US3894936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of hydrocarbons with {37 Y{38 {0 faujasite-type catalysts
Assignee: Mobil Oil AS
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Filing: 1973-11-19
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Granted: 1975-07-15
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Expires: 1993-11-19
Abstract
Abstract A FCC operation is described for separately converting with faujasite conversion catalyst, a gas oil feed material and a C3C4 rich hydrocarbon fraction. Conversion of the gas oil is accomplished in a normal riser reactor and conversion of the C3C4 rich hydrocarbons is accomplished with catalyst separated from the gas oil riser reactor in a restricted riser reactor confined within the catalyst collecting zone about the discharge end of the gas oil riser.
Inventors
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
196 words
A METHOD FOR UPGRADING HYDROCARBONS WITH A FAUJASITE CRYSTALLINE ZEOLITE CONVERSION CATALYST WHICH COMPRISES, PASSING A SUSPENSION OF FAUJASITE ZEOLITE CONVERSION CATALYST DISPERSED IN A HIGH BOILING HYDROCARBON FRACTION AT A TEMPERATURE WITHIN THE RANGE OF 950*F. TO ABOUT 1,100*F. UPWARDLY THROUGH A FIRST RISER CONVERSION ZONE AT A HYDROCARBON RESIDENCE TIME WITHIN THE RANGE OF 2 TO 10 SECONDS, DISCHARGING THE SUSPENSION FROM SAID FIRST CONVERSION ZONE INTO A SEPARATION ZONE ABOVE A FLUID BED OF CATALYST AND PASSING SEPARATED CATALYST INTO SAID FLUID BED, MIXING CATALYST PARTICLES IN AN UPPER PORTION OF SAID FLUID BED OF CATALYST WITH A HYDROCARBON FEED RICH IN C4 AND LOWER BOILING HYDROCARBONS TO FORM A SECOND SUSPENSION AT A TEMPERATURE IN THE RANGE OF 700* TO 1,050*F., PASSING THE SECOND SUSPENSION COMPRISING C4 HYDROCARBONS UPWARDLY THROUGH A SECOND RISER CONVERSION ZONE EXTENDING FROM AN UPPER PORTION OF SAID FLUID BED OF CATALYST INTO THE UPPER PORTION OF A CATALYST-HYDROCARBON VAPOR SEPARATION ZONE, SAID SECOND SUSPENSION MAINTAINED AT A TEMPERATURE, SPACE VELOCITY AND CATALYST/HYDROCARBON RATIO SELECTED TO CONVERT THE C4 AND LIGHTER HYDROCARBONS TO FORM AROMATICS, SEPARATING HYDROCARBON CONVERSION PRODUCTS AND CATALYST UPON DISCHARGE FROM SAID SECOND CONVERSION ZONE,
Claim 2
Independent Claim
196 words
A METHOD FOR UPGRADING HYDROCARBONS WITH A FAUJASITE CRYSTALLINE ZEOLITE CONVERSION CATALYST WHICH COMPRISES, PASSING A SUSPENSION OF FAUJASITE ZEOLITE CONVERSION CATALYST DISPERSED IN A HIGH BOILING HYDROCARBON FRACTION AT A TEMPERATURE WITHIN THE RANGE OF 950*F. TO ABOUT 1,100*F. UPWARDLY THROUGH A FIRST RISER CONVERSION ZONE AT A HYDROCARBON RESIDENCE TIME WITHIN THE RANGE OF 2 TO 10 SECONDS, DISCHARGING THE SUSPENSION FROM SAID FIRST CONVERSION ZONE INTO A SEPARATION ZONE ABOVE A FLUID BED OF CATALYST AND PASSING SEPARATED CATALYST INTO SAID FLUID BED, MIXING CATALYST PARTICLES IN AN UPPER PORTION OF SAID FLUID BED OF CATALYST WITH A HYDROCARBON FEED RICH IN C4 AND LOWER BOILING HYDROCARBONS TO FORM A SECOND SUSPENSION AT A TEMPERATURE IN THE RANGE OF 700* TO 1,050*F., PASSING THE SECOND SUSPENSION COMPRISING C4 HYDROCARBONS UPWARDLY THROUGH A SECOND RISER CONVERSION ZONE EXTENDING FROM AN UPPER PORTION OF SAID FLUID BED OF CATALYST INTO THE UPPER PORTION OF A CATALYST-HYDROCARBON VAPOR SEPARATION ZONE, SAID SECOND SUSPENSION MAINTAINED AT A TEMPERATURE, SPACE VELOCITY AND CATALYST/HYDROCARBON RATIO SELECTED TO CONVERT THE C4 AND LIGHTER HYDROCARBONS TO FORM AROMATICS, SEPARATING HYDROCARBON CONVERSION PRODUCTS AND CATALYST UPON DISCHARGE FROM SAID SECOND CONVERSION ZONE,
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein a high boiling hydrocarbon is added at intervals to the suspension passing through the first conversion zone.
Claim 4
Dependent Claim
43 words
The process of claim 1 wherein high boiling hydrocarbon and gasiform dispersant are mixed with hot regenerated catalyst in an annular mixing zone to form a suspension thereof which is thereafter passed upwardly through said first riser conversion zone under hydrocarbon conversion conditions.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein said high boiling hydrocarbon fraction is a hydrogenated material of at least gas oil boiling range.
Claim 6
Dependent Claim
33 words
The process of claim 1 wherein said C4 and lower boiling hydrocarbons comprise a fraction rich in C3 and C4 hydrocarbons which are converted to aromatics and isobutane in said second conversion zone.
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein the residence time of the low boiling hydrocarbons in the second conversion zone is restricted to within the range of 4 to 10 seconds.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein the catalyst to hydrocarbon ratio in the second conversion zone is controlled in response to relatively inert gasiform material combined with said low boiling hydrocarbon feed.
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) | 1978-07-14 | 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 |