Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1985-05-20
1986-10-14
Hearn, Brian E.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
208120, 502235, C10G 1104, C10G 4712
Patent
active
046171088
ABSTRACT:
A process for preparing silica-alumina compositions suitable as catalyst material comprises mixing a first aqueous solution containing an aluminum salt (preferably KAl(SO.sub.4).sub.2) and an ammonium salt (preferably (NH.sub.4).sub.2 SO.sub.4) with a second solution containing an alkali metal silicate (preferably Na.sub.2 SiO.sub.3), wherein the concentration of the ammonium salt is chosen so as to afford coprecipitation of silica-alumina hydrogel (preferably at a pH of about 3-6). The silica-alumina hydrogel is then separated, optionally dried, and calcined. Calcined silica-alumina can be employed as cracking catalysts or as supports for hydrofining/hydrocracking catalysts.
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Johnson Marvin M.
Shyr Yen-Shin
Brandes K. K.
Chaudhuri O.
Hearn Brian E.
Phillips Petroleum Company
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