Granulated active alumina
Патенты
| Язык: |
Немецкий |
| Тип: |
Заявка на патент |
| Номер (11) |
DE 2826095 A1 |
| Номер заявки (21): |
2826095.9-41 |
| Дата подачи заявки (22): |
14 июн. 1978 г. |
| Дата начала отсчета срока действия патента (24): |
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| Дата публикации патента (44,45,46): |
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| Дата публикации заявки (43): |
20 дек. 1979 г. |
| Авторы |
Vorobiev J.K.
,
Badaev B.N.
,
Ljubuško G.I.
,
Levickij E.A.
,
Boreskov G.K.
,
Andruškevič M.M.
,
Baum B.A.
,
Pachomov N.A.
,
Chomjakova L.G.
,
Chramov A.E.
,
Rodionova N.A.
,
Isaev B.N.
,
Knjazev V.M.
,
Moroz E.M.
,
Erofeev V.N.
,
Drušinin I.P.
,
Škrabina R.A.
|
| Организации |
| 1 |
Институт катализа им. Г.К. Борескова СО РАН
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A method is proposed for the manuf. of granulated Al2O3 as adsorbents, catalysts, or catalyst carriers in the chem. and petroleum-refining industries. The method involves: (1) thermal decompn. of Al(OH)3 in a fluidized bed of a solid heat carrier at 350-600° for 0.05-0.5 s; (2) treating with H2O at 20-80° and pH 5-10 for 0.5-8 h to a hydrated decompn. product with a ≥50% pseudoboehmite content; (3) treating the hydrated product with HNO3 or HCl at <150°; (4) granulation; (5) drying the granules at 20-150°; and (6) roasting at 400-600°. Thus, a mixt. of air and Al(OH)3 with ≤200 μ particles was passed through a fluidized bed of a solid heat carrier at 500° providing a 0.1 s contact time of the Al(OH)3 particles with the heat carrier. Amorphous Al(OH)3 with a surface area of 250 m2/g was formed in the bed at a 14% wt. loss. The amorphous Al(OH)3 was suspended in H2O to a concn. of 215 g Al(OH)3/L, the pH was adjusted to 8 with HNO3, and the suspension was stirred at 70° for 6 h and dried at 110° to a hydrated product contg. 75% pseudoboehmite and 25% bayerite. The hydrated product was suspended in H2O to a concn. of 250 g Al2O3/L and treated with HNO3 in an amt. of 0.15 mol HNO3/mol Al2O3 at 130° for 4 h to a viscous homogeneous paste. The latter was shaped into spherical granules, dried at 105°, and calcined at 550° to obtain active Al2O3 granules with a sp. surface area 350 m2/g, total pore vol. 0.71 cm3/g, predominant pore radius 60 Å, and compressive strength 95 kg/cm2.