Patent US3814342A successfully refreshed from Google Patents.
Patent US2678950A successfully refreshed from Google Patents.
US2678950A
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Process of producing acrolein
Assignee: —
•
Filing: —
•
Granted: 1954-05-18
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Expires: 1971-05-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:50
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/48; C07C41/50; C07C41/56; C07C43/00; C07C43/30; C07C43/303; C07C45/00; C07C45/51; C07C45/52; C07C47/00; C07C47/20; C07C47/21; C07C47/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR THE PRODUCTION OF AN ACETAL OF ACROLEIN WHICH COMPRISES HEATING ACROLEIN AND A LOWER ALIPHATIC ALCOHOL IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SULFO ACID, SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, SULFAMIC ACID, ALIPHATIC SULFONIC ACIDS AND AROMATIC SULFONIC ACIDS, THE CATALYST BEING PRESENT IN AMOUNT BETWEEN ABOUT 0.001 AND ABOUT 0.01 MOLE PER 100 MOLES OF ACROLEIN, AT A TEMPERATURE ETWEEN APPROXIMATELY 25 AND APPROXIMATELY FIFTY DEGREES CENTIGRADE, WHILE REMOVING THE WATER FORMED DURING THE CONDENSATION FROM THE REACTION MIXTURE CONTINUOUSLY AS FORMED, AND SUBSEQUENTLY RECOVERING THE ACROLEIN ACETAL FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
101 words
A PROCESS FOR THE PRODUCTION OF AN ACETAL OF ACROLEIN WHICH COMPRISES HEATING ACROLEIN AND A LOWER ALIPHATIC ALCOHOL IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SULFO ACID, SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, SULFAMIC ACID, ALIPHATIC SULFONIC ACIDS AND AROMATIC SULFONIC ACIDS, THE CATALYST BEING PRESENT IN AMOUNT BETWEEN ABOUT 0.001 AND ABOUT 0.01 MOLE PER 100 MOLES OF ACROLEIN, AT A TEMPERATURE ETWEEN APPROXIMATELY 25 AND APPROXIMATELY FIFTY DEGREES CENTIGRADE, WHILE REMOVING THE WATER FORMED DURING THE CONDENSATION FROM THE REACTION MIXTURE CONTINUOUSLY AS FORMED, AND SUBSEQUENTLY RECOVERING THE ACROLEIN ACETAL FROM THE REACTION MIXTURE.
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) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |