US4015980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of fluorinated β-diketones in the solvent extraction of zinc
Assignee: General Mills Chemicals Inc
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Filing: 1975-08-04
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Granted: 1977-04-05
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Expires: 1995-08-04
Abstract
Abstract Zinc is extracted from aqueous ammoniacal solutions using fluorinated β-diketones of the structure ##STR1## where n is a whole integer of 1 to 4, m is 0, 1 or 2 and R is an alkyl group of 1-25 carbons, the R group or groups providing requisite solubility in liquid hydrocarbon solvents.
Inventors
- 👤 Kenneth D. MacKay
- 👤 R. Brantley Sudderth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:47
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/455; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/306; C07C49/00; C07C49/76; C07C49/80; C07C49/92; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
The process of recovering zinc from an aqueous ammoniacal solution thereof which comprises contacting said solution with a solution of a fluorinated β-diketone dissolved in an essentially water immiscible liquid hydrocarbon solvent to extract at least a portion of the zinc into the organic phase, separating the organic phase from the aqueous phase and stripping zinc from the organic phase, said β-diketone having the formula ##STR6## where n is a whole integer of 1 to 4, m is 0, 1 or 2 and R is an alkyl group of 1-25 carbon atoms with the proviso that R n must provide solubility properties sufficient for the β-diketone and the resulting zinc complex thereof to be soluble at a level of at least 2% by weight in the essentially water immiscible liquid hydrocarbon solvent.
Claim 2
Dependent Claim
132 words
The process of recovering zinc from an aqueous ammoniacal solution thereof which comprises contacting said solution with a solution of a fluorinated β-diketone dissolved in an essentially water immiscible liquid hydrocarbon solvent to extract at least a portion of the zinc into the organic phase, separating the organic phase from the aqueous phase and stripping zinc from the organic phase, said β-diketone having the formula ##STR6## where n is a whole integer of 1 to 4, m is 0, 1 or 2 and R is an alkyl group of 1-25 carbon atoms with the proviso that R n must provide solubility properties sufficient for the β-diketone and the resulting zinc complex thereof to be soluble at a level of at least 2% by weight in the essentially water immiscible liquid hydrocarbon solvent.
Claim 3
Dependent Claim
9 words
The process of claim 1 wherein m is 0.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein n is 1 and the R group is in the para position.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein R contains at least 8 carbon atoms.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein R is a branched chain dodecyl group.
Claim 7
Dependent Claim
27 words
The process of claim 1 wherein the β-diketone is present in an amount of about 2 to 15% by weight based on the weight of the solvent.
References Cited (Backward Citations)
US3451807A
Cited
US3700416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |