Patent US3939203A successfully refreshed from Google Patents.
US3939203A
Expired / Lapsed
US
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Certain substituted 2-hydroxybenzophenoximes and the process of extracting copper therewith
Assignee: General Mills Inc
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Filing: 1968-03-18
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Granted: 1976-02-17
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Expires: 1988-03-18
Abstract
Abstract Certain 2-hydroxy benzophenoximes containing an electron withdrawing substituent(s). Compositions comprised of such benzophenoximes and certain α-hydroxy aliphatic oximes. Compounds and compositions are useful for the extraction of metal values.
Inventors
- 👤 Phillip L. Mattison
- 👤 Ronald R. Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:25
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/04; C07D319/08; C01; C01G; C01G3/00; C01G3/003; C07C; C07C205/00; C07C205/45; C07C251/00; C07C251/32; C07C251/34; C07C251/48; C07C45/00; C07C45/008; C07C45/45; C07C45/46; C07C45/51; C07C45/54; C07C49/00; C07C49/76; C07C49/82; C07C49/83; C07F; C07F1/00; C07F1/005; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/30; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
144 words
A compound of the formula ##SPC6## in which R and R' may be individually alike or different and are saturated aliphatic hydrocarbon groups of 1-25 carbon atoms, E is an electron withdrawing substituent, p is 1, 2, 3 or 4, m is 0 or a whole integer up to 4-p and n is 0, 1, 2, 3 or 4, said compound having a total of 3-25 carbon atoms in R m and R' n and said electron withdrawing substituent E p (1) having an electron withdrawing capacity such that a phenol containing only said substituent has an acid ionization constant Ka of at least about 50 × 10 - 10 and (2) being so selected and positioned on the aromatic ring to substantially increase the efficiency of the compound as a copper extractant from aqueous solutions having a pH of less than about 1.0.
Claim 2
Dependent Claim
144 words
A compound of the formula ##SPC6## in which R and R' may be individually alike or different and are saturated aliphatic hydrocarbon groups of 1-25 carbon atoms, E is an electron withdrawing substituent, p is 1, 2, 3 or 4, m is 0 or a whole integer up to 4-p and n is 0, 1, 2, 3 or 4, said compound having a total of 3-25 carbon atoms in R m and R' n and said electron withdrawing substituent E p (1) having an electron withdrawing capacity such that a phenol containing only said substituent has an acid ionization constant Ka of at least about 50 × 10 - 10 and (2) being so selected and positioned on the aromatic ring to substantially increase the efficiency of the compound as a copper extractant from aqueous solutions having a pH of less than about 1.0.
Claim 3
Dependent Claim
16 words
A compound according to claim 1 in which R' is a branched chain aliphatic hydrocarbon group.
Claim 4
Dependent Claim
16 words
A compound according to claim 1 in which R is a branched chain aliphatic hydrocarbon group.
Claim 5
Dependent Claim
16 words
A compound according to claim 1 in which the electron withdrawing substituent is a nitro group.
Claim 6
Dependent Claim
1 words
2-Hydroxy-3-nitro-5-dodecylbenzophenoxime.
Claim 7
Dependent Claim
1 words
2-Hydroxy-3-nitro-5-dodecylbenzophenoxime.
Claim 8
Dependent Claim
1 words
2-Hydroxy-3-nitro-4'-isopropylbenzophenoxime.
Claim 9
Dependent Claim
1 words
2-Hydroxy-3-nitro-4'-isopropylbenzophenoxime.
Claim 10
Dependent Claim
1 words
2-Hydroxy-5-nitro-4'-isopropylbenzophenoxime.
Claim 11
Dependent Claim
1 words
2-Hydroxy-5-nitro-4'-isopropylbenzophenoxime.
Claim 12
Dependent Claim
1 words
2-Hydroxy-3-methyl-5-nitro-4'-dodecylbenzophenoxime.
Claim 13
Dependent Claim
1 words
2-Hydroxy-3-methyl-5-nitro-4'-dodecylbenzophenoxime.
References Cited (Backward Citations)
GB799742A
Cited
US3428449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |