US4748260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of amine alanes
Assignee: Albemarle Corp
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Filing: 1986-12-22
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Granted: 1988-05-31
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Expires: 2006-12-22
Abstract
Abstract Process for the preparation of silane and a tertiary amine alane, said process comprising reacting about equimolar amounts of: (a) an alkali metal aluminum tetrahydride having the formula MAlH 4 , wherein M is an alkali metal selected from the class consisting of lithium, sodium and potassium, (b) a hydrogen halide, and (c) a complexing tertiary amine. In this process, NaAlH 4 , HCl, and (C 2 H 5 ) 3 N are preferred reactants. The amine alane product can be reacted with a silicon halide to prepare silane.
Inventors
- 👤 Everett M. Marlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:06
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
Process for the preparation of a tertiary amine alane, said process comprising reacting about equimolar amounts of: (a) an alkali metal aluminum tetrahydride having the formula MAlH 4 , wherein M is an alkali metal selected from the class consisting of lithium, sodium and potassium, (b) a hydrogen halide, and (c) a complexing tertiary amine.
Claim 2
Dependent Claim
55 words
Process for the preparation of a tertiary amine alane, said process comprising reacting about equimolar amounts of: (a) an alkali metal aluminum tetrahydride having the formula MAlH 4 , wherein M is an alkali metal selected from the class consisting of lithium, sodium and potassium, (b) a hydrogen halide, and (c) a complexing tertiary amine.
Claim 3
Dependent Claim
15 words
The process of claim 1 being conducted in the presence of a hydrocarbon reaction medium.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said hydrocarbon reaction medium is toluene.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said tetrahydride is sodium aluminum tetrahydride, NaAlH 4 .
Claim 6
Dependent Claim
23 words
Process for the preparation of triethylamine alane, said process comprising reacting NaAlH 4 , HCl and (C 2 H 5 ) 3 N.
Claim 7
Dependent Claim
23 words
Process for the preparation of triethylamine alane, said process comprising reacting NaAlH 4 , HCl and (C 2 H 5 ) 3 N.
Claim 8
Dependent Claim
30 words
The process of claim 5 being conducted in the presence of toluene as a liquid reaction medium, and at a temperature of from about 5° C. to about 50° C.
Claim 9
Dependent Claim
21 words
Process for the preparation of trimethylamine alane, said process comprising reacting NaAlH 4 , HCl and (CH 3 ) 3 N.
Claim 10
Dependent Claim
21 words
Process for the preparation of trimethylamine alane, said process comprising reacting NaAlH 4 , HCl and (CH 3 ) 3 N.
Claim 11
Dependent Claim
28 words
Process of claim 7 being conducted in the presence of toluene as a liquid reaction medium and at a temperature of about 0° C. to about 50° C.
Claim 12
Dependent Claim
14 words
The process of claim 1 being conducted in the substantial absence of an ether.
Claim 13
Dependent Claim
15 words
The process of claim 1 being conducted in the substantial absence of preformed amine hydrohalide.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |