US4356309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-Alkylated 2-(2-pyridyl)imidazoles useful as metallurgical extractants
Assignee: Huntsman Ethyleneamines Ltd
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Filing: 1981-07-13
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Granted: 1982-10-26
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Expires: 2001-07-13
Abstract
Abstract Compounds of the formula <IMAGE> wherein R1 represents C1 to C20 alkyl-substituted benzyl, or C2 to C20 alkyl which can optionally bear one or two -OR2 radicals, wherein each R2 independently represents hydrogen or the radical <IMAGE> wherein R3 represents C1 to C20 alkyl are disclosed. These compounds are useful for the selective extraction of cobalt, nickel or copper ions from aqueous acidic ore leach liquors.
Inventors
- 👤 James W. Lalk
- 👤 Frances P. Hamburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:54
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
A compound of the formula ##STR11## wherein R 1 represents C 1 to C 20 alkyl-substituted benzyl, or C 12 to C 20 alkyl which can optionally bear one or two --OR 2 radicals, wherein each R 2 independently represents hydrogen or the radical ##STR12## wherein R 3 represents C 1 to C 20 alkyl.
Claim 2
Dependent Claim
55 words
A compound of the formula ##STR11## wherein R 1 represents C 1 to C 20 alkyl-substituted benzyl, or C 12 to C 20 alkyl which can optionally bear one or two --OR 2 radicals, wherein each R 2 independently represents hydrogen or the radical ##STR12## wherein R 3 represents C 1 to C 20 alkyl.
Claim 3
Dependent Claim
14 words
The compound of claim 1 wherein R 1 is a branched chain alkyl group.
Claim 4
Dependent Claim
17 words
The compound of claim 2 wherein R 1 has from about 12 to about 20 carbon atoms.
Claim 5
Dependent Claim
15 words
The compound of claim 1 which is 1-dodecyl-2-(2-pyridyl)imidazole and which corresponds to the formula ##STR13##
Claim 6
Dependent Claim
15 words
The compound of claim 1 which is 1-(2-hydroxy-dodecyl)-2-(2-pyridyl)imidazole and which corresponds to the formula ##STR14##
Claim 7
Dependent Claim
14 words
The compound of claim 1 which is 1-[2-hexanoyloxy)dodecyl]-2-(2-pyridyl)imidazole and corresponds to the formula ##STR15##
References Cited (Backward Citations)
US4202944A
Cited
US4254087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |