Patent US2805983A successfully refreshed from Google Patents.
US2805983A
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Separation of alkoxyacetones and alkoxy-2-propanols from mixtures thereof
Assignee: Dow Chemical Co
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Filing: 1954-04-05
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Granted: 1957-09-10
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Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 Lee H Horsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:27
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C45/84; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD WHICH COMPRISES SUBJECTING TO FRACTIONAL DISTILLATION A MIXTURE OF A 1-ALKOXY-2-PROPANONE AND THE CORRESPONDING 1-ALKOXY-2-PROPANOL THAT FORMS AN AZEOTROPE WHEN DISTILLED AT APPROXIMATELY ATMOSPHERIC PRESSURE, THE ALKOXY GROUP IN THE 1-ALKOXY-2-PROPANONE AND 1-ALKOXY-2-PROPANOL HAVING FROM ONE TO THREE CARBON ATOMS, TOGETHER WITH AN UNSUBSTITUTED MONOHYDRIC ALIPHATIC ALCOHOL HAVING A NORMAL BOILING POINT BETWEEN 78* AND 160*C. AND WITHIN 30*C. OF THE BOILING POINT OF THE 1-ALKOXY-2-PROPANONE, TO OBTAIN A MIXTURE OF THE ALIPHATIC ALCOHOL AND THE 1-ALKOXY-2-PROPANONE AS DISTILLATE AND TO OBTAIN A RESIDUE WHICH IS RICHER THAN THE STARTING MATERIAL IN THE 1-ALKOXY-2-PROPANOL.
Claim 2
Independent Claim
96 words
A METHOD WHICH COMPRISES SUBJECTING TO FRACTIONAL DISTILLATION A MIXTURE OF A 1-ALKOXY-2-PROPANONE AND THE CORRESPONDING 1-ALKOXY-2-PROPANOL THAT FORMS AN AZEOTROPE WHEN DISTILLED AT APPROXIMATELY ATMOSPHERIC PRESSURE, THE ALKOXY GROUP IN THE 1-ALKOXY-2-PROPANONE AND 1-ALKOXY-2-PROPANOL HAVING FROM ONE TO THREE CARBON ATOMS, TOGETHER WITH AN UNSUBSTITUTED MONOHYDRIC ALIPHATIC ALCOHOL HAVING A NORMAL BOILING POINT BETWEEN 78* AND 160*C. AND WITHIN 30*C. OF THE BOILING POINT OF THE 1-ALKOXY-2-PROPANONE, TO OBTAIN A MIXTURE OF THE ALIPHATIC ALCOHOL AND THE 1-ALKOXY-2-PROPANONE AS DISTILLATE AND TO OBTAIN A RESIDUE WHICH IS RICHER THAN THE STARTING MATERIAL IN THE 1-ALKOXY-2-PROPANOL.
References Cited (Backward Citations)
US2080194A
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US2170855A
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US2324255A
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US2265939A
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US2617757A
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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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |