US2519540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bianufacttjre of dietbnbl acetal
Assignee: —
•
Filing: —
•
Granted: 1950-08-22
•
Expires: 1967-08-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:22
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/48; C07C41/50; C07C41/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS FOR MANUFACTURING DIETHYLACETAL WHICH COMPRISES REACTING ACETALDEHYDE WITH ETHANOL IN THE PRESENCE OF AN ACIDIC CATALYST AND OF AN INERT ORGANIC SOLVENT FOR ACETAL WHICH IS SUBSTANTIALLY IMMESCIBLE WITH WATER, HAS A DISTRIBUTION COEFFICIENT FOR THE ACETAL IN RELATION TO WATER WHICH IS AT LEAST DOUBLE THAT FOR THE ALCOHOL AND THE ALDEHYDE WITH RESPECT TO WATER, AND DOES NOT FORM AN AZEOTROPE TO CAUSE A MAJOR PROPORTION OF THE WATER IN THE REACTION MIXTURE TO SEPARATE OUT AS AN AQUEOUS PHASE AS FORMED, SEPARATING THE TWO PHASES FORMED AND RECOVERING THE ACETAL FROM THE ORGANIC LIQUID PHASE BY DISTILLATION.
Claim 2
Dependent Claim
102 words
A PROCESS FOR MANUFACTURING DIETHYLACETAL WHICH COMPRISES REACTING ACETALDEHYDE WITH ETHANOL IN THE PRESENCE OF AN ACIDIC CATALYST AND OF AN INERT ORGANIC SOLVENT FOR ACETAL WHICH IS SUBSTANTIALLY IMMESCIBLE WITH WATER, HAS A DISTRIBUTION COEFFICIENT FOR THE ACETAL IN RELATION TO WATER WHICH IS AT LEAST DOUBLE THAT FOR THE ALCOHOL AND THE ALDEHYDE WITH RESPECT TO WATER, AND DOES NOT FORM AN AZEOTROPE TO CAUSE A MAJOR PROPORTION OF THE WATER IN THE REACTION MIXTURE TO SEPARATE OUT AS AN AQUEOUS PHASE AS FORMED, SEPARATING THE TWO PHASES FORMED AND RECOVERING THE ACETAL FROM THE ORGANIC LIQUID PHASE BY DISTILLATION.
References Cited (Backward Citations)
GB543030A
Cited
US2374494A
Cited
US1850836A
Cited
FR785791A
Cited
US2183317A
Cited
US2321094A
Cited
US2360957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |