Claims
- 1. A process for dewaxing a waxy hydrocarbon feedstock, said process comprising contacting said feedstock with a catalyst composition under hydroisomerization conditions to produce a product with a reduced pour point, said catalyst composition comprising a synthetic zeolite characterized by an X-ray diffraction pattern including values substantially as shown in Table A of the specification and having an Alpha Value of about 10 or less.
- 2. The process of claim 1 wherein said zeolite is characterized by an X-ray diffraction pattern including values substantially as shown in Table B of the specification.
- 3. The process of claim 1 wherein the zeolite is characterized by an x-ray diffraction pattern including values substantially as shown in Table C of the specification.
- 4. The process of claim 1 wherein the zeolite is characterized by an X-ray diffraction pattern including values significantly as shown in Table D of the specification.
- 5. The process of claim 1 wherein the synthetic zeolite has a composition comprising the molar relationship:
- X.sub.2 O.sub.3 : (n)YO.sub.2
- wherein X is a trivalent element selected from the group consisting of aluminum, boron, iron, and gallium, Y is a tetravalent element selected from the group consisting of silicon and germanium, and n is at least about 10.
- 6. The process of claim 1 wherein said synthetic zeolite has been treated to replace original ions, at least in part, with an ion or mixture of ions selected from the group consisting of hydrogen, rare earth metals, and metals of Groups IIA, IIIA, IVA, IB, IIB, IIIB, IVB, VIB and VIII of the Periodic Table.
- 7. The process of claim 1 wherein said synthetic zeolite has been thermally treated at a temperature of up to about 925.degree. C.
- 8. The process of claim 1 wherein the waxy hydrocarbon feedstock contains paraffins.
- 9. The process of claim 1 wherein the waxy hydrocarbon feedstock is selected from the group consisting of whole crude petroleum, gas oil, cycle oil, catalytic cracker tower bottoms, and a heavy oil fraction having an initial boiling point of 450.degree. F. or higher.
- 10. The process of claim 1 wherein the hydroisomerization conditions include a temperature of from about 480.degree. F. to 930.degree. F., a pressure of from atmospheric to 3,600 psig, and a liquid hourly space velocity of from about 0.1 to about 20 hr.sup.-1.
- 11. The process of claim 5 wherein X comprises boron.
- 12. The process of claim 1 wherein the synthetic zeolite has an Alpha Value of about 5 or less.
- 13. The process of claim 1 wherein said catalyst composition comprises a binder selected from the group consisting of silica, magnesia, zirconia, thoria, beryllia, titania and mixtures thereof.
- 14. The process of claim 1 wherein said catalyst comprises one or more noble metals.
- 15. The process of claim 14 wherein said noble metals are selected from the group consisting of platinum and palladium.
- 16. The process of claim 1 wherein said waxy hydrocarbon feedstock is dewaxed in the presence of hydrogen.
- 17. The process of claim 1 wherein the hydrocarbon feedstock is a vaccum tower residua, deasphalted residua or a vacuum gas oil.
- 18. A process for improving lubricant properties of a waxy hydrocarbon feedstock, said process comprising contacting said feedstock with a catalyst composition in the presence of hydrogen under hydroisomerization conditions, said catalyst composition comprising a synthetic zeolite containing boron, having an Alpha Value of 10 or less, and an X-ray diffraction pattern including values substantially as set forth in Table A of the specification, said catalyst having been treated to contain a noble metal selected from the group consisting of platinum and palladium, wherein the hydroisomerization conditions include a temperature of from about 650.degree. F. to about 800.degree. F. and a pressure of about 200 to about 1200 psig.
- 19. The process of claim 18 wherein said hydroisomerization conditions include a temperature of from about 650.degree. F. to about 765.degree. F.
- 20. The process of claim 18 wherein said hydroisomerization conditions include a temperature of from about 730.degree. F. to about 780.degree. F. and a pressure of from about 400 psig to about 800 psig.
- 21. The process of claim 18 wherein said catalyst composition comprises a binder selected from the group consisting of silica, magnesia, zirconia, thoria, beryllia, titania and mixtures thereof.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of U.S. patent application Ser. No. 254,524, filed Oct. 6, 1988, now U.S. Pat. No. 4,954,325, which is a continuation-in-part of U.S. patent application Ser. No. 98,176, filed Sept. 18, 1987, now abandoned, which is a continuation-in-part of U.S. patent application Ser. No. 890,268 filed July 29, 1986, now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (2)
Number |
Date |
Country |
231860 |
Dec 1987 |
EPX |
293032 |
Nov 1988 |
EPX |
Continuation in Parts (3)
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Number |
Date |
Country |
Parent |
254524 |
Oct 1988 |
|
Parent |
98176 |
Sep 1987 |
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Parent |
890268 |
Jul 1986 |
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