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US2568095A
Expired / Lapsed
US
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Recovery of organic acids with an amine solvent
Assignee: Standard Oil Co
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Filing: 1949-04-29
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Granted: 1951-09-18
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Expires: 1969-04-29
Abstract
No abstract record available.
Inventors
- 👤 Everet F Smith
- 👤 Voorhees Vanderveer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:40
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A PROCESS FOR SEPARATING A WATER-IMMISCIBLE ORGANIC ACID FROM A WATER-IMMISCIBLE ORGANIC SOLUTION COMPRISED THEREOF, THE STEPS WHICH COMPRISE EXTRACTING SAID ORGANIC ACID FROM SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 10 AND 60* C. WITH AN AQUEOUS EXTRACTANT SOLUTION CONTAINING BETWEEN ABOUT 5 AND 25 PERCENT BY WEIGHT OF A WATER-IMMISCIBLE AMINE, HEATING THE RESULTING EXTRACT TO AN ELEVATED TEMPERATURE ABOVE ABOUT 75* C. WHEREAT LIBERATION AND STRATIFICATION OF SAID ORGANIC ACID TAKES PLACE, AND SEPARATING AND WITHDRAWING SAID ORGANIC ACID.
Claim 2
Dependent Claim
83 words
IN A PROCESS FOR SEPARATING A WATER-IMMISCIBLE ORGANIC ACID FROM A WATER-IMMISCIBLE ORGANIC SOLUTION COMPRISED THEREOF, THE STEPS WHICH COMPRISE EXTRACTING SAID ORGANIC ACID FROM SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 10 AND 60* C. WITH AN AQUEOUS EXTRACTANT SOLUTION CONTAINING BETWEEN ABOUT 5 AND 25 PERCENT BY WEIGHT OF A WATER-IMMISCIBLE AMINE, HEATING THE RESULTING EXTRACT TO AN ELEVATED TEMPERATURE ABOVE ABOUT 75* C. WHEREAT LIBERATION AND STRATIFICATION OF SAID ORGANIC ACID TAKES PLACE, AND SEPARATING AND WITHDRAWING SAID ORGANIC ACID.
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) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |