Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1992-02-13
1994-01-11
Myers, Helane
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
208108, 208109, 208110, C10G 4702, C10G 4712
Patent
active
052777936
ABSTRACT:
This invention provides an improved hydrocracking catalyst which includes an inorganic oxide component, such as alumina, a hydrogenation component, such as a base metal or a noble metal and a zeolite component which is a Y-zeolite. The catalyst in this invention is particularly characterized in that the zeolite component of the catalyst has a number average crystal size of less than about 0.5 micron, preferably less than about 0.4 micron. In the process aspect of this invention the use of the above catalyst in hydrocracking processes provides improved liquid fraction yields, particularly yields of high octane gasoline, diesel fuel and premium quality jet fuel. The catalyst also produces a corresponding decrease in production of light gasses, while providing no significant increase in coking or decrease in catalyst life. In another aspect this invention provides a Y-type zeolite having an average crystal size of less than about 0.5 micron which comprises less than about 0.5 wt. % alkaline metal oxide and which contains an effective amount of oxometallic cations positioned in the beta-cages of the zeolite to substantially stabilize the zeolite against the thermal degradation.
REFERENCES:
patent: 4456527 (1984-06-01), Buss et al.
patent: 4500645 (1985-02-01), Fuchikami
patent: 4784747 (1988-11-01), Shihabi
Bezman Richard D.
Cash Dennis R.
Cavalieri V. J.
Chevron Research and Technology Company
Myers Helane
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