US3780860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of copper sulfide ores
Assignee: STEPHAN CHEM CO
•
Filing: 1971-05-17
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Granted: 1973-12-25
•
Expires: 1991-05-17
Abstract
Abstract A novel flotation promoter used in the concentration of copperbearing ores for the efficient selective flotation of copper values, including chalcopyrite, with suppression of iron pyrites; the promoter comprising a sodium sulfate of an aliphatic hydrocarbon having a carbon chain of less than 12 carbons.
Inventors
- 👤 E Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/008; B03D2201/00; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The flotation promoter of claim 1 and wherein the propylene oxide is combined in an amount approximating 10 mols.
Claim 2
Dependent Claim
28 words
The flotation promoter of claim 1 wherein ethylene oxide in an amount approximating 5 percent by weight based on said aliphatic hydrocarbon sodium sulfate is chemically combined thereiwth.
Claim 3
Dependent Claim
37 words
The flotation promoter of claim 1 wherein said aliphatic hydrocarbon sodium sulfate consists of R -(OCH2CHCH3)N-OSO3Na where R is a C8 - C10 fatty alcohol and N is in excess of 5 and not more than 10.
Claim 4
Dependent Claim
41 words
A flotation promoter for selective water flotation of thin finely ground copper-bearing sulfide ores and the suppression of iron pyrites therein consisting essentially of a reagent having the general formula R - (OCH2CHCH3)10-OSO3Na wherein R is a C8 -C10 fatty alcohol.
Claim 5
Dependent Claim
79 words
The process of mineral flotation comprising the steps of grinding a copper-bearing sulfide ore material to release the metal values from a gangue containing iron pyrites, adding water and calcium oxide to adjust the pH to about 7 to 11.5, passing air bubbles through the solution and adding flotation promoter comprising R - (OCH2CHCH3)N-OSO3Na and a frother thereto, where R is a C8 - C10 fatty alcohol and N approximates 10 and floating said copper ore from said gangue.
Claim 6
Dependent Claim
14 words
The process of claim 6 wherein the amount of flotation promoter about 0.004 lb/ton.
Claim 7
Dependent Claim
18 words
The process of claim 6 wherein at least one collector is used in combination with said flotation promoter.
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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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |