Patent US4152396A successfully refreshed from Google Patents.
US4152396A
Expired / Lapsed
US
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Separation and recovery of cobalt and nickel from aqueous solutions thereof
Assignee: Henkel Corp
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Filing: 1975-11-21
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Granted: 1979-05-01
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Expires: 1995-11-21
Abstract
Abstract Process for treating aqueous acidic solutions of cobalt and nickel values using certain fluorinated beta -diketones wherein the cobalt values are preferentially stripped from the loaded organic phase. Variations include preferential extraction of cobalt values, recovery of nickel from the raffinate and a second stripping step to recover nickel from the loaded organic.
Inventors
- 👤 Kenneth D. MacKay
- 👤 John P. McDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:01
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/306; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
139 words
A process for treating an aqueous acidic solution containing divalent cobalt and nickel values comprising contacting said solution with a solution of a fluorinated β-diketone in an essentially water-immiscible organic solvent to extract at least a portion of the metal values into the organic phase, separating the organic phase from the aqueous phase and preferentially stripping cobalt values from the loaded organic phase using an aqueous acidic stripping medium, said fluorinated β-diketone having the formula ##STR3## 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 cobalt and nickel complexes thereof to be soluble at a level of at least 2% by weight in the solvent.
Claim 2
Dependent Claim
139 words
A process for treating an aqueous acidic solution containing divalent cobalt and nickel values comprising contacting said solution with a solution of a fluorinated β-diketone in an essentially water-immiscible organic solvent to extract at least a portion of the metal values into the organic phase, separating the organic phase from the aqueous phase and preferentially stripping cobalt values from the loaded organic phase using an aqueous acidic stripping medium, said fluorinated β-diketone having the formula ##STR3## 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 cobalt and nickel complexes thereof to be soluble at a level of at least 2% by weight in the solvent.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the essentially water-immiscible organic solvent is a liquid hydrocarbon.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the fluorinated β-diketone is used in an amount of about 2 to 15% by weight in the organic solvent.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the fluorinated β-diketone has the formula ##STR4##
Claim 6
Dependent Claim
43 words
The process of claim 1 wherein the organic solution also contains a long chain alcohol of 6 to 18 carbon atoms in an amount of about 1 to 20% by weight in the organic solvent sufficient to improve loading and/or increase extraction kinetics.
Claim 7
Dependent Claim
10 words
The process of claim 5 wherein the alcohol is isodecanol.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein contacting of the aqueous acidic solution containing divalent cobalt and nickel values with the fluorinated β-diketone solution is for less than about ten minutes.
Claim 9
Dependent Claim
14 words
The process of claim 8 wherein the contacting is for less than five minutes.
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein the aqueous acidic stripping medium has a pH of about 1.5 to 3.5.
Claim 11
Dependent Claim
26 words
The process of claim 10 wherein the stripping is carried out to preferentially strip cobalt values over nickel values in % stripped of at least 2:1.
Claim 12
Dependent Claim
14 words
The process of claim 10 wherein the % stripped ratio is at least 10:1.
Claim 13
Dependent Claim
16 words
The process of claim 1 wherein the stripping is completed in less than about ten minutes.
Claim 14
Dependent Claim
32 words
The process of claim 1 wherein the cobalt stripped organic phase is separated from the cobalt rich stripping medium and then subjected to a further stripping step to strip nickel values therefrom.
Claim 15
Dependent Claim
30 words
The process of claim 13 wherein the cobalt and nickel stripped organic phase is recycled for contacting further quantities of the aqueous acidic solution containing divalent cobalt and nickel values.
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) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |