US3878286A
Expired / Lapsed
US
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Process for recovering copper from aqueous solutions
Assignee: Colorado School of Mines
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Filing: 1973-06-25
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Granted: 1975-04-15
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Expires: 1993-06-25
Abstract
Abstract A process is disclosed for recovering copper from an aqueous solution containing a copper salt, as well as other metal salts, which comprises contacting the aqueous solution with a waterimmiscible organic solution containing a hydroxy-oxime selective extractant for copper, and thereafter stripping the copper from the organic solution. In this particular process, the speed of extraction, the breadth of the pH range for extraction, the Cu/Fe ratio and the efficiency in stripping the copper from the organic solution are all improved considerably by having a small amount of a sulfo compound, preferably a dialkyl sulfosuccinate, present in the organic solution. The copper is recovered in a form suitable for electrolytic deposition of metallic copper.
Inventors
- 👤 Edmond A Morin
- 👤 Hal D Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:12
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/40; C22B3/402; C22B3/404; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
17 words
IN THE PROCESS FOR THE RECOVERY OF COPPER VALUE FROM AN AQUEOUS SOLUTION COMPRISING THE STEPS OF
Claim 2
Dependent Claim
17 words
IN THE PROCESS FOR THE RECOVERY OF COPPER VALUE FROM AN AQUEOUS SOLUTION COMPRISING THE STEPS OF
Claim 3
Dependent Claim
77 words
CONTACTING SAID AQUEOUS SOLUTION WITH AN ORGANIC PHASE TO EXTACT AT LEAST A PORTION OF THE COPPER VALUES IN THE ORGANIC PHASE, THE ORGANIC PHASE COMPRISING A LIQUID HYDROCARBON AND A HYDROXYOXIME HAVING A SOLUBILITY OF AT LEAST 2 PERCENT BY WEIGHT IN THE LIQUID HYDROCARBON SELECTED FROM THE CLASS CONSISTING OF A. AN ALKYL SUBSTITUTED, ETHYLENICALLY UNSATURATED SUBSTITUTE AND ALKYL OR ETHYLENICALLY UNSATURATED ALIPHATIC ETHER SUBSTITUTED 2-HYDROXY BENZOPHEBOXIME, AND B. AN A-HYDROXY OXIME HAVING THE FORMULA
Claim 4
Dependent Claim
77 words
CONTACTING SAID AQUEOUS SOLUTION WITH AN ORGANIC PHASE TO EXTACT AT LEAST A PORTION OF THE COPPER VALUES IN THE ORGANIC PHASE, THE ORGANIC PHASE COMPRISING A LIQUID HYDROCARBON AND A HYDROXYOXIME HAVING A SOLUBILITY OF AT LEAST 2 PERCENT BY WEIGHT IN THE LIQUID HYDROCARBON SELECTED FROM THE CLASS CONSISTING OF A. AN ALKYL SUBSTITUTED, ETHYLENICALLY UNSATURATED SUBSTITUTE AND ALKYL OR ETHYLENICALLY UNSATURATED ALIPHATIC ETHER SUBSTITUTED 2-HYDROXY BENZOPHEBOXIME, AND B. AN A-HYDROXY OXIME HAVING THE FORMULA
Claim 5
Dependent Claim
13 words
SEPARATING THE RESULTANT COPPER-PREGNANT ORGANIC PHASE AND THE RESULTANT COPPER-BARREN AQUEOUS PHASE; AND
Claim 6
Dependent Claim
13 words
SEPARATING THE RESULTANT COPPER-PREGNANT ORGANIC PHASE AND THE RESULTANT COPPER-BARREN AQUEOUS PHASE; AND
Claim 7
Dependent Claim
13 words
separating the resultant copper-pregnant organic phase and the resultant copper-barren aqueous phase; and
Claim 8
Dependent Claim
13 words
separating the resultant copper-pregnant organic phase and the resultant copper-barren aqueous phase; and
Claim 9
Dependent Claim
15 words
The process of claim 1 in which the hydroxyoxime is a 2-hydroxybenzophenoxime having the formula
Claim 10
Dependent Claim
110 words
recovering the copper-pregnant organic phase; the improvement comprising the presence of 0.05-1.3 parts by weight per 100 parts by weight of hydroxyoxime of a sulfo compound selected from the class consisting of i. A dialkyl sulfosuccinate wherein said alkyl groups each have 5-30 carbon atoms; ii. an alkylated naphthalenesulfonic acid having 1-3 alkyl groups and a total of 8-30 carbon atoms in said alkyl groups; and iii. an alkyl sulfate of the formula Alkyl-OSO2OH wherein the alkyl group has 12-30 carbon atoms; provided that where said sulfo compound is an alkylated naphthalene sulfonic the amount thereof may be as high as 13 parts by weight per 100 parts of hydroxyoxime.
Claim 11
Dependent Claim
110 words
recovering the copper-pregnant organic phase; the improvement comprising the presence of 0.05-1.3 parts by weight per 100 parts by weight of hydroxyoxime of a sulfo compound selected from the class consisting of i. A dialkyl sulfosuccinate wherein said alkyl groups each have 5-30 carbon atoms; ii. an alkylated naphthalenesulfonic acid having 1-3 alkyl groups and a total of 8-30 carbon atoms in said alkyl groups; and iii. an alkyl sulfate of the formula Alkyl-OSO2OH wherein the alkyl group has 12-30 carbon atoms; provided that where said sulfo compound is an alkylated naphthalene sulfonic the amount thereof may be as high as 13 parts by weight per 100 parts of hydroxyoxime.
Claim 12
Dependent Claim
103 words
RECOVERING THE COPPER-PREGNANT ORGANIC PHASE; THE IMPROVEMENT COMPRISING THE PRESENCE OF 0.05-1.3 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF HYDROXYOXIME OF A SULFO COMPOUND SELECTED FROM THE CLASS CONSISTING OF I. A DIALKYL SULFOSUCCINATE WHEREIN SAID ALKYL GROUPS EACH HAVE 5-30 CARBON ATOMS; II. AN ALKYLATED NAPHTHALENESULFONIC ACID HAVING 1-3 ALKYL GROUPS; AND SAID ALKYL GROUPS; AND III. AN ALKYL SULFATE OF THE FORMULA ALKYL-OSO2OH WHEREIN THE ALKYL GROUP HAS 12-30 CARBON ATOMS; PROVIDED THAT WHERE SAID SULFO COMPOUND IS AN ALKYLATED NAPHTHALENE SULFONIC THE AMOUNT THEREOF MAY BE AS HIGH AS 13 PARTS BY WEIGHT PER 100 PARTS OF HYDROXYOXIME.
Claim 13
Dependent Claim
103 words
RECOVERING THE COPPER-PREGNANT ORGANIC PHASE; THE IMPROVEMENT COMPRISING THE PRESENCE OF 0.05-1.3 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF HYDROXYOXIME OF A SULFO COMPOUND SELECTED FROM THE CLASS CONSISTING OF I. A DIALKYL SULFOSUCCINATE WHEREIN SAID ALKYL GROUPS EACH HAVE 5-30 CARBON ATOMS; II. AN ALKYLATED NAPHTHALENESULFONIC ACID HAVING 1-3 ALKYL GROUPS; AND SAID ALKYL GROUPS; AND III. AN ALKYL SULFATE OF THE FORMULA ALKYL-OSO2OH WHEREIN THE ALKYL GROUP HAS 12-30 CARBON ATOMS; PROVIDED THAT WHERE SAID SULFO COMPOUND IS AN ALKYLATED NAPHTHALENE SULFONIC THE AMOUNT THEREOF MAY BE AS HIGH AS 13 PARTS BY WEIGHT PER 100 PARTS OF HYDROXYOXIME.
Claim 14
Dependent Claim
23 words
The process of claim 2 in which said sulfo compound is a dialkyl sulfosuccinate wherein said alkyl groups each have 5-30 carbon atoms.
Claim 15
Dependent Claim
13 words
The process of claim 2 in which said sulfo compound is dioctyl sulfosuccinate.
Claim 16
Dependent Claim
20 words
The process of claim 4 in which there is 0.1-0.5 part of dioctyl sulfosuccinate per 100 parts of said 2-hydroxybenzophenoxime.
Claim 17
Dependent Claim
11 words
The process of claim 5 in which said 2-hydroxybenzophenoxime is 2-hydroxy-5-octylbenzophenoxime.
Claim 18
Dependent Claim
11 words
The process of claim 5 in which said 2-hydroxybenzophenoxime is 2-hydroxy-5,5''-dibutylbenzophenoxime.
Claim 19
Dependent Claim
11 words
The process of claim 5 in which said 2-hydroxybenzophenoxime is 2-hydroxy-3,5-dinonylbenzophenoxime.
Claim 20
Dependent Claim
11 words
The process of claim 5 in which said 2-hydroxybenzophenoxime is 2-hydroxy-5-nonylbenzophenoxime.
Claim 21
Dependent Claim
11 words
The process of claim 5 in which said 2-hydroxybenzophenoxime is 2-hydroxy-5-nonyl-2'',5''-dimethylbenzophenoxime.
Claim 22
Dependent Claim
52 words
The process of claim 1 in which the hydroxyoxime is a mixture of said substituted 2-hydroxy benzophenoxime and said Alpha -hydroxy oxime, the total of said oximes comprising 2-50 percent by weight of said organic phase and said Alpha -hydroxyoxime comprising 2-50 percent by weight or the combined weight of said oximes.
Claim 23
Dependent Claim
13 words
The process of claim 11 in which said sulfocompound is a dialkyl sulfosuccinate.
Claim 24
Dependent Claim
12 words
The process of claim 12 in which said sulfocompound is dioctyl sulfosuccinate.
Claim 25
Dependent Claim
13 words
The process of claim 12 in which said 2-hydroxy benzophenoxime has the formula
Claim 26
Dependent Claim
12 words
The process of claim 14 in which said sulfocompound is dioctyl sulfosuccinate.
Claim 27
Dependent Claim
12 words
The process of claim 14 in which said Alpha -hydroxyoxime is 5,8-diethyl-7-hydroxydodecan-6-oxime.
Claim 28
Dependent Claim
12 words
The process of claim 14 in which said Alpha -hydroxyoxime is 19-hydroxyhexatriaconte-9,27-dien-18-oxime.
Claim 29
Dependent Claim
12 words
The process of claim 1 in which said liquid hydrocarbon is kerosene.
Claim 30
Dependent Claim
19 words
The process of claim 1 in which said copper values are stripped from said organic phase by an acid.
Claim 31
Dependent Claim
12 words
The process of claim 1 in which said acid is sulfuric acid.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |