US2575556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing and refining ethyl alcohol
Assignee: Shell Development Co
•
Filing: 1947-09-23
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Granted: 1951-11-20
•
Expires: 1967-09-23
Abstract
No abstract record available.
Inventors
- 👤 Russel L Maycock
- 👤 Clarence L Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:52
CPC Classifications
A; A41; A41D; A41D1/00; A41D1/04; C; C07; C07C; C07C29/00; C07C29/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A METHOD OF PRODUCING ETHANOL, THE STEPS COMPRISING REACTING GASEOUS ETHYLENE AND WATER VAPOR AT ELEVATED TEMPERATURES AND PRESSURES AND IN THE PRESENCE OF AND ACID CATALYST TO PRODUCE A CRUDE, ETHANOL - CONTAINING, GASEOUS EFFLUENT STRONGLY ACID IN CHARACTER; MAINTAINING SAID EFFLUENT IN THE GASEOUS STATE SPRAYING SAID EFFLUENT WITH A SOLUTION OF AN ALKALINE MATERIAL IN A QUANTITY SUFFICIENT TO ESTABLISH A PH OF FROM 6.5 TO ABOUT 7.5 LIQUID OBTAINED ON CONDENSING THE EFFLUENT; CONDENSING THE EFFLUENT; FRACTIONALLY DISTILLING THE CONDENSATE TO PROVIDE A DISTILLATE HIGH ETHANOL; HYDROGENATING THE DISTILLATE IN THE PRESENCE OF A NICKEL HYDROGENATION CATALYST; AND FRACTIONALLY DISTILLING THE HYDROGENATED SOLUTION TO PRODUCE AN ETHANOL FRACTION HAVING A PERMANGANATE TIME AT LEAST 30 MINUTES AND A TRUE, UNADULTERATED ETHANOL ODOR.
Claim 2
Dependent Claim
127 words
IN A METHOD OF PRODUCING ETHANOL, THE STEPS COMPRISING REACTING GASEOUS ETHYLENE AND WATER VAPOR AT ELEVATED TEMPERATURES AND PRESSURES AND IN THE PRESENCE OF AND ACID CATALYST TO PRODUCE A CRUDE, ETHANOL - CONTAINING, GASEOUS EFFLUENT STRONGLY ACID IN CHARACTER; MAINTAINING SAID EFFLUENT IN THE GASEOUS STATE SPRAYING SAID EFFLUENT WITH A SOLUTION OF AN ALKALINE MATERIAL IN A QUANTITY SUFFICIENT TO ESTABLISH A PH OF FROM 6.5 TO ABOUT 7.5 LIQUID OBTAINED ON CONDENSING THE EFFLUENT; CONDENSING THE EFFLUENT; FRACTIONALLY DISTILLING THE CONDENSATE TO PROVIDE A DISTILLATE HIGH ETHANOL; HYDROGENATING THE DISTILLATE IN THE PRESENCE OF A NICKEL HYDROGENATION CATALYST; AND FRACTIONALLY DISTILLING THE HYDROGENATED SOLUTION TO PRODUCE AN ETHANOL FRACTION HAVING A PERMANGANATE TIME AT LEAST 30 MINUTES AND A TRUE, UNADULTERATED ETHANOL ODOR.
References Cited (Backward Citations)
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US1681238A
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US2050445A
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US2080111A
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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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |