Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Including organic component
Patent
1988-12-30
1990-03-06
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Including organic component
502 66, 502 86, B01J 2906, B01J 2022
Patent
active
049065998
ABSTRACT:
A novel zeolite hydrocracking catalyst which contains NH.sub.4.sup.+ sites, at ambient temperatures, and surface sites constituted of a chemisorbed silica-containing species, and process for producing said catalyst. The process for preparation of the catalyst includes a series of steps: an initial step wherein an acid zeolite, or acid zeolite hydrocracking catalyst, is treated with an agent, e.g., a nitrogen-containing compound, suitably ammonia, to convert the H.sup.+ sites throughout said zeolite framework to NH.sub.4.sup.+ sites, and a subsequent post treatment of said NH.sub.4.sup.+ zeolite with an organosilane to silylate, modify and form on the surface of said zeolite a chemisorbed silica species, e.g., --O--Si(CH.sub.3).sub.3. The surface silylated catalyst is useful for the production of high octane gasoline. When employed at elevated temperatures in a hydro-cracking operation the catalyst will evolve ammonia and convert to a surface silylated H.sup.+ zeolite catalyst to produce a high octane gasoline, at low hydrogen consumption.
REFERENCES:
patent: 3404086 (1968-10-01), Plank et al.
patent: 3725302 (1973-04-01), Shimely et al.
patent: 4390414 (1983-06-01), Cody
patent: 4451572 (1984-05-01), Cody
patent: 4477586 (1984-10-01), Rodewald
Cody Ian A.
Hamner deceased Glen P.
Dees Carl F.
Exxon Research & Engineering Co.
Ott Roy J.
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