US3918962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for winning copper using carbon monoxide
Assignee: Ethyl Corp
•
Filing: 1974-10-04
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Granted: 1975-11-11
•
Expires: 1994-10-04
Abstract
Abstract Process of winning copper from chloride containing solutions by treating with carbon monoxide. Process makes copper separable from iron, and can be applied to leach solutions prepared by treating sulfide ores with HCl in the presence of air or oxygen.
Inventors
- 👤 Michael Dubeck
- 👤 Suk Joong Im
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:48
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0002; C22B15/001; C22B15/0021; C22B15/0004; C22B15/0006; C22B15/0063; C22B15/0065; C22B15/0067; C22B15/0069; C22B15/0084; C22B15/0089; C22B15/0093; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
20 words
A PROCESS FOR RECOVERING COPPER METAL FROM AN ACIDIC SOLUTION CONTAINING COPPER IONS, IRON IONS AND CHLORIDE IONS WHICH COMPRISES
Claim 2
Dependent Claim
20 words
A PROCESS FOR RECOVERING COPPER METAL FROM AN ACIDIC SOLUTION CONTAINING COPPER IONS, IRON IONS AND CHLORIDE IONS WHICH COMPRISES
Claim 3
Dependent Claim
26 words
TREATING SAID SOLUTION WITH A CARBON MONOXIDE CONTAINING GAS AT ELEVATED TEMPERATURES AND PRESSURES FOR A TIME SUFFICIENT TO FORM A COPPER-CONTAINING COMPLEX AS A PRECAPITATE,
Claim 4
Dependent Claim
26 words
TREATING SAID SOLUTION WITH A CARBON MONOXIDE CONTAINING GAS AT ELEVATED TEMPERATURES AND PRESSURES FOR A TIME SUFFICIENT TO FORM A COPPER-CONTAINING COMPLEX AS A PRECAPITATE,
Claim 5
Dependent Claim
7 words
separating said precipitated complex from said solution,
Claim 6
Dependent Claim
7 words
separating said precipitated complex from said solution,
Claim 7
Dependent Claim
12 words
A process of claim 1 wherein said solution is an aqueous solution.
Claim 8
Dependent Claim
7 words
SEPARATING SAID PRECIPITATED COMPLEX FROM SAID SOLUTION,
Claim 9
Dependent Claim
7 words
SEPARATING SAID PRECIPITATED COMPLEX FROM SAID SOLUTION,
Claim 10
Dependent Claim
9 words
HEATING SAID PRECIPITATED COMPLEX TO OBTAIN COPPER CHLORIDE, AND
Claim 11
Dependent Claim
9 words
HEATING SAID PRECIPITATED COMPLEX TO OBTAIN COPPER CHLORIDE, AND
Claim 12
Dependent Claim
27 words
A process of claim 2 wherein there is at least one gram ion of chloride ion available for bonding with each gram atom of said copper ions.
Claim 13
Dependent Claim
9 words
heating said precipitated complex to obtain copper chloride, and
Claim 14
Dependent Claim
9 words
heating said precipitated complex to obtain copper chloride, and
Claim 15
Dependent Claim
12 words
reducing said copper chloride, whereby copper metal of high purity is obtained.
Claim 16
Dependent Claim
12 words
reducing said copper chloride, whereby copper metal of high purity is obtained.
Claim 17
Dependent Claim
15 words
A process of claim 3 wherein said copper ions are in the cuprous valence state.
Claim 18
Dependent Claim
12 words
REDUCING SAID COPPER CHLORIDE, WHEREBY COPPER METAL OF HIGH PURITY IS OBTAINED.
Claim 19
Dependent Claim
12 words
REDUCING SAID COPPER CHLORIDE, WHEREBY COPPER METAL OF HIGH PURITY IS OBTAINED.
Claim 20
Dependent Claim
19 words
A process of claim 3 being conducted under carbon monoxide pressure of from about 100 to about 1500 psia.
Claim 21
Dependent Claim
12 words
A process of claim 1 wherein the copper chloride is cuprous chloride.
Claim 22
Dependent Claim
20 words
A process of claim 6 wherein the cuprous chloride is reduced by heating in the presence of a reducing agent.
Claim 23
Dependent Claim
24 words
A process of claim 7 wherein the reducing agent is a gas selected from the group consisting of hydrogen, carbon monoxide, or synthesis gas.
Claim 24
Dependent Claim
18 words
A process of claim 6 wherein the cuprous chloride is heated in the presence of carbon and steam.
Claim 25
Dependent Claim
14 words
The process of claim 6 further including forming pellets of cuprous chloride and carbon.
Claim 26
Dependent Claim
12 words
The process of claim 10 wherein said pellets are treated with steam.
Claim 27
Dependent Claim
18 words
The process of claim 10 wherein said pellets are exposed to a mixture of steam and carbon monoxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |