Claims
- 1. In the process of dewaxing gas oil which comprises contacting such at an elevated temperature with an aluminosilicate zeolite catalyst having a silica to alumina ratio of at least about 12, a constraint index of about 1 to 12 and a crystal density of not substantially below about 1.6 grams per cubic centimeter whereby to reduce the pour point of said gas oil; the improvement which comprises utilizing a catalyst comprising said zeolite having at least one multi valent transition metal and at least one Group VIII noble metal incorporated therewith.
- 2. The improved process claimed in claim 1 including operating under hydrogen pressure.
- 3. The improved process claimed in claim 1 wherein at least one multi valent transition metal is present in a proportion up to about 2.0 weight percent, at least one Group VIII noble metal is present in a proportion up to about 2.0 weight percent, and both at least one multi valent transition metal and at least one Group VIII noble metal are present in a cumulative proportion up to about 4.0 weight percent all based upon the weight of the zeolite.
- 4. The improved process claimed in claim 1 wherein said zeolite is ZSM-5.
- 5. The improved process claimed in claim 1 wherein said multi valent transition metal is zinc or cadmium.
- 6. The improved process claimed in claim 1 wherein said Group VIII transition metal is platinum palladium or iridium.
- 7. The improved process claimed in claim 1 wherein said multi valent transition metal is zinc or said Group VIII noble transition metal is palladium.
RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 539,655 filed Jan. 9, 1975 (now abandoned).
US Referenced Citations (7)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
539655 |
Jan 1975 |
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