparing method, baking the industrial aluminum hydroxide during blending, cooling and screening to make granule active aluminum oxide. It is skillful and simple and easy to apply, and the active aluminum made has high activity and purity, beneficial to spread and apply and applied to catalyst carrier and catalyst in petrochemical and medicinal industries and also metabolite and fiber coloring matter to absorb microbe in biopharmacy.
Description
Technical field
The present invention relates to a kind of preparation method of fine-grannular activated alumina, be catalyzer, sorbent material manufacturing technology field.
Background technology
Aluminium hydroxide is industrial important source material, and commercially available aluminium hydroxide contains more black granular compound, has influence on the whiteness of product, often because the influence of impurity can not directly be used for support of the catalyst and catalyzer, impurity must be handled trace, as Na
2O content need drop to below the 50PPM from several thousand PPM, also has some atraments, need make industrial aluminium hydroxide convert sodium metaaluminate to alkali lye such as sodium hydroxide, carries out kind of branch or carbon branch purifying treatment again.This processing can obtain the clean aluminium hydroxide of pure white no black saccharoid.But its purity and activity are still undesirable, and in the strict especially field of ask for something, as medicine industry, it is used and still has been subjected to considerable restraint.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of fine-grannular activated alumina, simple, the aluminium oxide active that makes is big, the purity height.
The preparation method of fine-grannular activated alumina of the present invention is that industrial aluminium hydroxide is calcined under agitation condition, and the screening of cooling back makes.
Wherein calcining temperature is advisable with 500 ℃～800 ℃, and the calcinate of this moment is active gama-alumina.
The calciner that can finish stirring is preferably rotary kiln, and is scientific and reasonable, is convenient to implementation and operation, control.The rotating speed of control rotary kiln is good with 0.8～3 rev/min.Aluminium hydroxide adds in the rotary kiln with 40～100Kg/ hour feeding quantity, and aluminium hydroxide is about 20 minutes through the time of rotary kiln.
For the higher commercially available industrial aluminium hydroxide of purity, can directly carry out calcination processing, above-mentioned calcining has also been eliminated most of impurity wherein when finishing the aluminum oxide conversion.If when foreign matter contents such as atrament are big, can before calcining, purify pre-treatment, better effects if to aluminium hydroxide.The purification pre-treatment adopts common conventional purifying treatment to get final product, and aluminium hydroxide is joined in the alkali lye, by generating sodium metaaluminate, again by obtaining purified aluminium hydroxide after kind of branch or the carbon divisional processing.
The fine-grannular activated alumina product that obtains is by X-ray diffraction analysis, and its crystalline phase is a gama-alumina, carries out physical and chemical index and measures, and its specific surface area is 150～280m
2/ g, pore volume are 0.38～0.45ml/g.Product practical situations on pharmaceutical industries proves, and is respond well, has sorbent material and catalyzer superperformance.
The preparation method of fine-grannular activated alumina of the present invention designs ingenious, and is simple, and the aluminium oxide active that makes is big, and the purity height is beneficial to and applies.The fine-grannular activated alumina product that makes is applicable to the support of the catalyst and the catalyzer of petrochemical industry, pharmaceutical industries, also is applicable in the bio-pharmaceuticals meta-bolites of absorption microorganism and fiber pigment etc.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
The preparation method of fine-grannular activated alumina of the present invention, with commercially available aluminium hydroxide drying, its water content is controlled at 3%, in the rotary kiln of 40Kg/ hour feeding quantity with 2 rev/mins of aluminium hydroxide addings, the calcining temperature of rotary kiln is controlled to be 550 ℃～600 ℃, and the material cooling back screening after the calcining makes product.
Embodiment 2
The preparation method of fine-grannular activated alumina of the present invention, industrial aluminium hydroxide is purified pre-treatment before calcining, industrial aluminium hydroxide is joined in the sodium hydroxide lye, by generating sodium metaaluminate, again by obtaining more purified aluminium hydroxide after kind of branch or the carbon divisional processing.
Aluminium hydroxide after purifying added with 50Kg/ hour feeding quantity in 2.5 rev/mins the rotary kiln, the calcining temperature of rotary kiln is controlled to be 580 ℃～610 ℃, and the material cooling back screening after the calcining makes product.
