Claims
- 1. A method of hydrocarbon conversion comprising contacting hydrocarbons under suitable conversion conditions with a catalyst composition that is substantially free of crystalline aluminum phosphate which has been prepared by the steps of:
- (a) combining zeolite Beta with a matrix precursor comprising pseudoboehmite alumina to produce a mixture;
- (b) forming particles from the mixture;
- (c) calcining the formed particles;
- (d) modifying the calcined particles by treating the calcined particles with an aqueous solution of a phosphorus containing compound; and
- (e) recovering the catalyst composition by calcining the phosphorus modified particles.
- 2. The method according to claim 1, wherein the matrix precursor consists of pseudoboehmite alumina and at least one component selected from the group consisting of clay, a source of silica, a source of zirconia, and combinations thereof.
- 3. The method according to claim 1, wherein the matrix precursor consists of pseudoboehmite alumina, colloidal silica, and kaolin clay.
- 4. The method according to claim 1, further comprising contacting the hydrocarbons with the catalyst composition and with a second molecular sieve catalyst comprising a large-pore zeolite or a shape-selective zeolite.
- 5. The method according to claim 4, wherein the large pore zeolite is selected from the group consisting of X, Y, ultrastable Y, rare earth exchanged Y, rare earth exchanged ultrastable Y, and combinations thereof, and wherein the shape-selective zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, and ZSM-22.
- 6. The method according to claim 4, wherein the catalytic conditions comprise fluid catalytic cracking conditions including a riser top temperature of from about 500.degree. C. to about 595.degree. C., a catalyst to oil weight ratio of from about 3 to about 12, and a catalyst residence time of from about 0.5 to about 15 seconds.
- 7. The method according to claim 4, wherein the catalytic conditions comprise hydrocracking conditions including a temperature of from about 150.degree. C. to about 550.degree. C., a pressure of from about 100 psig to about 3,000 psig, a weight hourly space velocity of from about 0.1 hour-1 to about 100 hour-1, and a hydrogen to hydrocarbon molar ratio of from about 0.1 to about 100.
- 8. The method according to claim 1, wherein the hydrocarbons are contacted under catalytic conditions suitable to reduce the molecular weight of the hydrocarbons to a lower value.
- 9. The method according to claim 1, wherein the conversion conditions comprise a temperature of from about 200.degree. C. to about 800.degree. C., a pressure of from about atmospheric to about 100 psig, and a contact time of from about 0.1 second to about 60 minutes.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of application Ser. No. 08/158,325, filed on Nov. 29, 1993 now U.S. Pat. No. 5,457,078.
US Referenced Citations (8)
Continuations (1)
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Number |
Date |
Country |
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158325 |
Nov 1993 |
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