US4022686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation process for copper ores and copper smelter slags
Assignee: Sumitomo Metal Mining Co Ltd
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Filing: 1976-02-20
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Granted: 1977-05-10
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Expires: 1996-02-20
Abstract
Abstract A flotation process in which copper ores or copper converter slags are ground and firstly have added thereto benzotriazole or alkyl benzotriazole as an activator and secondly one or more collectors selected from the group consisting of xanthates, dithiophosphates, thiocarbamate esters, dithiocarbamates, mercaptans and dixanthogens and further, if desired, a promoter such as kerosene, light oil, bunker oil or petroleum lubricant is added to improve the recovery for the flotation of copper ores or copper smelter slags.
Inventors
- 👤 Akira Arakatsu
- 👤 Hajime Nakazawa
- 👤 Hiroshi Naruse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/014; B03D1/006; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A flotation process for copper ores and copper smelter slag comprising grinding copper-bearing material, adding a compound of the following formula: ##STR2## wherein R represents one member selected from the group consisting of hydrogen atom and alkyl groups containing 1 to 20 carbon atoms to the resulting ground material and further adding at least one member selected from the group consisting of xanthates, dithiophosphates, thiocarbamate esters, dithiocarbamates, mercaptans and dixanthogens as a collector.
Claim 2
Dependent Claim
73 words
A flotation process for copper ores and copper smelter slag comprising grinding copper-bearing material, adding a compound of the following formula: ##STR2## wherein R represents one member selected from the group consisting of hydrogen atom and alkyl groups containing 1 to 20 carbon atoms to the resulting ground material and further adding at least one member selected from the group consisting of xanthates, dithiophosphates, thiocarbamate esters, dithiocarbamates, mercaptans and dixanthogens as a collector.
Claim 3
Dependent Claim
31 words
A process according to claim 1 comprising further adding at least one member selected from the group consisting of kerosene, light oil, bunker oil and petroleum lubricant to said ground material.
Claim 4
Dependent Claim
21 words
A process according to claim 1 wherein said material is ground to form a particle size of finer than 48 mesh.
Claim 5
Dependent Claim
14 words
A process according to claim 1 comprising adding a frother to said ground material.
Claim 6
Dependent Claim
31 words
A process according to claim 1 in which said xanthate is one member selected from the group consisting of sodium-, potassium- and ammonium-salt of xanthic acid and esters of xanthic acid.
Claim 7
Dependent Claim
26 words
A process according to claim 1 in which said dithiophosphate is one member selected from the group consisting of sodium-, potassium- and ammonium-salt of dithiophosphoric acid.
Claim 8
Dependent Claim
29 words
A process according to claim 1 in which said dithiocarbamate is one member selected from the group consisting of sodium-, potassium- and ammonium-salt of dithiocarbamic acid and dithiocarbamate esters.
Claim 9
Dependent Claim
26 words
A process according to claim 1 in which said mercaptan is one member selected from the group consisting of mercapto-benzothiazole and sodium-, potassium- and ammonium-salt thereof.
Claim 10
Dependent Claim
32 words
A process according to claim 1 wherein said R is an alkyl group composed of 3 to 20 carbon atoms and selected from the group consisting of straight chain and branched chain.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |