US3635815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a mixture of high-purity c{11 aromatic hydrocarbons
Assignee: Universal Oil Products Co
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Filing: 1969-07-02
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Granted: 1972-01-18
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Expires: 1989-07-02
Abstract
Abstract High purity C8 aromatic hydrocarbons are produced by prefractionating a C6-400* F. naphtha feed fraction into a 270* F. to 275* F. endpoint fraction and catalytically reforming this 270* F. to 275* F. endpoint fraction to produce a reformate having a minimum of C9+ hydrocarbons. The reformate is then passed to a deoctanizing zone and a rerun column zone to recover a mixture of high-purity C8 aromatic hydrocarbons.
Inventors
- 👤 Paul J Kuchar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:28
CPC Classifications
C; C10; C10G; C10G7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
The process according to claim 1 wherein said naphtha fraction having a 270* F. to 275* F. endpoint comprises from 2 to 5 liquid volume percent C9+ naphthenes plus paraffins and wherein said reforming conditions include a severity producing C5+ reformate clear target octane of from 92.0 to 96.0.
Claim 2
Dependent Claim
49 words
The process according to claim 1 wherein said naphtha fraction having a 270* F. to 275* F. endpoint comprises from 5 to 10 liquid volume percent C9+ naphthenes plus paraffins and wherein said reforming conditions include a severity producing C5+ reformate clear target octane of from 96.0 to 100.0.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |