US4124584A
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Process of manufacturing sodium lactamoaluminates
Assignee: Czech Academy of Sciences
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Filing: 1976-12-02
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Granted: 1978-11-07
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Expires: 1996-12-02
Abstract
Abstract A process of manufacturing sodium lactamoaluminates by reacting an excess of a lactam in an aromatic hydrocarbon with at least one compound selected from sodium tetrahydridoaluminate, trisodium hexahydridoaluminate, sodium dihydrido-bis(2-methoxyethoxo)aluminate, and sodium tetraamidoaluminate.
Inventors
- 👤 Bohuslav Casensky
- 👤 Jiri Machacek
- 👤 Otomar Kriz
- 👤 Vladimir Kubanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:48
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
122 words
A process of manufacturing sodium lactamoaluminates of the general formula Na Al (OCH.sub.2 CH.sub.2 OCH.sub.3).sub.x L.sub.4-x, wherein x is a number ranging from 0 to 2 and L is a residue derived by splitting off an active hydrogen from a lactam having the formula ##STR3## wherein n is a number ranging from 3 to 11, which comprises: reacting a lactam of the formula LH, wherein L has the meaning as defined above, in an aromatic hydrocarbon medium with at least one compound selected from the group consisting of sodium tetrahydridoaluminate, trisodium hexahydridoaluminate, sodium dihydrido-bis(2-methoxyethoxo)aluminate, and sodium tetraamidoaluminate, wherein the molar ratio of the lactam to hydride hydrogen or to the NH 2 group in the aforementioned aluminates ranges from 1:1 to 2:1.
Claim 2
Dependent Claim
122 words
A process of manufacturing sodium lactamoaluminates of the general formula Na Al (OCH.sub.2 CH.sub.2 OCH.sub.3).sub.x L.sub.4-x, wherein x is a number ranging from 0 to 2 and L is a residue derived by splitting off an active hydrogen from a lactam having the formula ##STR3## wherein n is a number ranging from 3 to 11, which comprises: reacting a lactam of the formula LH, wherein L has the meaning as defined above, in an aromatic hydrocarbon medium with at least one compound selected from the group consisting of sodium tetrahydridoaluminate, trisodium hexahydridoaluminate, sodium dihydrido-bis(2-methoxyethoxo)aluminate, and sodium tetraamidoaluminate, wherein the molar ratio of the lactam to hydride hydrogen or to the NH 2 group in the aforementioned aluminates ranges from 1:1 to 2:1.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the lactam is 6-caprolactam.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein the 6-caprolactam is reacted with sodium tetraamidoaluminate.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the solvent is selected from the group consisting of benzene, toluene and mixtures thereof.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the lactam is reacted with a composition selected from the group consisting of trisodium hexahydroaluminate and sodium tetraamidoaluminate.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the aluminum containing composition is added incrementally to a mixture containing the lactam.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein the lactam is added incrementally to a mixture containing sodium tetraamidoaluminate.
Claim 9
Dependent Claim
20 words
The process of claim 1 wherein the lactam is selected from the group consisting of 6-caprolactam, pyrrolidone, 12-laurolactam, ω-laurolactam, γ-butyrolactam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |