Claims
- 1. A process of upgrading a catalytically cracked, olefinic sulfur-containing feed fraction boiling in the gasoline boiling range and having a 95 percent point of at least 325.degree. F., which comprises:
- contacting the catalytically cracked, olefinic sulfur-containing feed fraction with a hydrodesulfurization catalyst in a first reaction zone, operating under a combination of elevated temperature, elevated pressure and an atmosphere comprising hydrogen, to produce an intermediate product comprising a normally liquid fraction which has a reduced sulfur content and a reduced octane number as compared to the feed;
- contacting at least the gasoline boiling range portion of the intermediate product in a second reaction zone with an acidic catalyst comprising a porous crystalline material having an X-ray diffraction pattern with the following lines:
- ______________________________________Interplanar d-Spacing (A) Relative Intensity, I/I.sub.o .times. 100______________________________________12.36 .+-. 0.4 M-VS11.03 .+-. 0.2 M-S8.83 .+-. 0.14 M-VS6.18 .+-. 0.12 M-VS6.00 .+-. 0.10 W-M4.06 .+-. 0.07 W-S3.91 .+-. 0.07 M-VS3.42 .+-. 0.06 VS______________________________________
- to convert it to a product comprising a fraction boiling in the gasoline boiling range having a higher octane number than the gasoline boiling range fraction of the intermediate product.
- 2. A process according to claim 1 in which the porous crystalline material has an X-ray diffraction pattern including the following lines:
- ______________________________________Interplanar d-Spacing (A) Relative Intensity, I/I.sub.o .times. 100______________________________________30.0 .+-. 2.2 W-M22.1 .+-. 1.3 W12.36 .+-. 0.4 M-VS11.03 .+-. 0.2 M-S8.83 .+-. 0.14 M-VS6.18 .+-. 0.12 M-VS6.00 .+-. 0.10 W-M4.06 .+-. 0.07 W-S3.91 .+-. 0.07 M-VS3.42 .+-. 0.06 VS______________________________________
- 3. A process according to claim 1 in which the porous crystalline material comprises MCM-22.
- 4. The process as claimed in claim 1 in which said feed fraction comprises a light naphtha fraction having a boiling range within the range of C.sub.6 to 330.degree. F.
- 5. The process as claimed in claim 1 in which said feed fraction comprises a full range naphtha fraction having a boiling range within the range of C.sub.5 to 420.degree. F.
- 6. The process as claimed in claim 1 in which said feed fraction comprises a heavy naphtha fraction having a boiling range within the range of 330.degree. to 500.degree. F.
- 7. The process as claimed in claim 1 in which said feed fraction comprises a heavy naphtha fraction having a boiling range within the range of 330.degree. to 412.degree. F.
- 8. The process as claimed in claim 1 in which said feed fraction comprises a naphtha fraction having a 95 percent point of at least about 350.degree. F.
- 9. The process as claimed in claim 8 in which said feed fraction comprises a naphtha fraction having a 95 percent point of at least about 380.degree. F.
- 10. The process as claimed in claim 9 in which said feed fraction comprises a naphtha fraction having a 95 percent point of at least about 400.degree. F.
- 11. The process as claimed in claim 1 in which the porous crystalline material comprises MCM-22 in the aluminosilicate form.
- 12. The process as claimed in claim 1 in which the hydrodesulfurization is carried out at a temperature of about 400.degree. to 800.degree. F., a pressure of about 50 to 1500 psig, a space velocity of about 0.5 to 10 LHSV, and a hydrogen to hydrocarbon ratio of about 500 to 5000 standard cubic feet of hydrogen per barrel of feed.
- 13. The process as claimed in claim 12 in which the hydrodesulfurization is carried out at a temperature of about 500.degree. to 750.degree. F., a pressure of about 300 to 1000 psig, a space velocity of about 1 to 6 LHSV, and a hydrogen to hydrocarbon ratio of about 1000 to 2500 standard cubic feet of hydrogen per barrel of feed.
- 14. The process as claimed in claim 1 in which the second stage upgrading is carried out at a temperature of about 300.degree. to 900.degree. F., a pressure of about 50 to 1500 psig, a space velocity of about 0.5 to 10 LHSV, and a hydrogen to hydrocarbon ratio of about 0 to 5000 standard cubic feet of hydrogen per barrel of feed.
- 15. The process as claimed in claim 14 in which the second stage upgrading is carried out at a temperature of about 350.degree. to 800.degree. F., a pressure of about 300 to 1000 psig, a space velocity of about 1 to 6 LHSV, and a hydrogen to hydrocarbon ratio of about 100 to 2500 standard cubic feet of hydrogen per barrel of feed.
- 16. The process as claimed in claim 1 which is carried out in two stages with an interstage separation of light ends and heavy ends with the heavy ends fed to the second reaction zone.
- 17. A process of upgrading a catalytically cracked, olefinic sulfur-containing feed fraction boiling in the gasoline boiling range which comprises:
- hydrodesulfurizing a catalytically cracked, olefinic, sulfur-containing gasoline feed having a sulfur content of at least 50 ppmw, an olefin content of at least 5 percent and a 95 percent point of at least 325.degree. F. with a hydrodesulfurization catalyst in a hydrodesulfurization zone, operating under a combination of elevated temperature, elevated pressure and an atmosphere comprising hydrogen, to produce an intermediate product comprising a normally liquid fraction which has a reduced sulfur content and a reduced octane number as compared to the feed;
- contacting at least the gasoline boiling range portion of the intermediate product in a second reaction zone with a catalyst of acidic functionality comprising the aluminosilicate form of MCM-22 to convert it to a product comprising a fraction boiling in the gasoline boiling range having a higher octane number than the gasoline boiling range fraction of the intermediate product.
- 18. The process as claimed in claim 15 in which the feed fraction has a 95 percent point of at least 350.degree. F., an olefin content of 10 to 20 weight percent, a sulfur content from 100 to 5,000 ppmw and a nitrogen content of 5 to 250 ppmw.
- 19. The process as claimed in claim 18 in which said feed fraction comprises a naphtha fraction having a 95 percent point of at least about 380.degree. F.
- 20. The process as claimed in claim 17 in which the hydrodesulfurization is carried out at a temperature of about 500.degree. to 800 .degree. F., a pressure of about 300 to 1000 psig, a space velocity of about 1 to 6 LHSV, and a hydrogen to hydrocarbon ratio of about 1000 to 2500 standard cubic feet of hydrogen per barrel of feed.
- 21. The process as claimed in claim 20 in which the second stage upgrading is carried out at a temperature of about 350.degree. to 800.degree. F., a pressure of about 300 to 1000 psig, a space velocity of about 1 to 6 LHSV, and a hydrogen to hydrocarbon ratio of about 100 to 2500 standard cubic feet of hydrogen per barrel of feed.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of prior application Ser. No. 07/745,311, filed Aug. 15, 1991 and of prior application Ser. No. 07/850,106, filed Mar. 12, 1992, which, in turn, is a continuation-in-part of prior application Ser. No. 07/745,311, filed Aug. 15, 1991 all pending.
US Referenced Citations (27)
Continuation in Parts (2)
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Number |
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745311 |
Aug 1991 |
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Parent |
745311 |
Aug 1991 |
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