Patent US3068290A successfully refreshed from Google Patents.
US3068290A
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Process of making ethylenediamine
Assignee: Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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Filing: 1958-07-17
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Granted: 1962-12-11
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Expires: 1978-07-17
Abstract
No abstract record available.
Inventors
- 👤 Lichtenberger Robert
- 👤 Weiss Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS OF MAKING ETHYLENEDIAMINE WHICH COMPRISES REACTING IN LIQUID PHASE AT ABOUT 80 TO 170 ATOMSPHERES AT A TEMPERATURE OF 150 TO 250*C., AMMONIA AND MONOMETHANOLAMINE IN THE PRESENCE OF AN AMINATION CATALYST CONSISTING OF A MIXED MAGNESIUM OXIDE AND METALLIC NICKEL WHEREIN THE ATOMIC NI/MG RATIO IS BETWEEN 3:1 AND 1:4 SAID CATALYST BEING OBTAINED BY COPRECIPITATING A MIXTURE OF NICKEL AND MAGNESIUM SALTS SELECTED FROM THE CLASS CONSISTING OF THE FORMATES AND OXALATES, AND THEN SUBJECTING SAID MIXTURE OF COPRECIPITATED NICKEL AND MAGNESIUM SALTS TO THERMAL DECOMPOSITION TO BRING THE MAGNESIUM SALT TO THE MGO STATE AND TO REDUCE THE NICKEL SALT TO THE METALLIC STATE.
Claim 2
Dependent Claim
109 words
A PROCESS OF MAKING ETHYLENEDIAMINE WHICH COMPRISES REACTING IN LIQUID PHASE AT ABOUT 80 TO 170 ATOMSPHERES AT A TEMPERATURE OF 150 TO 250*C., AMMONIA AND MONOMETHANOLAMINE IN THE PRESENCE OF AN AMINATION CATALYST CONSISTING OF A MIXED MAGNESIUM OXIDE AND METALLIC NICKEL WHEREIN THE ATOMIC NI/MG RATIO IS BETWEEN 3:1 AND 1:4 SAID CATALYST BEING OBTAINED BY COPRECIPITATING A MIXTURE OF NICKEL AND MAGNESIUM SALTS SELECTED FROM THE CLASS CONSISTING OF THE FORMATES AND OXALATES, AND THEN SUBJECTING SAID MIXTURE OF COPRECIPITATED NICKEL AND MAGNESIUM SALTS TO THERMAL DECOMPOSITION TO BRING THE MAGNESIUM SALT TO THE MGO STATE AND TO REDUCE THE NICKEL SALT TO THE METALLIC STATE.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |