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US4460460A
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Beneficiation of ores
Assignee: Mobil Oil AS
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Filing: 1982-04-13
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Granted: 1984-07-17
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Expires: 2002-04-13
Abstract
Abstract Beneficiation of ores, especially phosphate ores, is improved by using deionized or softened water in the conditioning step.
Inventors
- 👤 Frank Cariello
- 👤 Ross A. Kremer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:26
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; B03D1/001; B03D1/004; B03D1/006; B03D1/008; B03D1/01; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
An improved process for beneficiating phosphate ores using hard water in which there are at least two flotation steps, the first being a rougher float utilizing reagents consisting essentially of a fatty acid and a petroleum fraction and the second step being one in which reagents comprising fatty acid amine are used, the improvement comprising using deionized or softened water in the conditioning step prior to the rougher flotation, wherein hard water is used in said rougher flotation.
Claim 2
Dependent Claim
78 words
An improved process for beneficiating phosphate ores using hard water in which there are at least two flotation steps, the first being a rougher float utilizing reagents consisting essentially of a fatty acid and a petroleum fraction and the second step being one in which reagents comprising fatty acid amine are used, the improvement comprising using deionized or softened water in the conditioning step prior to the rougher flotation, wherein hard water is used in said rougher flotation.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the feed is first classified and then diluted with the deionized or softened water to a solids content of 70-75%.
Claim 4
Dependent Claim
12 words
The process of claims 1, or 2 wherein the water is deionized.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |