US3788975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous production of aromatic hydrocarbons and isobutane
Assignee: Universal Oil Products Co
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Filing: 1971-09-30
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Granted: 1974-01-29
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Expires: 1991-09-30
Abstract
Abstract A NAPHTHA BOILING RANGE CHARGE STOCK CONVERTED INTO AROMATIC HYDROCARBONS AND ISOBUTANE VIA A COMBINATION PROCESS INVOLVING HYDROCRACKING, SEPARATION AND CATALYSTIC REFORMING. THE CHARGE STOCK IS INITIALLY SUBJECTED TO A NOVEL FORM OF HYDROCRACKING TO PRODUCE A PRODUCT PREDOMINANTLY COMPRISING NAPHTHENIC HYDROCARBONS AND HIGHLY BRANCHED PARAFFINS, THE MAJORITY OF THE LATTER BEING ISOBUTANE. FOLLOWING SEPARATION TO RECOVER THE ISOBUTANE AND TO PROVIDE A HEPTANE-PLUS NORMALLY LIQUID STREAM, CATALYSTIC REFORMING A UTILIZED TO DEHYDROGENATE THE NAPHTHENIC COMPOUNDS IN THE LATTER TO PRODUCE AN AROMATIC CONCENTRATE.
Inventors
- 👤 G Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C10G; C10G59/00; C10G59/02; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |