Patent US3346640A successfully refreshed from Google Patents.
US3346640A
Expired / Lapsed
US
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Preparation of monoalkylamines and dialkylamines
Assignee: Lonza AG
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Filing: 1964-07-21
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Granted: 1967-10-10
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Expires: 1984-07-21
Abstract
No abstract record available.
Inventors
- 👤 Guyer August
- 👤 Guyer Pio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:02
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE PREPARATION OF MONOALKYLAMINES AND DIALKYLAMINES COMPRISING FORCING FIRST AND ALIPHATIC ALDEHYDE INTO A REACTION OF LIQUID ANHYDROUS AMMONIA OR A MIXTURE OF LIQUID ANHYDROUS AMMONIA WITH A MONOALKYLAMINE IN THE MOLAR RATIO ALDEHYDE TO LIQUID ANHYDROUS AMMONIA OR A MIXTURE OF LIQUID ANHYDROUS AMMONIA AND A MONOALKYLAMINE OF 1:2 TO 15 AND AT A TEMPERATURE IN THE RANGE OF 0 TO 10*C., THEREBY FORMING AN ALDEHYDE-AMMONIA SOLUTION, THEN REACTING AND HYDROGENATING WITH HYDROGEN WHILE MAINTAINING SAID SOLUTION IN LIQUID PHASE UNDER A HYDROGEN PRESSURE OF AT LEAST 40 ATMOSPHERES AND A TEMPERATURE OF 70 TO 220*C. IN THE PRESENCE OF A HYDROGENATION CATALYST, AND FINALLY RECOVERING THE OBTAINED ALKYLAMINE.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE PREPARATION OF MONOALKYLAMINES AND DIALKYLAMINES COMPRISING FORCING FIRST AND ALIPHATIC ALDEHYDE INTO A REACTION OF LIQUID ANHYDROUS AMMONIA OR A MIXTURE OF LIQUID ANHYDROUS AMMONIA WITH A MONOALKYLAMINE IN THE MOLAR RATIO ALDEHYDE TO LIQUID ANHYDROUS AMMONIA OR A MIXTURE OF LIQUID ANHYDROUS AMMONIA AND A MONOALKYLAMINE OF 1:2 TO 15 AND AT A TEMPERATURE IN THE RANGE OF 0 TO 10*C., THEREBY FORMING AN ALDEHYDE-AMMONIA SOLUTION, THEN REACTING AND HYDROGENATING WITH HYDROGEN WHILE MAINTAINING SAID SOLUTION IN LIQUID PHASE UNDER A HYDROGEN PRESSURE OF AT LEAST 40 ATMOSPHERES AND A TEMPERATURE OF 70 TO 220*C. IN THE PRESENCE OF A HYDROGENATION CATALYST, AND FINALLY RECOVERING THE OBTAINED ALKYLAMINE.
References Cited (Backward Citations)
US2686811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |