Patent US3055901A successfully refreshed from Google Patents.
US3055901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aminoethylpiperazine
Assignee: Jefferson Chemical Co Inc
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Filing: 1961-05-18
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Granted: 1962-09-25
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Expires: 1981-05-18
Abstract
No abstract record available.
Inventors
- 👤 George P Speranza
- 👤 Lichtenwalter Myrl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:18
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A METHOD WHICH COMPRISES THE STEPS OF CONTACTING TRIETHYLENETETRAMINE OR MIXTURES RICH IN TRIETHYLENETETRAMINE WITH FROM ABOUT 1 TO 10 MOLS OF AMMONIA PER MOL OF TRIETHYLENETETRAMINE FOR A PERIOD OF TIME WITHIN THE RANGE OF 0.5 TO 2 HOURS WITH A HYDROGENATION CATALYST UNDER REACTION CONDITIONS INCLUDING A TEMPERATURE WITHIN THE RANGE OF ABOUT 150* TO ABOUT 300*C. AND A PRESSURE WITHIN THE RANGE OF ABOUT 1500 TO ABOUT 5000 P.S.I.G. TO FORM A REACTION MIXTURE CONTAINING AMINOETHYLPIPERAZINE AS THE PRINCIPAL PRODUCT OF THE REACTION AND RECOVERING SAID AMINOETHYLPIPERAZINE FROM SAID REACTION PRODUCT, SAID HYDROGENATION CATALYST CONSISTING ESSENTIALLY OF FROM ABOUT 60 TO ABOUT 100 WT. PERCENT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL AND MIXTURES THEREOF, AND FROM ABOUT 0 TO ABOUT 40 WT. PERCENT OF A PROMOTER SELECTED FROM THE GROUP CONSISTING OF COPPER, COPPER OXIDE, CHROMIUM OXIDE, MANGANESE OXIDE, MOLYBDENUM OXIDE, THORIUM OXIDE AND MIXTURES THEREOF.
Claim 2
Independent Claim
154 words
A METHOD WHICH COMPRISES THE STEPS OF CONTACTING TRIETHYLENETETRAMINE OR MIXTURES RICH IN TRIETHYLENETETRAMINE WITH FROM ABOUT 1 TO 10 MOLS OF AMMONIA PER MOL OF TRIETHYLENETETRAMINE FOR A PERIOD OF TIME WITHIN THE RANGE OF 0.5 TO 2 HOURS WITH A HYDROGENATION CATALYST UNDER REACTION CONDITIONS INCLUDING A TEMPERATURE WITHIN THE RANGE OF ABOUT 150* TO ABOUT 300*C. AND A PRESSURE WITHIN THE RANGE OF ABOUT 1500 TO ABOUT 5000 P.S.I.G. TO FORM A REACTION MIXTURE CONTAINING AMINOETHYLPIPERAZINE AS THE PRINCIPAL PRODUCT OF THE REACTION AND RECOVERING SAID AMINOETHYLPIPERAZINE FROM SAID REACTION PRODUCT, SAID HYDROGENATION CATALYST CONSISTING ESSENTIALLY OF FROM ABOUT 60 TO ABOUT 100 WT. PERCENT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL AND MIXTURES THEREOF, AND FROM ABOUT 0 TO ABOUT 40 WT. PERCENT OF A PROMOTER SELECTED FROM THE GROUP CONSISTING OF COPPER, COPPER OXIDE, CHROMIUM OXIDE, MANGANESE OXIDE, MOLYBDENUM OXIDE, THORIUM OXIDE AND MIXTURES THEREOF.
References Cited (Backward Citations)
US809239A
Cited
US2267686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |