Title: High surface area alpha aluminas

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.

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Inventors: Mitchell, III, Howard Lee (Baton Rouge, LA, US)

Application Number: 593844
Filing Date: 1975-07-07
Publication_date: 1977-03-15
Assignee: Exxon Research and Engineering Company (Linden, NJ)
Primary Class(es): 502/223 208/139, 423/625, 423/628, 502/230
Other Classes:
US Patent Ref:

2964480	Dec, 1960	Schwartz	252/439.
3151175	Sep, 1964	Goldsmith	252/439.
3224962	Dec, 1965	Baldwin	252/439.
3296119	Jan, 1967	Bicek	252/439.
3439061	Apr, 1969	Henderson et al.	252/439.
3672831	Jun, 1972	Duecker et al.	423/628.
3850849	Nov, 1974	Kiovsky et al.	252/463.

Other Refs:
Primary Examiner: Garvin, Patrick P.
Assistant Examiner:
Attorney: Proctor; Llewellyn A.