Patent US4280925A successfully refreshed from Google Patents.
Patent US3894931A successfully refreshed from Google Patents.
US3894931A
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Method for improving olefinic gasoline product of low conversion fluid catalytic cracking
Assignee: Mobil Oil AS
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Filing: 1974-04-02
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Granted: 1975-07-15
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Expires: 1994-04-02
Abstract
Abstract A combination operation is described for the production of fuel oil comprising a low conversion cracking operation in the presence of a zeolite conversion catalyst in combination with cyclization of olefin rich feed to produce a combination of products comprising isobutane, gasoline boiling range aromatics and higher boiling material suitable for blending with the light fuel oil product. Isobutylene dimerization and cyclization with a faujasite crystalline zeolite conversion catalyst is described.
Inventors
- 👤 Donald M Nace
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:37
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C07; C07C; C07C2/00; C10G11/02; C10G11/04; C10G11/05; C10G45/00; C10G45/58; C10G45/60; C10G45/64; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08; C07C2529/18; C07C2529/40; C07C2529/80
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
A METHOD FOR OIMPROVING THE YIELD OF LIGHT FUEL OIL AND THE OCTANE RATING OF GASOLINE SIMULTANEOUSLY PRODUCED IN THE OPERATION WHICH COMPRISES, CONVERTING A RELATIVELY HIGH BOILING HYDROCARBON CHARGE MATERIAL TO A LOWER BOILING LIGHT FUEL OIL PRODUCT OF RELATIVELY HIGH POUR POINT BY CONTACTING THE HYDROCARBON CHARGE WITH A CRYSTALLINE ZEOLITE CRACKING CATALYST COMPRISING A FAUJASITE CONVERSION CATALYST UNDER TEMPERATURE PRESSURE, CATALYST/OIL RATIO AND HYDROCARBON RESIDENCE TIME SELECTED TO OBTAIN CONVERSION OF THE CHARGE TO LIGHT FUEL OIL IN AN AMOUNT EXCEEDING ABOUT 50 VOL. PERCENT BASED ON FRESH FEED ALONG WITH A HIGHLY OLEFINIC GASOLINE PRODUCT, REDUCING THE POUR POINT OF THE LIGHT FUEL OIL PRODUCT TO WITHIN THE RANGE OF -35*F. TO +30*F. BY CONTACT WITH A ZSM-5 CONTAINING CRYSTALLINE ZEOLITE CONVERSION CATALYST, CONTACTING AN OLEFIN RICH GASIFORM CHARGE WITH THE CRYSTAL-
Claim 2
Independent Claim
136 words
A METHOD FOR OIMPROVING THE YIELD OF LIGHT FUEL OIL AND THE OCTANE RATING OF GASOLINE SIMULTANEOUSLY PRODUCED IN THE OPERATION WHICH COMPRISES, CONVERTING A RELATIVELY HIGH BOILING HYDROCARBON CHARGE MATERIAL TO A LOWER BOILING LIGHT FUEL OIL PRODUCT OF RELATIVELY HIGH POUR POINT BY CONTACTING THE HYDROCARBON CHARGE WITH A CRYSTALLINE ZEOLITE CRACKING CATALYST COMPRISING A FAUJASITE CONVERSION CATALYST UNDER TEMPERATURE PRESSURE, CATALYST/OIL RATIO AND HYDROCARBON RESIDENCE TIME SELECTED TO OBTAIN CONVERSION OF THE CHARGE TO LIGHT FUEL OIL IN AN AMOUNT EXCEEDING ABOUT 50 VOL. PERCENT BASED ON FRESH FEED ALONG WITH A HIGHLY OLEFINIC GASOLINE PRODUCT, REDUCING THE POUR POINT OF THE LIGHT FUEL OIL PRODUCT TO WITHIN THE RANGE OF -35*F. TO +30*F. BY CONTACT WITH A ZSM-5 CONTAINING CRYSTALLINE ZEOLITE CONVERSION CATALYST, CONTACTING AN OLEFIN RICH GASIFORM CHARGE WITH THE CRYSTAL-
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein a low octane gasoline product simultaneously produced durIng said limited conversion cracking operation is octane improved by contact with a ZSM-5 crystalline zeolite in a separate contact zone.
Claim 4
Dependent Claim
81 words
The method of claim 1 wherein the high boiling hydrocarbon is a gas oil which is converted to a light cycle oil in a first riser reactor, the olefin rich charge is dimerized and cyclized in a second riser reactor in the presence of used catalyst separated from the first riser reactor and freshly regenerated catalyst is combined with the used catalyst to maintain a catalyst to oil ratio in the second riser reactor within the range of 40 to 80.
Claim 5
Dependent Claim
31 words
The method of claim 3 wherein the light cycle oil product of gas oil conversion and olefin dimerization is subjected to pour point reduction treatment with a ZSM-5 crystalline zeolite catalyst.
Claim 6
Dependent Claim
53 words
The method of claim 1 wherein dimerizing and cyclizing of the olefin feed is accomplished at a feed residence time within the range of 3 to 20 seconds, a catalyst to oil ratio within the range of 10 to 100 and a temperature restricted to within the range of 800*F. to about 900*F.
Claim 7
Dependent Claim
19 words
The method of claim 5 wherein the catalyst to oil ratio is within the range of 40 to 80.
Claim 8
Dependent Claim
29 words
The method of claim 1 wherein the faujasite cracking catalyst is admixed with a small amount of a crystalline zeolite selected from the group consisting of ZSM-5 and mordenite.
Claim 9
Dependent Claim
61 words
The method of claim 1 wherein the olefin rich feed is selected from the group consisting of isobutylene, a mixture of C3 and C4 olefins, a C5 and lower boiling stream rich in olefins, an olefin rich stream boiling in the range of C6 to 320*F. or a mixture of two or more of the olefin rich feeds comprising the group.
Claim 10
Dependent Claim
32 words
The method of claim 3 wherein dimerization of olefinic constituents produces a product comprising toluene and xylene which is available for blending with the gasoline product of the gas oil conversion operation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |