US3590996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floatation of sulfide ores
Assignee: Dow Chemical Co
•
Filing: 1969-02-03
•
Granted: 1971-07-06
•
Expires: 1989-02-03
Abstract
Abstract An improvement in the concentration of ores by flotation which comprises subjecting a sulfide ore in the form of a pulp to a flotation process in the presence of an effective quantity of a flotation collector corresponding to the formula WHEREIN R and R2 are hydrocarbyl groups and R1 represents an alkylene or heteroalkylene group. Certain of the indicted compounds provide for enhanced recovery and/or selectivity of sulfide minerals of Cu, Zn, Mo, Co, Ni, Pb and As over iron sulfide. The compounds are also useful as fungicides and herbicides.
Inventors
- 👤 Guy H Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:42
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
38 words
The process as defined in claim 1 wherein R and R2 contain up to two functional groups other than in the alpha position of R2, selected from the group consisting of halo, alkoxy, cyano, acetonyl, or di-loweralkylamino group.
Claim 2
Dependent Claim
20 words
The process as defined in claim 1 wherein X is a lower alkyl group containing up to 5 carbon atoms.
Claim 3
Dependent Claim
25 words
The process as defined in claim 1 wherein from about 0.01 to about 0.25 pound of compound per ton of sulfide ore pulp is employed.
Claim 4
Dependent Claim
11 words
The process defined in claim 1 wherein said compound consists of
Claim 5
Dependent Claim
11 words
The process defined in claim 1 wherein said compound consists of
Claim 6
Dependent Claim
12 words
The process as defined in claim 1 wherein said compound consists of
Claim 7
Dependent Claim
12 words
The process as defined in claim 1 wherein said compound consists of
Claim 8
Dependent Claim
12 words
The process as defined in claim 1 wherein said compound consists of
Claim 9
Dependent Claim
12 words
The process as defined in claim 1 wherein said compound consists of
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |