US4444666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing antimony from an antimony-containing copper electrolyte
Assignee: Sumitomo Metal Mining Co Ltd
•
Filing: 1982-09-17
•
Granted: 1984-04-24
•
Expires: 2002-09-17
Abstract
Abstract The antimony in an antimony-containing copper electrolyte is removed by contacting the antimony-containing copper electrolyte with activated carbon at between room temperature and 60° C.
Inventors
- 👤 Hiroshi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:48
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12; B; B01; B01D; B01D15/00; C01; C01G; C01G30/00; C01G30/001; C02; C02F; C02F1/00; C02F1/28; C02F1/283; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S204/00; Y10S204/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
A method for the preferential removal of antimony from a copper electrolyte which contains nickel, antimony, arsenic and bismuth impurities, the method including the step of contacting said copper electrolyte with activated carbon whereby the antimony becomes associated with the activated carbon.
Claim 2
Independent Claim
42 words
A method for the preferential removal of antimony from a copper electrolyte which contains nickel, antimony, arsenic and bismuth impurities, the method including the step of contacting said copper electrolyte with activated carbon whereby the antimony becomes associated with the activated carbon.
Claim 3
Dependent Claim
39 words
The method according to claim 1, wherein the step of contacting said copper electrolyte with the activated carbon is effected by passing said copper electrolyte through a column packed with said activated carbon in the form of a bed.
Claim 4
Dependent Claim
32 words
The method according to claim 1, wherein the step of contacting said copper electrolyte with the activated carbon is effected by stirring said copper electrolyte and said activated carbon in a vessel.
Claim 5
Dependent Claim
31 words
The method according to claim 1, wherein the step of contacting said copper electrolyte with said activated carbon is carried out at a temperature ranging from room temperature to 60° C.
Claim 6
Dependent Claim
15 words
The method of claim 4, wherein said temperature ranges from room temperature to 50° C.
Claim 7
Dependent Claim
29 words
The method according to claim 1, wherein after said contacting step the activated carbon with associated antimony is contacted with hydrochloric acid so as to separate the antimony therefrom.
Claim 8
Dependent Claim
26 words
The method according to claim 1, wherein after said contacting step the activated carbon is dried and immediately burnt so as to separate the antimony therefrom.
Claim 9
Independent Claim
61 words
A method for the preferential removal of antimony from a copper electrolyte which contains nickel, antimony, arsenic and bismuth impurities, the method including the steps of contacting said copper electrolyte with activated carbon whereby the antimony becomes associated with the activated carbon, and then contacting the activated carbon having associated antimony with sodium hydroxide so as to separate the antimony therefrom.
Claim 10
Independent Claim
61 words
A method for the preferential removal of antimony from a copper electrolyte which contains nickel, antimony, arsenic and bismuth impurities, the method including the steps of contacting said copper electrolyte with activated carbon whereby the antimony becomes associated with the activated carbon, and then contacting the activated carbon having associated antimony with sodium hydroxide so as to separate the antimony therefrom.
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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |