US2545889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of oxygenated compounds
Assignee: Celanese Corp
•
Filing: 1948-11-19
•
Granted: 1951-03-20
•
Expires: 1968-11-19
Abstract
No abstract record available.
Inventors
- 👤 Alexander F Maclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:08
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/09; C07C27/00; C07C51/41; C07C51/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
PROCESS FOR THE TREATMENT OF A CRUDE MIXTURE OF ORGANIC COMPOUNDS, WHICH COMPRISES REACTING A MIXTURE OF ORGANIC COMPOUNDS CONSISTING ESSENTIALLY OF METHYLAL, METHYL FORMATE AND A MINOR PROPORTION OF METHANOL WITH AN AQUEOUS SOLUTION OF AN ALKLI METAL HYDROXIDE TO EFFECT SAPONIFICATION OF THE METHYL FORMATE PRESENT TO YIELD FREE METHANOL AND AN ALKALI METAL FORMATE, DISTILLING THE SAPONIFICATION REACTION PRODUCT TO REMOVER METHYLAL AND METHANOL THEREFROM, AND CONCENTRATING THE AQUEOUS ALKALI METAL FORMATE SOLUTION TO FORM AN AQUEOUS SLURRY OF CRYSTALLINE ALKALI METAL FORMATE.
Claim 2
Dependent Claim
86 words
PROCESS FOR THE TREATMENT OF A CRUDE MIXTURE OF ORGANIC COMPOUNDS, WHICH COMPRISES REACTING A MIXTURE OF ORGANIC COMPOUNDS CONSISTING ESSENTIALLY OF METHYLAL, METHYL FORMATE AND A MINOR PROPORTION OF METHANOL WITH AN AQUEOUS SOLUTION OF AN ALKLI METAL HYDROXIDE TO EFFECT SAPONIFICATION OF THE METHYL FORMATE PRESENT TO YIELD FREE METHANOL AND AN ALKALI METAL FORMATE, DISTILLING THE SAPONIFICATION REACTION PRODUCT TO REMOVER METHYLAL AND METHANOL THEREFROM, AND CONCENTRATING THE AQUEOUS ALKALI METAL FORMATE SOLUTION TO FORM AN AQUEOUS SLURRY OF CRYSTALLINE ALKALI METAL FORMATE.
References Cited (Backward Citations)
US2153526A
Cited
US2042314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |