Titania-bound zeolite EU-2 composition and method of making and using such composition
View Patent ↗Catalyst composition useful in the catalytic dewaxing of a waxy hydrocarbon feedstock which catalyst composition includes a mixture of zeolite EU-2 and titania and may further include a noble metal. The zeolite EU-2 has a molar bulk ratio of silica-to-alumina (SAR) of greater than 100:1. The zeolite or mixture may have been dealuminated such as by acid leaching using a fluorosilicate salt or by steam treating.
1. A catalyst composition comprising a mixture comprising titania and zeolite EU-2 having a molar bulk ratio of silica-to-alumina (SAR) of greater than 115:1; wherein said zeolite EU-2 is present in said composition in an amount of at least 10 wt. % and at most 60% wt and said titania is present in said composition in an amount of no more than 90% wt, with such % wt being based on the dry weight of said composition; and wherein said titania has a high surface area greater than 105 m 2 /gm.
2. A catalyst composition as recited in claim 1 , further comprising a noble metal selected from the group consisting of platinum and palladium.
3. A catalyst composition as recited in claim 1 , wherein said mixture contains zeolite EU-2 particles of which the average aluminum concentration is at least 1.1 times the aluminum concentration at the surface of the EU-2 particles.
4. A catalyst composition as recited in claim 1 , wherein said catalyst composition is substantially free of silica other than the silica contained in said zeolite EU-2 framework.
5. A catalyst composition as recited in claim 1 , wherein said catalyst composition is substantially free of alumina other than the alumina contained in said zeolite EU-2 framework.
6. A catalyst composition as recited in claim 1 , wherein said zeolite EU-2 has a molar bulk ratio of silica-to-alumina greater than 120:1 and said titania has a B.E.T. surface area greater than 125 m 2 /gm.
7. A catalyst composition as recited in claim 1 , wherein more than 60 wt % of said titania is in the form of anatase titania.
8. A catalyst composition as recited in claim 1 , wherein said zeolite EU-2 content of said composition is at least 25 wt % and at most 55 wt % and the titania content of said composition is at least 30 wt % and no more than 75 wt %.
9. A catalyst composition as recited in claim 1 , wherein said zeolite EU-2 has a molar bulk ratio of silica-to-alumina greater than 130:1 and said titania has a B.E.T. surface area greater than 150 m 2 /gm.
10. A catalyst composition as recited in claim 1 , wherein said zeolite EU-2 content of said composition is at least 30 wt % and at most 60 wt % and the titania content of said composition is at least 40 wt % and at most 90 wt %.
11. A catalyst composition as recited in claim 1 , further comprises a noble metal selected from the group consisting of platinum and palladium; and wherein said zeolite EU-2 has a molar bulk ratio of silica-to-alumina greater than 130:1 and less than 500:1; said titania has a B.E.T. surface area greater than 175 m 2 /gm and less than 700 m 2 /gm; said zeolite EU-2 content of said composition is at least 10 wt % and at most 55 wt %; and said titania content of said composition is at least 45 wt % and no more than 70wt % of said composition.
12. A catalyst composition as recited in claim 11 , wherein said titania includes more than 60 wt % titania in the anatase form and less than 40 wt % in the rutile form.
13. A method for preparing said catalyst composition of claim 1 , wherein said method comprises: preparing a mixture comprising at least 40 wt. % and no more than 80 wt. % titania, having a high surface area greater than 105 m 2 /gm, ant at most 60wt. % zeolite EU-2 having a molar bulk ratio of silica-to-alumina (SAR) of greater than 115:1 and forming said mixture into a particle.
14. A method as recited in claim 13 , further comprising: drying and calcining said particle to thereby provide a calcined particle.
15. A method as recited in claim 14 , further comprising: subjecting said calcined particle to dealumination to thereby provide a dealuminated particle comprising dealuminated zeolite.
16. A method as recited in claim 15 , further comprising:
incorporating a noble metal into said dealuminated particle to thereby provide a catalyst composition comprising zeolite EU-2, titania and said noble metal.
17. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 1 .
18. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 2 .
19. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 3 .
20. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 4 .
21. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 5 .
22. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 6 .
23. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 7 .
24. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 8 .
25. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 9 .
26. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 10 .
27. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 11 .
28. A process for the catalytic dewaxing of a hydrocarbon oil feed, wherein said process comprises: contacting under catalytic dewaxing conditions said hydrocarbon oil feed with the catalyst composition of claim 12 .