Claims
- 1. A process for producing a high viscosity index lubricant having a viscosity index of at least 125 from a petroleum wax feed having a paraffin content or at least 40 weight percent, which comprises isomerizing waxy paraffins present in the feed to less waxy isoparaffins in the presence of hydrogen partial pressure of at least 1000 psig and in the presence of a low acidity isomerization catalyst, the catalyst comprising a porous support material which is loaded with a noble metal hydrogenation component, the support material comprising zeolite beta, the zeolite beta having an alpha value of not more than 20 and an isomerization selectivity of no less than 48%.
- 2. The process according to claim 1 in which the feed comprises a petroleum wax having a wax content of at least 60 weight percent and an aromatic content of from 5 to 20 weight percent.
- 3. A process according to claim 2 in which the isomerization catalyst comprises a boron-containing zeolite beta isomerization catalyst in which the boron is present as a framework component of the zeolite beta.
- 4. A process according to claim 3 in which the isomerization catalyst comprises from 0.5 to 2 weight percent platinum on a support comprising boron-containing zeolite beta containing boron as a framework component of the zeolite beta and a matrix.
- 5. A process according to claim 1 in which the hydroisomerization is carried out at a hydrogen partial pressure of from 1000 to 2500 psig.
- 6. A process according to claim 1 in which the isomerization step is carried out in the presence of hydrogen at a conversion to 650° F.− product of not more than 30 weight percent, based on the feed to the isomerization step.
- 7. A process according to claim 6 in which the 650° F.− conversion during the isomerization step is from 10 to 20 weight percent based on the feed to the isomerization step.
- 8. A process according to claim 6 in which the isomerization step is carried out at a temperature not greater than 800° F.
- 9. A process according to claim 8 in which the isomerization step is carried out at a temperature from 600° to 800° F.
- 10. A process according to claim 1 in which the hydroisomerized product is subjected to a dewaxing to achieve a target pour point, with a loss during the dewaxing of not more than 15 weight percent.
- 11. A process according to claim 1 in which the product has a VI of 130 to 150.
- 12. A process according to claim 1 in which the feed comprises a de-oiled wax, a slack wax Fischer-Tropsch Wax a Hydrocracked Heavy Neutral Slack Wax, or a solvent-refined raffinate.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation in part application of Ser. No. 09/115,255, filed Jul. 13, 1998 now abandoned.
US Referenced Citations (2)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09/115255 |
Jul 1998 |
US |
Child |
09/439666 |
|
US |