Claims
- 1. In a catalytic cracking process wherein a crackable hydrocarbon feedstock is cracked in a catalytic cracking means at catalytic cracking conditions by contact with a circulating inventory of catalytic cracking catalyst to produce catalytically cracked products, the improvement comprising use of a cracking catalyst comprising catalytically effective amounts of a non-layered, ultra large pore crystalline material exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams anhydrous crystal at 50 torr and 25.degree. C.
- 2. The process of claim 1 wherein the cracking catalyst inventory contains 10 to 80 wt % of said crystalline material.
- 3. The process of claim 1 wherein the cracking catalyst inventory contains catalytically effective amounts of at least one shape selective zeolite having a constraint index of 1-12.
- 4. The process of claim 3 wherein the shape selective zeolite is selected from the group of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-48, ZSM-57 and MCM-22.
- 5. The process of claim 4 wherein the shape selective zeolite is ZSM-5.
- 6. The process of claim 1 wherein the ultra large pore crystalline material is MCM-41.
- 7. The process of claim 1 wherein the ultra large pore crystalline material is an aluminosilicate.
- 8. The process of claim 1 wherein the catalyst inventory contains a catalytically effective amount of a large molecular sieve selected from the group of zeolite X, zeolite Y, rare earth Y, dealuminized Y, ultrahydrophobic Y, silicon enriched dealuminized Y zeolite and zeolite beta.
- 9. The process of claim 1 wherein the cracking process is conducted in a fluidized catalytic cracking reactor at fluidized catalytic cracking conditions.
- 10. In a catalytic cracking process comprising contacting a crackable hydrocarbon feedstock at catalytic cracking conditions in a catalytic cracking means with an inventory of catalytic cracking catalyst to produce catalytically cracked products, the improvement comprising use of a cracking catalyst comprising catalytically effective amounts of an ultra large pore crystalline material which is an inorganic, porous crystalline material having, after calcination, a hexagonal arrangement of pores having diameters of at least about 13 Angstrom Units and exhibiting a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 Angstrom Units.
- 11. The process of claim 10 wherein the cracking catalyst inventory contains 10 to 80 wt % of said crystalline material.
- 12. The process of claim 10 wherein the cracking catalyst inventory contains catalytically effective amounts of at least one shape selective zeolite having a constraint index of 1-12.
- 13. The process of claim 12 wherein the shape selective zeolite is selected from the group of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-48, ZSM-57 and MCM-22.
- 14. The process of claim 13 wherein the shape selective zeolite is ZSM-5.
- 15. The process of claim 10 wherein the ultra large pore crystalline material is MCM-41.
- 16. The process of claim 10 wherein the ultra large pore crystalline material is an aluminosilicate.
- 17. The process of claim 10 wherein the cracking process is conducted in a fluidized catalytic cracking reactor at fluidized catalytic cracking conditions.
- 18. A catalytic cracking catalyst for catalytic cracking of a hydrocarbon feedstock containing at least 10 wt % of hydrocarbons boiling above about 950.degree. F., in the absence of added hydrogen, to lighter products, comprising:
- 15 to 50 wt % non-layered, ultra large pore crystalline material exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams anhydrous crystal at 50 torr and 25.degree. C. and being essentially free of added hydrogenation components; and a matrix.
- 19. The catalyst of claim 18 having an average particle size within the range of about 50 to about 300 microns.
- 20. The catalyst of claim 18 wherein the ultra large pore material is MCM-41.
CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation-in-part of two prior co-pending applications Ser. No. 07/625,245, filed Dec. 10, 1990, now U.S. Pat. No. 5,098,684 issued Mar. 24, 1992, and Ser. No. 07/470,008, filed Jan. 25, 1990, now U.S. Pat. No. 5,102,643 issued Apr. 7, 1992. Ser. No. 07/625,245 was also a continuation-in-part of Ser. No. 07/470,008.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4309280 |
Rosinski et al. |
Jan 1982 |
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5057296 |
Beck |
Oct 1991 |
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5102643 |
Kresge et al. |
Apr 1992 |
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Non-Patent Literature Citations (1)
Entry |
"Ultralarge Pore Molecular Sieves", P. A. Jacobs & R. A. vanSanten, 1989 Elsevier Science Publishers, pp. 439-446. |
Related Publications (1)
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Date |
Country |
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625245 |
Dec 1990 |
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Continuation in Parts (2)
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Number |
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470008 |
Jan 1990 |
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Parent |
470008 |
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