Claims
- 1. A method for the catalytic cracking of a hydrocarbon feed to transfer it essentially into gasoline, gas and hydrogen, which comprises contacting said hydrocarbon feed with a catalytically effective cracking amount of catalyst wherein the catalyst is a binary zeolitic system comprised of zeolites, A and B, having different crystalline structures while having common structural units, wherein the crystals of the zeolite A forming a central core are selected from the group consisting of offretite and omega zeolite and are surrounded by a crown or ring of crystals of zeolite B, which are selected from the group consisting of omega zeolite and mordenite, the zeolites A and B being disposed concentrically and following the same longitudinal axis, and thereafter recovering gasoline, gas and hydrogen.
- 2. The method of claim 1, wherein the hydrocarbon feed is a petroleum cut.
- 3. A method for increasing the yield of gasoline from the catalytic cracking of a petroleum cut, which comprises contacting said petroleum cut with a catalytically effective cracking amount of a catalyst, wherein the catalyst is a binary zeolitic system comprised of zeolites, A and B, having different crystalline structures while having common structural units, wherein the crystals of the zeolite A forming a central core are selected from the group consisting of offretite and omega zeolite and are surrounded by a crown or ring of crystals of zeolite B, which are selected from the group consisting of omega zeolite and mordenite, the zeolites A and B being disposed concentrically and following the same longitudinal axis, and thereafter recovering said gasoline.
Parent Case Info
This is a division of application Ser. No. 64,321, filed June 19, 1987, now U.S. Pat. No. 4,847,224.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4309280 |
Rosinski et al. |
Jan 1982 |
|
4847224 |
Fajula et al. |
Jul 1989 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
64321 |
Jun 1987 |
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