US4529580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal aluminum hydride production
Assignee: Albemarle Corp
•
Filing: 1983-05-20
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Granted: 1985-07-16
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Expires: 2003-05-20
Abstract
Abstract A process for the production of alkali metal aluminum tetrahydrides from aluminum and alkali metal. The reactants, preferably in stoichiometric proportions, are pressure hydrogenated in an ether reaction medium in the presence of an aluminum-containing catalyst.
Inventors
- 👤 Gunner E. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:05
CPC Classifications
C; C01; C01B; C01B6/00; C01B6/24; C01B6/243
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A process for the production of an alkali metal aluminum tetrahydride comprising pressure hydrogenating stoichiometric proportions of alkali metal reactant and aluminum in an ether reaction medium in the presence of an aluminate catalyst formed by heating an alkali metal aluminum tetrahalide, an aluminum trihalide, or an aluminum alkyl under hydrogen pressure in the presence of alkali metal and aluminum; and forming product alkali metal aluminum tetrahydride wherein the reaction is carried to completion whereby no heel remains to be separated.
Claim 2
Dependent Claim
81 words
A process for the production of an alkali metal aluminum tetrahydride comprising pressure hydrogenating stoichiometric proportions of alkali metal reactant and aluminum in an ether reaction medium in the presence of an aluminate catalyst formed by heating an alkali metal aluminum tetrahalide, an aluminum trihalide, or an aluminum alkyl under hydrogen pressure in the presence of alkali metal and aluminum; and forming product alkali metal aluminum tetrahydride wherein the reaction is carried to completion whereby no heel remains to be separated.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said catalyst is formed from an aluminum trihalide.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein said aluminum trihalide is AlCl 3 .
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said ether reaction medium is a polyether.
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein said polyether is a diloweralkyl ether of an alkylene glycol.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein said diloweralkyl ether of an alkylene glycol is a diloweralkyl ether of an ethylene glycol.
Claim 8
Dependent Claim
20 words
The process of claim 6 wherein said diloweralkyl ether of an ethylene glycol is the dimethyl ether of diethylene glycol.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein said ether reaction medium is a mixture of an ether and a hydrocarbon.
Claim 10
Dependent Claim
22 words
The process of claim 8 wherein said ether reaction medium is a mixture of toluene and the dimethyl ether of diethylene glycol.
Claim 11
Dependent Claim
19 words
The process of claim 9 wherein the ratio of toluene to dimethyl ether of diethylene glycol is about 1:1.
Claim 12
Dependent Claim
12 words
The process of claim 1 wherein the alkali metal reactant is sodium.
Claim 13
Dependent Claim
14 words
The process of claim 11 wherein said catalyst is formed from AlCl 3 .
Claim 14
Dependent Claim
12 words
The process of claim 12 wherein said ether reaction medium comprises diglyme.
Claim 15
Dependent Claim
14 words
The process of claim 13 wherein said ether reaction medium further comprises a hydrocarbon.
Claim 16
Dependent Claim
10 words
The process of claim 14 wherein said hydrocarbon is toluene.
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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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |