Patent US3726925A successfully refreshed from Google Patents.
US3726925A
Expired / Lapsed
US
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Preparation of trialkylamines
Assignee: Union Oil Company of California
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Filing: 1970-06-24
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Granted: 1973-04-10
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Expires: 1990-06-24
Abstract
Abstract A trialkylamine is prepared by contacting a dialkylamine with a liquid reaction medium containing a ruthenium, osmium, rhenium or technetium metal catalyst, preferably in complex association with a biphyllic ligand at a temperature of 50*-400* C. A typical reaction comprises contacting dibutylamine with ruthenium trichloride and triphenylphosphine to produce tributylamine and butylamine.
Inventors
- 👤 D Fenton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/64
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
The process of claim 1 wherein at least one of said R groups of said ligand is monocyclic aryl.
Claim 2
Dependent Claim
19 words
The process of claim 1 wherein at least two of said R groups of said ligand are monocyclic aryl.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said biphyllic liganD is a triarylphosphine.
Claim 4
Dependent Claim
11 words
The process of claim 4 wherein said biphyllic ligand is triphenylphosphine.
Claim 5
Dependent Claim
18 words
The process of claim 4 wherein the trialkylamine is a fatty amine having 2 to about 14 carbons.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein said dialkylamine is dibutylamine.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said temperature is maintained at 80*-250* C.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said pressure is maintained at 1 to 30 atmospheres.
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |