Preparation of stabilized alumina having enhanced resistance to

Details Preparation of stabilized alumina having enhanced resistance to Preparation of stabilized alumina having enhanced resistance to

1995-02-22

1997-01-14

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423628, C01F 702

Patent

active

055936547

ABSTRACT:
A process for preparing stabilized alumina having increased surface area retention at high temperature in which a gel of a boehmite alumina which has been obtained by hydrothermally treating an aqueous mixture of a precursor boehmite alumina having a pH of from about 5 to about 9 for a period of time sufficient to convert the greater portion of the precursor boehmite alumina to a colloidal sol is subjected to working as, for example, by using a sufficient shearing force for a sufficient period of time to produce a worked boehmite alumina which has an increase in pore volume of at least about 30 percent and an increase of median pore radius of at least about 20 percent, a stabilizer being added to the boehmite alumina, the stabilizer being an oxide of a metal such as barium or a metal included in the lanthanide series of metals or a compound of such metals which converts to an oxide at elevated temperatures.

REFERENCES:
patent: 3956186 (1976-05-01), Iwase et al.
patent: 4220559 (1980-09-01), Polinski
patent: 4248852 (1981-02-01), Wakabayashi et al.
patent: 4261862 (1981-04-01), Kinoshita et al.
patent: 4528279 (1985-07-01), Suzuki et al.
patent: 4676928 (1987-06-01), Leach et al.
patent: 4677095 (1987-06-01), Wan et al.
patent: 4711872 (1987-12-01), Kato et al.
patent: 4722920 (1988-02-01), Kimura et al.
patent: 4771028 (1988-09-01), Arai et al.
patent: 4791091 (1988-12-01), Bricker et al.
patent: 4843056 (1989-06-01), Matsumoto et al.
patent: 4859433 (1989-08-01), Pereira et al.
patent: 4861410 (1989-08-01), Clark et al.
patent: 5055019 (1991-10-01), Meyer et al.
Technical Information, Etrusion of CATAPAL Alumina by Vista Chemical Co. Mizukami, Nippon Kagaku Kaishi, No. 9, 1542 (1988), no month.
Machida, et al. J. Am. Ceram. Soc. 71 (12), 1142 (1989), no month.

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