US3891540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination operation to maximize fuel oil product of low pour
Assignee: Mobil Oil AS
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Filing: 1974-04-02
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Granted: 1975-06-24
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Expires: 1994-04-02
Abstract
Abstract A combination operation is described comprising catalytic cracking and ZSM-5 type crystalline aluminosilicate catalyst upgrading of light fuel oil product under selected conditions designed to particularly increase the yield of light fuel oil product of desired low pour point.
Inventors
- 👤 Edward J Demmel
- 👤 Donald M Nace
- 👤 Hartley Owen
- 👤 Edward J Rosinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:12
CPC Classifications
C; C10; C10G; C10G69/00; C10G69/02; C10G69/04; C10G11/00; C10G11/14; C10G11/18; C10G2400/00; C10G2400/06; Y; Y10; Y10S; Y10S208/00; Y10S208/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
171 words
A METHOD FOR IMPROVING THE YIELD OF LOW POUR LIGHT FUEL OIL PRODUCT WHICH COMPRISES, CATALYTICALLY CRACKING A MIXTURE COMPRISING FRESH GAS OIL FEED AND HEAVY CYCLE OIL PRODUCT OF CRACKING IN A FIRST CONVERSION ZONE UNDER CONDITIONS SELECTED TO RESTRICT CONVERSION TO LESS THAN 45 VOLUME PERCENT SEPARATING THE PRODUCT OF SAID FIRST CONVERSION ZONE TO RECOVER GASOLINE AND LOWER BOILING COMPONENTS FROM A LIGHT FUEL OIL FRACTION, AN INTERMEDIATE CYCLE OIL FRACTION AND A HEAVY CYCLE OIL FRACTION, RECYCLING THE HEAVY CYCLE OIL FRACTION TO SAID FIRST CONVERSION ZONE, PASSING THE INTERMEDIATE CYCLE OIL FRACTION TO A SECOND CONVERSION ZONE AND RESTRICTING CATALYTIC CONVERSION THEREOF TO INCREASE THE YIELD OF DESIRED LIGHT FUEL OIL, SEPARATING THE PRODUCT OF THE INTERMEDIATE CYCLE OIL CONVERSION OPERATION TO RECOVER GASOLINE AND LOWER BOILING COMPONENTS FROM LIGHT FUEL OIL AND HIGHER BOILING CYCLE OIL AND REDUCING THE POUR POINT OF THE LIGHT FUEL OIL FRACTION OF THE COMBINATION CATALYSTIC CRACKING OPERATION BY CONTACTING IT WITH A ZSM-5 TYPE CRYSTALLINE ZEOLITE UNDER HYDRODEWAXING CONDITIONS.
Claim 2
Independent Claim
171 words
A METHOD FOR IMPROVING THE YIELD OF LOW POUR LIGHT FUEL OIL PRODUCT WHICH COMPRISES, CATALYTICALLY CRACKING A MIXTURE COMPRISING FRESH GAS OIL FEED AND HEAVY CYCLE OIL PRODUCT OF CRACKING IN A FIRST CONVERSION ZONE UNDER CONDITIONS SELECTED TO RESTRICT CONVERSION TO LESS THAN 45 VOLUME PERCENT SEPARATING THE PRODUCT OF SAID FIRST CONVERSION ZONE TO RECOVER GASOLINE AND LOWER BOILING COMPONENTS FROM A LIGHT FUEL OIL FRACTION, AN INTERMEDIATE CYCLE OIL FRACTION AND A HEAVY CYCLE OIL FRACTION, RECYCLING THE HEAVY CYCLE OIL FRACTION TO SAID FIRST CONVERSION ZONE, PASSING THE INTERMEDIATE CYCLE OIL FRACTION TO A SECOND CONVERSION ZONE AND RESTRICTING CATALYTIC CONVERSION THEREOF TO INCREASE THE YIELD OF DESIRED LIGHT FUEL OIL, SEPARATING THE PRODUCT OF THE INTERMEDIATE CYCLE OIL CONVERSION OPERATION TO RECOVER GASOLINE AND LOWER BOILING COMPONENTS FROM LIGHT FUEL OIL AND HIGHER BOILING CYCLE OIL AND REDUCING THE POUR POINT OF THE LIGHT FUEL OIL FRACTION OF THE COMBINATION CATALYSTIC CRACKING OPERATION BY CONTACTING IT WITH A ZSM-5 TYPE CRYSTALLINE ZEOLITE UNDER HYDRODEWAXING CONDITIONS.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein conversion of the intermediate cycle oil fraction is restricted to less than 30 volume percent.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein conversion of the hydrocarbon feeds is accomplished with a catalyst of restricted activity within the range of 20-40 FAI.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein limited cracking of the intermediate cycle oil is accomplished in the presence of naphtha.
Claim 6
Dependent Claim
35 words
The method of claim 1 wherein the recovered light fuel oil product of the cracking operation boils in the range of from about 320*F. up to about 700*F. at its 90 percent ASTM distillation point.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein a faujasite conversion catalyst of restricted activity is employed in each of said conversion zones.
Claim 8
Dependent Claim
30 words
The method of claim 6 wherein the faujasite conversion catalyst is combined with from 1 to 10 weight percent of a ZSM-5 type or a mordenite type of crystalline zeolite.
Claim 9
Dependent Claim
30 words
The method of claim 1 wherein ZSM-5 type crystalline zeolite is cascaded from the ZSM-5 hydrodewaxing operation to the cracking operation at intervals when regeneration of ZSM-5 catalyst is required.
Claim 10
Dependent Claim
34 words
The method of claim 1 wherein freshly regenerated catalyst is passed to each conversion zone and the ratio to catalyst to oil in the first conversion zone is about 6 based on fresh feed.
Claim 11
Dependent Claim
54 words
The method of claim 1 wherein the hydrodewaxing operation is accomplished at a temperature within the range of 500* to 900*F. and cracking of the fresh and recycle oils charged to the first conversion zone is accomplished at a temperature below 950*F. in a riser conversion zone providing a relatively short hydrocarbon residence time.
Claim 12
Independent Claim
109 words
A method for converting high boiling hydrocarbons to light fuel oil product which comprises, converting relatively high boiling hydrocarbon materials and recycle conversion products thereof higher boiling than a desired light fuel oil product with a faujasite containing crystalline zeolite cracking catalyst of 20 to 40 FAI activity under conditions restricting fresh feed conversion to less than 45 volume Percent, separating a light fuel oil product of conversion from a gasoline product with a boiling point of about 700*F. at its 90 percent ASTM distillation point, and reducing the pour point of said desired light fuel oil product by contact with a ZSM-5 type crystalline zeolite under hydrodewaxing conditions.
Claim 13
Independent Claim
109 words
A method for converting high boiling hydrocarbons to light fuel oil product which comprises, converting relatively high boiling hydrocarbon materials and recycle conversion products thereof higher boiling than a desired light fuel oil product with a faujasite containing crystalline zeolite cracking catalyst of 20 to 40 FAI activity under conditions restricting fresh feed conversion to less than 45 volume Percent, separating a light fuel oil product of conversion from a gasoline product with a boiling point of about 700*F. at its 90 percent ASTM distillation point, and reducing the pour point of said desired light fuel oil product by contact with a ZSM-5 type crystalline zeolite under hydrodewaxing conditions.
Claim 14
Dependent Claim
34 words
The method of claim 11 wherein a crystalline zeolite of the class selected from a ZSM-5 type crystalline material or a mordenite type of crystalline material is in admixture with said faujasite crystalline zeolite.
Claim 15
Dependent Claim
33 words
The method of claim 11 wherein an intermediate cycle oil boiling between said desired light fuel oil product and a heavier cycle oil product is separately converted to desired light fuel oil product.
Claim 16
Dependent Claim
32 words
The method of claim 13 wherein a fresh gas oil feed and a higher boiling recycle product of conversion are converted in a zone separate from the intermediate cycle oil conversion zone.
Claim 17
Dependent Claim
31 words
The method of claim 14 wherein the fresh gas oil feed is converted in a zone separate from a conversion zone for the intermediate cycle oil and higher boiling recycle product.
Claim 18
Dependent Claim
25 words
The method of claim 11 wherein the desired light fuel oil product has an initial boiling point within the range of 320*F. to about 400*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |