US3100741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcohol dehydration process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-08-07
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Granted: 1963-08-13
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Expires: 1977-08-07
Abstract
No abstract record available.
Inventors
- 👤 Rogillio Archie Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:51
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A METHOD FOR DEHYDRATING ISOPROPANOL WHEREIN CRUDE AQUEOUS ISOPROPANOL IS FRACTIONALLY DISTILLED IN A FRACTIONATION ZONE AT ELEVATED TEMPERATURES AND PRESSURES AND IN THE PRESENCE OF LARGE AMOUNTS OF ETHER AND WHEREIN A GASEOUS ETHER-WATER MIXTURE IS RECOVERED OVER-HEAD, CONDENSED AND SEPARATED INTO ETHER AND AQUEOUS PHASES AND WHEREIN THE ETHER PHASE IS SEPARATED IN A SEPARATION ZONE FROM SAID AQUEOUS PHASE AND RECYCLED TO THE FRACTIONATION ZONE AS EITHER REFLUX, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID ETHER REFLUZ ANHYDROUS ETHER, SAID ANHYDROUS ETHER BEING IN ADDITION TO SAID RECYCLED ETHER PHASE AND CONSTITUTING AN AMOUNT OF FROM 0.05 TO 5.0 VOLUME PERCENT BASED ON SAID RECYCLED ETHER PHASE TO PERMIT A SUBSTANIALLY CONSTANT HIGH CRUDE ISOPROPANOL FEED RATE.
Claim 2
Dependent Claim
121 words
IN A METHOD FOR DEHYDRATING ISOPROPANOL WHEREIN CRUDE AQUEOUS ISOPROPANOL IS FRACTIONALLY DISTILLED IN A FRACTIONATION ZONE AT ELEVATED TEMPERATURES AND PRESSURES AND IN THE PRESENCE OF LARGE AMOUNTS OF ETHER AND WHEREIN A GASEOUS ETHER-WATER MIXTURE IS RECOVERED OVER-HEAD, CONDENSED AND SEPARATED INTO ETHER AND AQUEOUS PHASES AND WHEREIN THE ETHER PHASE IS SEPARATED IN A SEPARATION ZONE FROM SAID AQUEOUS PHASE AND RECYCLED TO THE FRACTIONATION ZONE AS EITHER REFLUX, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID ETHER REFLUZ ANHYDROUS ETHER, SAID ANHYDROUS ETHER BEING IN ADDITION TO SAID RECYCLED ETHER PHASE AND CONSTITUTING AN AMOUNT OF FROM 0.05 TO 5.0 VOLUME PERCENT BASED ON SAID RECYCLED ETHER PHASE TO PERMIT A SUBSTANIALLY CONSTANT HIGH CRUDE ISOPROPANOL FEED RATE.
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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |