US3247101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon treating process
Assignee: Texaco Inc
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Filing: 1964-05-28
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Granted: 1966-04-19
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Robert A Woodle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:10
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
146 words
IN THE SOLVENT REFINING OF A HYDROCARBON OIL BOILING WITHIN THE RANGE OF ABOUT 250 TO 600*F. AND HAVING AN ASTM DISTILLATION 50 PERCENT POINT LESS THAN 430*F. WHEREIN SAID HYDROCARBON OIL IS CONTACTED WITH A SOLVENT COMPRISING FURFURAL FORMING RAFFINATE AND EXTRACT-MIXPHASES AND REFINED OIL AND EXTRACT ARE SEPARATED FROM SAID RAFFINATE AND EXTRACT-MIX PHASES RESPECTIVELY, THE IMPROVEMENT WHICH COMPRISES: CONTACTING SAID HYDROCARBON OIL WITH A SOLVENT CONSISTING ESSENTIALLY OF FURFURAL AND CONTAINING AT MOST ABOUT 0.5 WEIGHT PERCENT DISSOLVED WATER FORMING RAFFINATE AND EXTRACT-MIX PHASES, SEPARATING SAID PHASES, DISTILLING SAID RAFFINATE PHASE IN THE PRESENCE OF A HYDROCARBON AZEOTROPE FORMER SEPARATED FROM SAID RAFFINATE AND IN THE ABSENCE OF ADDED STEAM IN A FIRST DISTILLATION ZONE SEPARATING AND AZEOTROPE OR FURFURAL AND HYDROCARBON AS DISTILLATION VAPORS FROM REFINED OIL AS DISTILLATION BOTTOMS, CONDENSING SAID DISTILLATION VAPORS FORMING A HYDROCARBON PHASE AND A FURFURAL PHASE,
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |