US4461701A
Expired / Lapsed
US
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Process for rutile flotation by means of N-benzoyl-N-phenylhydroxylamine as a selective collector
Assignee: Consiglio Nazionale delle Richerche
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Filing: 1983-02-14
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Granted: 1984-07-24
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Expires: 2003-02-14
Abstract
Abstract A process for rutile flotation from rutile ores associated with iron containing components, in which process an alcoholic solution is employed of N-benzoyl-N-phenylhydroxylamine as a flotation collector of rutile. This process is especially suitable for rutile separation by flotation from rutile-hematite ores, with the use of said selective collector at pH values between 1 and 2.5.
Inventors
- 👤 Giorgio Rinelli
- 👤 Anna M. