US3907663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of hydrocarbons
Assignee: Mobil Oil AS
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Filing: 1973-10-01
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Granted: 1975-09-23
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Expires: 1993-10-01
Abstract
Abstract A process for converting hydrocarbons by a combination of fluid catalytic cracking and alkylation or aromatization of at least a part of the cracked product by contacting a hydrocarbon chargestock with a mixture of cracking catalyst and ZSM-5 type catalyst under cracking conditions; separating the mixture of cracking catalyst and ZSM-5 type catalyst from the cracked product; contacting at least a part of the cracked product with fresh ZSM-5 type catalyst under alkylation or aromatization conditions; separating the ZSM-5 type catalyst from the alkylated or aromatized product; and combining the ZSM-5 type catalyst separated from the alkylation and aromatization step with the mixture of cracking catalyst and ZSM-5 type catalyst.
Inventors
- 👤 Hartley Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:31
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G35/00; C10G35/04; C10G35/06; C10G35/095; C10G63/00; C10G63/02; C10G63/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
A METHHOD FOR CONVERTING RELATIVELY HIGH AND LOW BOILING HYDROCARBONS TO GASOLINE BOILING RANGE MATERIALS WHICH COMPRISES, CRACKING GAS OIL BOILING RANGE HYDROCARBONS IN A CRACKING ZONE IN THE PRESENCE OF A REGENERATED DUAL-COMPONENT CRACKING CATALYST COMPRISING A ZSM-5 TYPE OF CRYSTALLINE ZEOLITE UNDER ELEVATED TEMPERATURE CRACKING CONSITIONS SELECTED TO FORM GASOLINE BOILING RANGE COMPONENTS AND LOWER BOILING GASEOUS HYDROCARBONS COMPRISING OLEFINS AND PARAFFINS, SEPARATING THE GASEOUS HYDROCARBONS FROM GASOLINE BOILING RANGE COMPONENTS AND PASSING THE GASEOUS HYDROCARBONS IN CONTACT WITH A SEPARATE MASS OF ZSM-5TYPE ZEOLITE CATALYST HAVING ACTIVITY FOR CYCLIZING AND AROMATIZING SAID GASEOUS HYDROCARBONS TO FORM AROMATICS, COMBINING THE HYDROCARBON PRODUCT OF GASEOUS HYDROCARBON AROMATIZING STEP WITH A PRODUCT OF SAID GAS OIL CRACKING BEFORE SEPARATING THE PRODUCTS THEREOF, PASSING CATALYST USED IN SAID GAS OIL CRACKING TO CATALYST REGENERATION, AND CASCADING ZSM-5 TYPE ZEOLITE CATALYST FROM SAID MASS OF CATALYST USED IN SAID AROMATIZING STEP OPERATION TO SAID GAS OIL CRACKING AS REQUIRED.
Claim 2
Dependent Claim
157 words
A METHHOD FOR CONVERTING RELATIVELY HIGH AND LOW BOILING HYDROCARBONS TO GASOLINE BOILING RANGE MATERIALS WHICH COMPRISES, CRACKING GAS OIL BOILING RANGE HYDROCARBONS IN A CRACKING ZONE IN THE PRESENCE OF A REGENERATED DUAL-COMPONENT CRACKING CATALYST COMPRISING A ZSM-5 TYPE OF CRYSTALLINE ZEOLITE UNDER ELEVATED TEMPERATURE CRACKING CONSITIONS SELECTED TO FORM GASOLINE BOILING RANGE COMPONENTS AND LOWER BOILING GASEOUS HYDROCARBONS COMPRISING OLEFINS AND PARAFFINS, SEPARATING THE GASEOUS HYDROCARBONS FROM GASOLINE BOILING RANGE COMPONENTS AND PASSING THE GASEOUS HYDROCARBONS IN CONTACT WITH A SEPARATE MASS OF ZSM-5TYPE ZEOLITE CATALYST HAVING ACTIVITY FOR CYCLIZING AND AROMATIZING SAID GASEOUS HYDROCARBONS TO FORM AROMATICS, COMBINING THE HYDROCARBON PRODUCT OF GASEOUS HYDROCARBON AROMATIZING STEP WITH A PRODUCT OF SAID GAS OIL CRACKING BEFORE SEPARATING THE PRODUCTS THEREOF, PASSING CATALYST USED IN SAID GAS OIL CRACKING TO CATALYST REGENERATION, AND CASCADING ZSM-5 TYPE ZEOLITE CATALYST FROM SAID MASS OF CATALYST USED IN SAID AROMATIZING STEP OPERATION TO SAID GAS OIL CRACKING AS REQUIRED.
Claim 3
Dependent Claim
56 words
The method of claim 1 wherein the gaseous hydrocarbons separated from the combined products are aromatized at a temperature within the range of about 600*F. to about 1100*F. at a pressure in the range of 1 to 10 atmospheres and a space velocity in the range of about 0.1 to about 80 wt. hourly space velocity.
Claim 4
Dependent Claim
53 words
The method of claim 1 wherein heat is provided to said aromatizing by one of (1) preheating of the feed reactant (2) indirect heat exchange with hot regenerated catalyst of said gas oil cracking and (3) indirect heat exchange with hot flue gases obtained from regenerating the catalyst of the gas oil cracking.
Claim 5
Dependent Claim
48 words
The method of claim 1 wherein said gas oil cracking occurs in a riser conversion zone and said aromatizing occurs in a separate dense fluid-catalyst-bed reaction zone and fresh ZSM-5 type zeolite is used first in said dense fluid catalyst bed before transfer to said gas oil cracking.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said gaseous hydrocarbons from gas oil cracking are composed of C4 and lighter hydrocarbons.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein a combined product of cracking and aromatizing comprises C5 to 400*F. boiling range hydrocarbons.
Claim 8
Dependent Claim
47 words
The method of claim 1 wherein said ZSM-5 type zeolite has activity for alkylating aromatics at a temperature in the range of about 100*F. to 700*F. at a pressure in the range of 1 to 10 atmospheres and a space velocity of about 0.1 to 20 WHSV.
Claim 9
Dependent Claim
36 words
The method of claim 7 wherein products of the combination operation comprises incompletely reacted paraffinic fragments and aromatic hydrocarbons which are recycled to said mass of ZSM-5 type zeolite as reactant material to form alkyl aromatics.
Claim 10
Dependent Claim
26 words
The method of claim 1 wherein cascade of the ZSM-5 type zeolite is accomplished when regeneration of the mass of ZSM-5 type zeolite catalyst is required.
Claim 11
Dependent Claim
36 words
The method of claim 1 wherein cascade of the ZSM-5 type catalyst to the gas oil cracking operation is performed to maintain the ZSM-5 zeolite level of the gas oil cracking catalyst at a predetermined level.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |