Patent US3894935A successfully refreshed from Google Patents.
US3894935A
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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 The fluid catalytic cracking of a gas oil and a C3-C4 rich fraction in separate conversion zones in the presence of a faujasite conversion catalyst is described wherein freshly regenerated catalyst may be employed in each separate conversion zone or it may be cascaded from the gas oil conversion zone to the conversion zone for the C3-C4 rich feed.
Inventors
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:58
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
IN A PROCESS FOR CONVERTING HYDROCARBONS IN THE PRESENCE OF A FAUJASITE CATALYST, THE IMPROVEMENT WHICH COMPRISES PASSING A FLUID PARTICLE SIZE FAUJASITE CONVERSION CATALYST AT AN ELEVATED CONVERSION TEMPERATURE TO THE LOWER PORTION OF EACH OF TWO SEPARATE RISER CONVERSION ZONES, PASSING A HIGH BOILING GAS OIL HYDROCARBON FRACTION AS FEED TO THE LOWER PORTION OF ONE OF SAID RISER CONVERSION ZONES UNDEER CONDITIONS TO FORM A CATALYST/OIL SUSPENSION IN THE RAGE OF 4-20/1 AT A TEMPERATURE OF AT LEAST 950*F. WHICH IS PASSED THROUGH SAID RISER CONVERSION ZONE, PASSING A LOW BOILING HYDROCARBON FRACTION RICH IN C3 AND C4 HYDROCARBON TO THE OTHER OF SAID RISER CONVERSION ZONES UNDER CONDITIONS TO FORM A CATALYST/HYDROCARBON SUSPENSION AT A TEMPERATURE IN THE RANGE OF 700*F. TO 1100*F
Claim 2
Dependent Claim
127 words
IN A PROCESS FOR CONVERTING HYDROCARBONS IN THE PRESENCE OF A FAUJASITE CATALYST, THE IMPROVEMENT WHICH COMPRISES PASSING A FLUID PARTICLE SIZE FAUJASITE CONVERSION CATALYST AT AN ELEVATED CONVERSION TEMPERATURE TO THE LOWER PORTION OF EACH OF TWO SEPARATE RISER CONVERSION ZONES, PASSING A HIGH BOILING GAS OIL HYDROCARBON FRACTION AS FEED TO THE LOWER PORTION OF ONE OF SAID RISER CONVERSION ZONES UNDEER CONDITIONS TO FORM A CATALYST/OIL SUSPENSION IN THE RAGE OF 4-20/1 AT A TEMPERATURE OF AT LEAST 950*F. WHICH IS PASSED THROUGH SAID RISER CONVERSION ZONE, PASSING A LOW BOILING HYDROCARBON FRACTION RICH IN C3 AND C4 HYDROCARBON TO THE OTHER OF SAID RISER CONVERSION ZONES UNDER CONDITIONS TO FORM A CATALYST/HYDROCARBON SUSPENSION AT A TEMPERATURE IN THE RANGE OF 700*F. TO 1100*F
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein freshly regenerated faujasite type zeolite catalyst is passed to each riser conversion zone.
Claim 4
Dependent Claim
48 words
The process of claim 1 wherein freshly regenerated catalyst passed to the hydrocarbon conversion zone processing a gas oil boiling hydrocarbon fraction is then cascaded at a temperature within the range of 850*F. to 1050*F. after stripping to said conversion zone processing a low boiling C3-C4 hydrocarbon fraction.
Claim 5
Dependent Claim
48 words
The process of claim 1 wherein catalyst particles separated from the conversion zone processing the high boiling hydrocarbon fraction are cascaded in part to a separate adjacent stripping zone provided for stripping a separate bed of catalyst separated from the low boiling hydrocarbon conversion zone before regeneration thereof.
Claim 6
Dependent Claim
100 words
The process of claim 3 wherein the catalyst separated from the high boiling hydrocarbon conversion zone is stripped in a separate stripping zone at an elevated temperature before use thereof in the low boiling hydrocarbon conversion zone at a catalyst to hydrocarbon ratio in the range of 5-40/1 at a temperature selected from within the range of 800*F. to about 1050*F. for a hydrocarbon residence time in the range of 5 to 15 seconds and catalyst separated from the low boiling hydrocarbon conversion zone is stripped in a separate stripping zone at an elevated temperature before passage to catalyst regeneration.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the catalyst separated from each conversion zone is passed to a common stripping zone before passage to catalyst regeneration.
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 |