Embodiment 3
The preparation method of fine-grannular activated alumina of the present invention, with commercially available aluminium hydroxide drying, its water content is controlled at 2%, in the rotary kiln of 80Kg/ hour feeding quantity with 1.5 rev/mins of aluminium hydroxide addings, the calcining temperature of rotary kiln is controlled to be 600 ℃～640 ℃, and the material cooling back screening after the calcining makes product.
Embodiment 4
The preparation method of fine-grannular activated alumina of the present invention, with commercially available aluminium hydroxide drying, its water content is controlled at 4%, in the rotary kiln of 60Kg/ hour feeding quantity with 3 rev/mins of aluminium hydroxide addings, the calcining temperature of rotary kiln is controlled to be 680 ℃～720 ℃, and the material cooling back screening after the calcining makes product.
Claims (6)
1, a kind of preparation method of fine-grannular activated alumina is characterized in that industrial aluminium hydroxide is calcined under agitation condition, and the screening of cooling back makes.
2, preparation method according to claim 1 is characterized in that calcining temperature is 500 ℃～800 ℃.
3, preparation method according to claim 1 and 2 is characterized in that calcining and carries out in rotary kiln.
4, preparation method according to claim 3, the rotating speed that it is characterized in that rotary kiln is 0.8～3 rev/min.
5, preparation method according to claim 4 is characterized in that aluminium hydroxide needs through purifying pre-treatment before calcining.
6, preparation method according to claim 5, it is characterized in that purifying pre-treatment is that aluminium hydroxide is joined in the alkali lye, by generating sodium metaaluminate, again by obtaining purified aluminium hydroxide after kind of branch or the carbon divisional processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101053065A CN1528668A (en) | 2003-10-09 | 2003-10-09 | Method for preparing fine grained active alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101053065A CN1528668A (en) | 2003-10-09 | 2003-10-09 | Method for preparing fine grained active alumina |
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| Publication Number | Publication Date |
|---|---|
| CN1528668A true CN1528668A (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2003101053065A Pending CN1528668A (en) | 2003-10-09 | 2003-10-09 | Method for preparing fine grained active alumina |
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| CN (1) | CN1528668A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671266A (en) * | 2013-11-28 | 2015-06-03 | 北京阳光欣禾科技有限公司 | Process for preparing ultrafine aluminum hydroxide by seed crystal precipitation method |
| CN104817100A (en) * | 2015-04-15 | 2015-08-05 | 中南大学 | Method for preparing sand-shaped aluminum oxide |
| CN105548181A (en) * | 2015-12-10 | 2016-05-04 | 河源富马硬质合金股份有限公司 | Method for verifying and detecting impurity elements in raw and auxiliary materials used for production of hard alloy |
| CN110961163A (en) * | 2019-12-12 | 2020-04-07 | 福建师范大学泉港石化研究院 | Phosphorus-modified mesoporous alumina with high thermal stability and preparation method thereof |
-
2003
- 2003-10-09 CN CNA2003101053065A patent/CN1528668A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671266A (en) * | 2013-11-28 | 2015-06-03 | 北京阳光欣禾科技有限公司 | Process for preparing ultrafine aluminum hydroxide by seed crystal precipitation method |
| CN104817100A (en) * | 2015-04-15 | 2015-08-05 | 中南大学 | Method for preparing sand-shaped aluminum oxide |
| CN105548181A (en) * | 2015-12-10 | 2016-05-04 | 河源富马硬质合金股份有限公司 | Method for verifying and detecting impurity elements in raw and auxiliary materials used for production of hard alloy |
| CN105548181B (en) * | 2015-12-10 | 2018-06-12 | 河源富马硬质合金股份有限公司 | A kind of method that raw and auxiliary material impurity element to CEMENTED CARBIDE PRODUCTION carries out verification detection |
| CN110961163A (en) * | 2019-12-12 | 2020-04-07 | 福建师范大学泉港石化研究院 | Phosphorus-modified mesoporous alumina with high thermal stability and preparation method thereof |
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