Claims
- 1. A process for hydrocracking and dewaxing a heavy hydrocarbon vacuum gas oil having an initial boiling point above 650.degree. F. comprising high molecular weight long chain, waxy paraffins and high molecular weight aromatics including fused ring aromatics,
- which process comprises contacting the oil with a catalyst comprising (i) zeolite beta as an acidic component and (ii) a hydrogenation component at a temperature of 230.degree. C. to 500.degree. C. and in the presence of hydrogen gas at a total pressure of 500 to 20,000 kPa, a space velocity of 0.1 to 10 LHSV and a hydrogen circulation rate of 10 to 3500 n.1.1..sup.-1 to bring about a bulk conversion including hydrocracking of aromatic components simultaneously with a conversion of the long chain waxy paraffins present in the feed and produced by the hydrocracking reactions to effect a dewaxing of the feed simultaneously with the hydrocracking so that the pour point of the fraction of the product boiling above 650.degree. F. is reduced relative to the pour point of the feed.
- 2. A process according to claim 1 in which the hydrogenation component comprises nickel, tungsten, cobalt, molybdenum or mixtures of these metals.
- 3. A process according to claim 2 in which the hydrogenation component comprises nickel and tungsten.
- 4. A process according to claim 2 in which the hydrogenation component comprises platinum, palladium or combinations of them.
- 5. A process according to claim 1 in which the vacuum gas oil has an end point of up to about 1050.degree. F.
- 6. A process according to claim 1 in which the vacuum gas oil has an end point of up to about 950.degree. F.
- 7. A process according to claim 1 in which the vacuum gas oil has a pour point of about 40.degree. C.
- 8. A process according to claim 1 in which the oil is subjected to hydrotreating before the hydrocracking.
REFERENCE TO RELATED APPLICATION
This application is a division of co-pending application Ser. No. 07/675,124, filed Mar. 25, 1991, now U.S. Pat. No. 5,128,024. Ser. No. 07/675,124 was a continuation of Ser. No. 07/544,792, filed Jun. 29, 1990 now abandoned, which was a continuation of Ser. No. 07/383,700, filed Jul. 24, 1989, now abandoned, which was a continuation of Ser. No. 06/379,421, filed May 18, 1982, now abandoned.
US Referenced Citations (9)
Non-Patent Literature Citations (1)
Entry |
Frillette et al., Catalysis by Crystalline Aluminosilicates. Constraint Index. Journal of Catalysis 67, 218-222 (1981). |
Divisions (1)
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Number |
Date |
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675124 |
Mar 1991 |
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Continuations (3)
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544792 |
Jun 1990 |
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Parent |
383700 |
Jul 1989 |
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Parent |
379421 |
May 1982 |
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