US4170604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dialkylaluminum hydrides
Assignee: Stauffer Chemical Co
•
Filing: 1978-11-06
•
Granted: 1979-10-09
•
Expires: 1998-11-06
Abstract
Abstract Dialkylaluminum hydrides are produced by subjecting a mixed aluminum alkyl having the formula R 2 AlR' to pyrolysis. R is methyl, ethyl, n-alkyl or an alkyl group which has no hydrogen atoms on the carbon atom β to the aluminum. R' is an α - or β - branched alkyl group having the formula ##STR1## in which one R" is hydrogen and the other is alkyl and R"' is alkyl. The mixed aluminum alkyl R 2 AlR' can be obtained either by reaction of two aluminum alkyls: 2R.sub.3 Al+R'.sub.3 Al→3R.sub.2 AlR' or by reaction of a trialkylaluminum with a dialkylaluminum hydride: 2R.sub.3 Al+R'.sub.2 AlH→2R.sub.2 AlR'+R.sub.2 AlH in which case one third of the desired hydride is
Inventors
- 👤 Dennis B. Malpass
- 👤 Spencer C. Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:12
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/065
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
47 words
A compound having the formula R 2 AlH in which R is a tri-substituted alkyl group having the formula ##STR7## in which the groups R a are alkyl groups having from 1 to 5 carbon atoms, and the group R contains from 5 to 15 carbon atoms.
Claim 2
Dependent Claim
47 words
A compound having the formula R 2 AlH in which R is a tri-substituted alkyl group having the formula ##STR7## in which the groups R a are alkyl groups having from 1 to 5 carbon atoms, and the group R contains from 5 to 15 carbon atoms.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 in which R is neopentyl.
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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |