Title:
ALUMINA COMPOSITION AND METHOD FOR PREPARING THE SAME
Document Type and Number:
WIPO Patent Application WO/2001/056926
Kind Code:
A1
Abstract:
An alumina composition capable of being widely changed with controllability with respect to specific surface area, pore volume and pore diameter distribution, which is prepared by a method characterized in that it comprises providing an adjusted liquid having a predetermined ratio of alumina, acid and water through mixing an acid-containing alumina obtained by heating aluminum hydroxide in the presence of a monobasic acid or a salt thereof at a temperature ranging 70 to 400 °C and/or an alumina having $g(r)- and $g(x)-crystal structures with water and/or a monobasic acid or a salt thereof, and subjecting the adjusted liquid to a hydrothermal reaction optionally in the presence of an oxygen-containing organic compound and/or an inorganic polybasic acid as a pore structure-controlling agent, and drying the resultant acidic aqueous alumina sol-gel followed by calcination; a method for preparing the alumina composition; and a catalyst comprising the alumina composition as a carrier.
Inventors:
SATO GORO (JP)
SATO MASAYOSHI (JP)
SATO MASAYOSHI (JP)
Application Number:
PCT/JP2000/000620
Publication Date:
August 09, 2001
Filing Date:
February 04, 2000
Export Citation:
Assignee:
SATO GORO (JP)
SATO MASAYOSHI (JP)
SATO MASAYOSHI (JP)
International Classes:
B01J21/04; C01F7/448; B01J32/00; (IPC1-7): C01F7/44; C04B35/10; B01J21/04; B01J32/00; C01F7/02
Foreign References:
| EP0885844A1 | 1998-12-23 | |||
| US4344928A | 1982-08-17 | |||
| JPH02293371A | 1990-12-04 |
Other References:
JANUSZ T. TRAWCZYNSKI: "Effect of Aluminium Hydroxide Precipitation Conditions on the Alumina Surface Acidity", IND. ENG. CHEM. RES., vol. 35, no. 1, 1996, pages 241 - 244, XP002928256
Attorney, Agent or Firm:
Suzuki, Shunichiro (Nishigotanda 7-chome Shinagawa-ku, Tokyo, JP)
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