Patent US2671052A successfully refreshed from Google Patents.
US2671052A
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Methyl acetate distillation
Assignee: Celanese Corp
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Filing: 1951-11-13
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Granted: 1954-03-02
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Expires: 1971-11-13
Abstract
No abstract record available.
Inventors
- 👤 Robert L Mitchell
- 👤 James W Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:19
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C45/83; C07C67/00; C07C67/48; C07C67/58; Y; Y10; Y10S; Y10S203/00; Y10S203/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
PROCESS FOR THE SEPARATION OF METHYL ACETATE FROM A MIXTURE OF ORGANIC COMPOUNDS CONTAINING METHYL ACETATE, PROPIONALDEHYDE, ACETONE, METHANOL AND OTHER ALCOHOLS, WHICH COMPRISES SUBJECTING SAID MIXTURE OF ORGANIC COMPOUNDS TO AN EXTRACTIVE DISTILLATION EMPLOYING WATER AS THE EXTRACTANT AND TAKING METHYL ACETATE OFF AS THE OVERHEAD PRODUCT, THE RESIDUAL AQUEOUS MIXTURE CONTAINING SUBSTANTIALLY ALL OF THE PROPIONALDEHYDE OF SAID MIXTURE OF ORGANIC COMPOUNDS.
Claim 2
Dependent Claim
64 words
PROCESS FOR THE SEPARATION OF METHYL ACETATE FROM A MIXTURE OF ORGANIC COMPOUNDS CONTAINING METHYL ACETATE, PROPIONALDEHYDE, ACETONE, METHANOL AND OTHER ALCOHOLS, WHICH COMPRISES SUBJECTING SAID MIXTURE OF ORGANIC COMPOUNDS TO AN EXTRACTIVE DISTILLATION EMPLOYING WATER AS THE EXTRACTANT AND TAKING METHYL ACETATE OFF AS THE OVERHEAD PRODUCT, THE RESIDUAL AQUEOUS MIXTURE CONTAINING SUBSTANTIALLY ALL OF THE PROPIONALDEHYDE OF SAID MIXTURE OF ORGANIC COMPOUNDS.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |