Patent US2691685A successfully refreshed from Google Patents.
US2691685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making acetals
Assignee: —
•
Filing: —
•
Granted: 1954-10-12
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Expires: 1971-10-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:16
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/48; C07C41/50; C07C41/56; C07C43/00; C07C43/30; C07C43/303
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD FOR MAKING AN ACETAL WHICH COMPRISES PASSING A SATURATED ALIPHATIC ALDEHYDE CONTAINING FROM 2 TO 3 CARBON ATOMS IN THE MOLECULE AND A MONOHYDRIC ALKYL ALCOHOL SELECTED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY MONOHYDRIC ALKYL ALCOHOLS CONTAINING FROM 2 TO 4 CARBON ATOMS IN THE MOLECULE THROUGH A HEATED ZONE WHEREIN VAPORS OF THE ALDEHYDE AND THE ALCOHOL IN ADMIXTURE WITH EACH OTHER ARE HEATED TO A REACTION TEMPERATURE OF FROM 200* TO 600* C. IN THE ABSENCE OF A CATALYST FOR A CONTACT TIME OF FROM 0.1 TO 10 SECONDS, COOLING THE EFFLUENT VAPOR TO CONDENSE LIQUID PRODUCT AND SEPARATING THE ACETAL FROM THE CONDENSED LIQUID.
Claim 2
Independent Claim
111 words
A METHOD FOR MAKING AN ACETAL WHICH COMPRISES PASSING A SATURATED ALIPHATIC ALDEHYDE CONTAINING FROM 2 TO 3 CARBON ATOMS IN THE MOLECULE AND A MONOHYDRIC ALKYL ALCOHOL SELECTED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY MONOHYDRIC ALKYL ALCOHOLS CONTAINING FROM 2 TO 4 CARBON ATOMS IN THE MOLECULE THROUGH A HEATED ZONE WHEREIN VAPORS OF THE ALDEHYDE AND THE ALCOHOL IN ADMIXTURE WITH EACH OTHER ARE HEATED TO A REACTION TEMPERATURE OF FROM 200* TO 600* C. IN THE ABSENCE OF A CATALYST FOR A CONTACT TIME OF FROM 0.1 TO 10 SECONDS, COOLING THE EFFLUENT VAPOR TO CONDENSE LIQUID PRODUCT AND SEPARATING THE ACETAL FROM THE CONDENSED LIQUID.
References Cited (Backward Citations)
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Cited
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US2508257A
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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) | 1957-10-11 | 1958-04-12 | 1958-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-11 | 1962-04-12 | 1962-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-11 | 1966-04-12 | 1966-10-12 | $7700.00 | Window Closed / Lapsed |