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US4022809A
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Process for the preparation of poly-N-alkyliminoalanes
Assignee: SnamProgetti SpA
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Filing: 1974-11-15
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Granted: 1977-05-10
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Expires: 1994-11-15
Abstract
Abstract A poly-N-alkyliminoalane containing repeated imine units of the type ##STR1## wherein R is an aliphatic radical, is prepared by reacting an alane of an alkali or alkali-earth metal with a primary amine in the presence of a hydrocarbon solvent.
Inventors
- 👤 Salvatore Cucinella
- 👤 Giovanni Dozzi
- 👤 Alessandro Mazzei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A process of preparing a poly-N-alkyliminoalane containing repeated units represented by the formula ##STR3## in which R is an aliphatic, cycloaliphatic or aromatic radical, which consists in reacting an alanate of an alkali or alkali-earth metal with a primary amine in the presence of a solvent selected from the aliphatic, cycloaliphatic and aromatic hydrocarbons, in an inert atmosphere, in the temperature range of from -20° to 250° C and in the pressure range of from atmospheric pressure to the vapor pressure of said solvent under the process conditions.
Claim 2
Dependent Claim
88 words
A process of preparing a poly-N-alkyliminoalane containing repeated units represented by the formula ##STR3## in which R is an aliphatic, cycloaliphatic or aromatic radical, which consists in reacting an alanate of an alkali or alkali-earth metal with a primary amine in the presence of a solvent selected from the aliphatic, cycloaliphatic and aromatic hydrocarbons, in an inert atmosphere, in the temperature range of from -20° to 250° C and in the pressure range of from atmospheric pressure to the vapor pressure of said solvent under the process conditions.
Claim 3
Dependent Claim
40 words
A process for the preparation of a poly-N-alkyliminoalane as claimed in claim 1 wherein said alanate is a member of the group consisting of LiAlH 4 , NaAlH 4 , Li 3 AlH 6 , Na 3 AlH 6 .
Claim 4
Dependent Claim
32 words
A process for the preparation of a poly-N-alkyliminoalane as claimed in claim 1 wherein said primary amine is a member of the group consisting of the primary aliphatic, cycloaliphatic and aromatic amines.
Claim 5
Dependent Claim
17 words
A process of preparing a poly-N-alkyliminialane as claimed in claim 1, wherein R is an aliphatic radical.
Claim 6
Dependent Claim
17 words
A process of preparing a poly-N-alkyliminoalane as claimed in claim 1, wherein said primary amine is isopropylamine.
References Cited (Backward Citations)
US3255169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |