US3655347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of extracting copper with certain substituted 2-hydroxybenzophenoximes
Assignee: General Mills Inc
•
Filing: 1970-08-12
•
Granted: 1972-04-11
•
Expires: 1990-08-12
Abstract
Abstract Certain 2-hydroxy benzophenoximes containing an electron withdrawing substituent(s). Compositions comprised of such benzophenoximes and certain Alpha -hydroxy aliphatic oximes. Compounds and compositions are useful for the extraction of metal values.
Inventors
- 👤 Philip L Mattison
- 👤 Ronald R Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:06
CPC Classifications
C; C01; C01G; C01G3/00; C01G3/003; C22; C22B; C22B15/00; C22B15/0063; C22B3/00; C22B3/20; C22B3/26; C22B3/30; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
A process according to claim 1 in which the copper values are stripped from the organic phase by means of an acid.
Claim 2
Dependent Claim
13 words
A process according to claim 2 in which the acid is sulfuric acid.
Claim 3
Dependent Claim
28 words
A process according to claim 1 in which the acidic aqueous solution has an equilibrium pH of less than about 1.0 after the contacting with the organic phase.
Claim 4
Dependent Claim
17 words
A process according to claim 1 in which the essentially water-immiscible organic solvent is a liquid hydrocarbon.
Claim 5
Dependent Claim
13 words
A process according to claim 5 in which the liquid hydrocarbon is kerosene.
Claim 6
Dependent Claim
23 words
A process according to claim 1 in which the organic phase contains about 2 to 50 percent by weight of the substituted 2-hydroxybenzophenoxime.
Claim 7
Dependent Claim
17 words
A process according to claim 1 in which R is an unsubstituted branched chain aliphatic hydrocarbon group.
Claim 8
Dependent Claim
17 words
A process according to claim 1 in which R'' is an unsubstituted branched chain aliphatic hydrocarbon group.
Claim 9
Dependent Claim
16 words
A process according to claim 1 in which the electron withdrawing substituent is a nitro group.
Claim 10
Dependent Claim
78 words
A process according to claim 1 in which the acidic aqueous solution has an equilibrium pH of less than about 1.0 after the contacting with the organic phase, the essentially water-immiscible organic solvent is kerosene, the substituted 2-hydroxybenzophenoxime is used in an amount of about 5 to 15 percent based on the weight of the organic phase, the substituted 2-hydroxybenzophenoxime is 2-hydroxy-3-nitro-5-dodecylbenzophenoxime and the copper values are stripped from the copper-pregnant organic phase by means of sulfuric acid.
Claim 11
Dependent Claim
59 words
A process according to claim 1 in which the organic phase also contains an Alpha -hydroxy aliphatic oxime having a solubility of at least about 2 percent by weight in the essentially water-immiscible organic solvent and having the formula where R1 and R2 are organic radicals and R3 is selected from the group consisting of hydrogen and organic radicals.
Claim 12
Dependent Claim
33 words
A process according to claim 12 in which the Alpha -hydroxy aliphatic oxime is employed in a proportion of 1 to 100 percent by weight based on the weight of the substituted 2-hydroxy-benzophenoxime.
Claim 13
Dependent Claim
24 words
A process according to claim 1 in which E of the formula is a chloro group in the ortho position to the hydroxyl group.
References Cited (Backward Citations)
US3088799A
Cited
US3055754A
Cited
US3197274A
Cited
US3224873A
Cited
US3428449A
Cited
US3284501A
Cited
US3294842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |