Patent US2805260A successfully refreshed from Google Patents.
US2805260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alhohols and ethers
Assignee: Sinclair Refining Co
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Filing: 1955-06-10
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Granted: 1957-09-03
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Expires: 1975-06-10
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:07
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF PRODUCING AN ETHER-CONTAINING PRODUCT IN A SYSTEM COMPRISING THREE VERTICALLY SPACED REACTION ZONES, EACH HAVING A DOWNWARDLY FLOWING BED OF INORGANIC CATALYST AND PROVIDING FOR CATALYST FLOW BY GRAVITY THROUGH THE BEDS IN THE THREE ZONES, WHICH COMPRISES PASSING MONO-OLEFIN CONTAINING 2 TO 4 CARBON ATOMS AND WATER INTO THE LOWER PORTION OF THE UPPER CATALYST BED MAINTAINED UNDER OLEFIN HYDRATING CONDITIONS, PASSING CATALYST FROM THIS UPPER ZONE TO THE NEXT LOWER ZONE, CONTACTING THE DOWNWARDLY FLOWING BED OF CATALYST IN THIS ZONE WITH HOT INERT GAS TO DEHYDRATE THE CATALYST, PASSING THE DEHYDRATED CATALYST TO THE DOWNWARDLY FLOWING BED IN THE NEXT LOWER ZONE, INTRODUCING INTO THE LOWER PORTION OF THIS ZONE THE DEWATERED EFFLUENT PRODUCT FROM THE UPPERMOST OLEFIN HYDRATION ZONE, WITHDRAWING CATALYST FROM THE LOWERMOST REACTION ZONE, AND INTRODUCING IT INTO THE UPPER PORTION OF THE OLEFIN HYDRATION ZONE.
Claim 2
Independent Claim
145 words
THE METHOD OF PRODUCING AN ETHER-CONTAINING PRODUCT IN A SYSTEM COMPRISING THREE VERTICALLY SPACED REACTION ZONES, EACH HAVING A DOWNWARDLY FLOWING BED OF INORGANIC CATALYST AND PROVIDING FOR CATALYST FLOW BY GRAVITY THROUGH THE BEDS IN THE THREE ZONES, WHICH COMPRISES PASSING MONO-OLEFIN CONTAINING 2 TO 4 CARBON ATOMS AND WATER INTO THE LOWER PORTION OF THE UPPER CATALYST BED MAINTAINED UNDER OLEFIN HYDRATING CONDITIONS, PASSING CATALYST FROM THIS UPPER ZONE TO THE NEXT LOWER ZONE, CONTACTING THE DOWNWARDLY FLOWING BED OF CATALYST IN THIS ZONE WITH HOT INERT GAS TO DEHYDRATE THE CATALYST, PASSING THE DEHYDRATED CATALYST TO THE DOWNWARDLY FLOWING BED IN THE NEXT LOWER ZONE, INTRODUCING INTO THE LOWER PORTION OF THIS ZONE THE DEWATERED EFFLUENT PRODUCT FROM THE UPPERMOST OLEFIN HYDRATION ZONE, WITHDRAWING CATALYST FROM THE LOWERMOST REACTION ZONE, AND INTRODUCING IT INTO THE UPPER PORTION OF THE OLEFIN HYDRATION ZONE.
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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |