US3755140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous production of aromatic hydrocarbons and isobutane
Assignee: Universal Oil Products Co
•
Filing: 1971-08-11
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Granted: 1973-08-28
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Expires: 1991-08-11
Abstract
Abstract A naphtha boiling range charge stock is converted into aromatic hydrocarbons and isobutane via a combination process involving catalytic reforming, separation and hydrocracking. The catalytic reforming is effected at low-severity conditions to maximize the reaction of naphthene dehydrogenation while simultaneously decelerating the dehydrocyclization and cracking of paraffinic hydrocarbons. Following separation of an aromatic concentrate, the remaining saturated hydrocarbons are subjected to a particular hydrocracking technique which results in exceedingly high yields of isobutane.
Inventors
- 👤 E Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:07
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02; C10L; C10L1/00; C10L1/04; C10L1/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
The process of claim 1 further characterized in that said reformed product effluent is separated in a solvent extraction zone.
Claim 2
Dependent Claim
56 words
The process of claim 1 further characterized in that said hydrocracking conditions include a maximum catalyst bed temperature from 300* F. to 480* F., a liquid hourly space velocity in the range of 1.0 to about 10.0, a hydrogen concentration of 3,000 to about 20,000 scf./Bbl. and a pressure from about 500 to about 2,000 psig.
Claim 3
Dependent Claim
30 words
The process of claim 1 further characterized in that said hydrocracking catalytic composite comprises from about 0.1 percent to about 2.0 percent by weight of a platinum or palladium component.
Claim 4
Dependent Claim
28 words
The process of claim 1 further characterized in that said hydrocracking catalytic composite comprises from about 1.0 percent to about 10.0 percent by weight of a nickel component.
Claim 5
Dependent Claim
17 words
The process of claim 1 further characterized in that said Friedel-Crafts metal halide is an aluminum halide.
References Cited (Backward Citations)
US2908628A
Cited
US3114696A
Cited
US3660520A
Cited
US3649520A
Cited
US3658690A
Cited
US3692666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |