High surface area alpha aluminas

Details High surface area alpha aluminas High surface area alpha aluminas

1975-07-07

1977-03-15

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252441, 252442, 252463, 208139, B01J 2704, B01J 2710

Patent

active

040123375

ABSTRACT:
Alpha alumina, as a new composition of matter, particularly suitable as a support for catalyst compositions (especially reforming catalysts), having surface areas in excess of 75 m.sup.2 /g (B.E.T), ranging preferably from 100 m.sup.2 /g to 600 m.sup.2 lg, and higher, and more preferably from 150 m.sup.2 lg to 400 m.sup.2 /g. A novel process is also described wherein these novel alpha alumina compositions are formed from hydrated beta alumina, especially .beta.-Al.sub.2 O.sub.3.H.sub.2 O, at critical low-temperature, low water-vapor pressure conditions, preferably also at low system pressure or under vacuum. The alpha alumina is particularly useful as a support for a Group VIII noble metal reforming catalyst.

REFERENCES:
patent: 2964480 (1960-12-01), Schwartz
patent: 3151175 (1964-09-01), Goldsmith
patent: 3224962 (1965-12-01), Baldwin
patent: 3296119 (1967-01-01), Bicek
patent: 3439061 (1969-04-01), Henderson et al.
patent: 3672831 (1972-06-01), Duecker et al.
patent: 3850849 (1974-11-01), Kiovsky et al.

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