US2681882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic distillation of alcohols from methyl nu-butyl ketone
Assignee: Stanolind Oil and Gas Co
•
Filing: 1949-05-28
•
Granted: 1954-06-22
•
Expires: 1969-05-28
Abstract
No abstract record available.
Inventors
- 👤 Grekel Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:36
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82; C07C45/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR SEPARATING 1-BUTANOL FROM A MIXTURE THEREOF WITH METHYL N-BUTYL KETONE WHICH COMPRISES ADDING 1-PROPANOL AND WATER TO SAID MIXTURE IN AN AMOUNT SUCH THAT THE WEIGHT RATIO OF 1-PROPANOL TO METHYL N-BUTYL KETONE IS AT LEAST 6:1, DISTILLING THEREFROM SUBSTANTIALLY ALL OF SAID METHYL N-BUTYL KETONE AS AN AZEOTROPIC MIXTURE WITH 1-PROPANOL AND WATER, AND WITHDRAWING PURIFIED 1-BUTANOL AS A BOTTOM STREAM.
Claim 2
Dependent Claim
65 words
A PROCESS FOR SEPARATING 1-BUTANOL FROM A MIXTURE THEREOF WITH METHYL N-BUTYL KETONE WHICH COMPRISES ADDING 1-PROPANOL AND WATER TO SAID MIXTURE IN AN AMOUNT SUCH THAT THE WEIGHT RATIO OF 1-PROPANOL TO METHYL N-BUTYL KETONE IS AT LEAST 6:1, DISTILLING THEREFROM SUBSTANTIALLY ALL OF SAID METHYL N-BUTYL KETONE AS AN AZEOTROPIC MIXTURE WITH 1-PROPANOL AND WATER, AND WITHDRAWING PURIFIED 1-BUTANOL AS A BOTTOM STREAM.
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) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |