US3793192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic cracking process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-04-14
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Granted: 1974-02-19
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Expires: 1992-04-14
Abstract
Abstract Process for preparing high clear octane gasoline is provided comprising: A. CATALYTICALLY CRACKING A HYDROCARBON FEED STREAM AT HIGH CONVERSION LEVELS FOR THE PRODUCTION OF A C5/430*F. fraction; B. FRACTIONATING SAID C5/430*F. fraction to obtain a light fraction, e.g., a C5/180*F. fraction, an intermediate fraction, e.g., a 180*/270*F. fraction, and a heavy fraction, e.g., a 270*/430*F. fraction; C. REFORMING AT LEAST A PORTION OF SAID INTERMEDIATE FRACTION OVER A REFORMING CATALYST TO OBTAIN A HIGH OCTANE REFORMATE; AND, D. BLENDING SAID REFORMATE WITH SAID LIGHT AND HEAVY FRACTIONS TO OBTAIN A HIGH CLEAR OCTANE GASOLINE.
Inventors
- 👤 E Gladrow
- 👤 C Kimberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:38
CPC Classifications
C; C10; C10G; C10G63/00; C10G63/02; C10G63/04; C10G61/00; C10G61/02; C10G61/04; C10L; C10L1/00; C10L1/04; C10L1/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
Process for preparing high clear octane gasoline comprising: a. catalytically cracking a hydrocarbon feed stream at conversion levels ranging from about 75-90 percent (to 430*F. ) for the production of a C5430*F. fraction; b. fractionating said C5/430*F. fraction to obtain a light C5180*F. fraction, an intermediate 180*/270*F. fraction, and a 270*/430*F. heavy fraction; c. reforming at least a portion of said intermediate fraction over a reforming catalyst by direct passage, without a diluent, to obtain a high octane reformate; and, d. blending said reformate with said light and heavy fractions to obtain a high clear octane gasoline.
Claim 2
Dependent Claim
67 words
Process as defined in claim 1 wherein the intermediate fraction is extracted to form an aromatic extract and a raffinate, the aromatic extract is blended with said light and heavy fractions, the raffinate is reformed over a reforming catalyst to obtain a high octane reformate, and said reformate is blended with said light and heavy fractions and said aromatic extract to obtain a high clear octane gasoline.
Claim 3
Dependent Claim
19 words
Process as defined in claim 1 wherein catalytic cracking is effected at temperatures ranging from 700* to about 1,200*F.
Claim 4
Dependent Claim
23 words
Process as defined in claim 1 wherein the liquid hourly space velocity within the cracking zone ranges between about 0.5 and 20 V/Hr./V.
Claim 5
Dependent Claim
16 words
Process as defined in claim 1 wherein the catalyst:oil ratio ranges between about 2.1 and 20:1.
Claim 6
Dependent Claim
21 words
Process as defined in claim 1 wherein the pressure within the cracking zone ranged from about 5 to about 100 psig.
Claim 7
Dependent Claim
19 words
Process as defined in claim 1 wherein the catalyst employed in the cracking zone comprises a crystalline aluminosilicate zeolite.
Claim 8
Dependent Claim
19 words
Process as defined in claim 1 wherein the temperature within the reforming zone ranges between about 825*F. and 1,000*F.
Claim 9
Dependent Claim
24 words
Process as defined in claim 1 wherein the space velocity of the reactants in the reforming zone ranges between about 1 to 5 W/Hr./W.
Claim 10
Dependent Claim
20 words
Process as defined in claim 1 wherein the pressure within the reforming zone ranges between about 100 to 1,000 psig.
Claim 11
Dependent Claim
21 words
Process as defined in claim 1 wherein the hydrogen rate to the reformer zone ranges between about 4,000 to 12,000 SCF/B.
Claim 12
Dependent Claim
38 words
Process as defined in claim 1 wherein the catalyst employed in the reforming zone comprises activated alumina with from about 0.05% to about 1% of platinum and from about 0.05 percent to about 1 percent of a halogen.
Claim 13
Dependent Claim
28 words
Process as defined in claim 1 wherein the catalyst employed in the reforming zone comprises a mixture of Group VI and iron group metals supported on activated alumina.
Claim 14
Dependent Claim
18 words
Process as defined in claim 1 wherein the intermediate fraction is blended with reformer feed prior to reforming.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |