US2775600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ethylene oxide from a gaseous mixture containing same
Assignee: National Research Corp
•
Filing: 1954-06-01
•
Granted: 1956-12-25
•
Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Maslan Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:32
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A PROCESS FOR SEPARATING ETHYLENE OXIDE, FORMALDEHYDE AND ACETALDEHYDE FROM AN EFFLUENT GASEOUS MIXTURE FREED OF HYDROGEN PEROXIDE AND OBTAINED FROM AN OXIDATION OF ETHANE AND RECYCLE GASES RICH IN ETHYLENE IN A LOW-TEMPERATURE, LOW-PRESSURE, NONCATALYTIC REACTION, THE IMPROVEMENT WHICH COMPRISES COMPRESSING SAID EFFLUENT GASEOUS MIXTURE TO A PRESSURE ON THE ORDER OF ABOUT 100 P. S. I., ABOSRBING A MIXTURE COMPRISING ACETALDEHYDE, FORMALDEHYDE AND ETHYLENE OXIDE THEREFROM WITH A LIQUID-ABSORBING MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND AQUEOUS SOLUTIONS OF FORMALDEHYDE MAINTAINED AT A TEMPERATURE BELOW ABOUT 20* C., AND DECOMPRESSING THE REMAINDER OF THE EFFLUENT GASEOUS MIXTURE TO RECOVER THE ENERGY CONTENT THEREFROM.
Claim 2
Dependent Claim
108 words
IN A PROCESS FOR SEPARATING ETHYLENE OXIDE, FORMALDEHYDE AND ACETALDEHYDE FROM AN EFFLUENT GASEOUS MIXTURE FREED OF HYDROGEN PEROXIDE AND OBTAINED FROM AN OXIDATION OF ETHANE AND RECYCLE GASES RICH IN ETHYLENE IN A LOW-TEMPERATURE, LOW-PRESSURE, NONCATALYTIC REACTION, THE IMPROVEMENT WHICH COMPRISES COMPRESSING SAID EFFLUENT GASEOUS MIXTURE TO A PRESSURE ON THE ORDER OF ABOUT 100 P. S. I., ABOSRBING A MIXTURE COMPRISING ACETALDEHYDE, FORMALDEHYDE AND ETHYLENE OXIDE THEREFROM WITH A LIQUID-ABSORBING MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND AQUEOUS SOLUTIONS OF FORMALDEHYDE MAINTAINED AT A TEMPERATURE BELOW ABOUT 20* C., AND DECOMPRESSING THE REMAINDER OF THE EFFLUENT GASEOUS MIXTURE TO RECOVER THE ENERGY CONTENT THEREFROM.
References Cited (Backward Citations)
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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) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |