US2738367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of levulinic acid
Assignee: Millennium Petrochemicals Inc
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Filing: 1952-03-22
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Granted: 1956-03-13
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Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Bryan C Redmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:30
CPC Classifications
C; C07; C07C; C07C51/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR PRODUCING LEVULINIC ACID COMPRISING HEATING AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FURFURYL ALCOHOL, FRUCTOSE, SUCROSE AND GLUCOSE, IN THE PRESENCE OF A STRONGLY ACIDIC CATION EXCHANGE RESIN, IN AN AMOUNT EQUAL TO ABOUT 18-19% OF THE TOTAL WEIGHT OF THE REACTION MIXTURE, SAID SOLUTION BEING MAINTAINED AT AN ELEVATED TEMPERATURE WITHIN THE RANGE OF ABOUT 30* TO ABOUT 100* C. IN CONTACT WITH THE RESIN UNTIL A SUBSTANTIAL PROPORTION OF THE SELECTED COMPOUND OF THE GROUP HAS BEEN CONVERTED TO LEVULINIC ACID.
Claim 2
Dependent Claim
91 words
A PROCESS FOR PRODUCING LEVULINIC ACID COMPRISING HEATING AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FURFURYL ALCOHOL, FRUCTOSE, SUCROSE AND GLUCOSE, IN THE PRESENCE OF A STRONGLY ACIDIC CATION EXCHANGE RESIN, IN AN AMOUNT EQUAL TO ABOUT 18-19% OF THE TOTAL WEIGHT OF THE REACTION MIXTURE, SAID SOLUTION BEING MAINTAINED AT AN ELEVATED TEMPERATURE WITHIN THE RANGE OF ABOUT 30* TO ABOUT 100* C. IN CONTACT WITH THE RESIN UNTIL A SUBSTANTIAL PROPORTION OF THE SELECTED COMPOUND OF THE GROUP HAS BEEN CONVERTED TO LEVULINIC 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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |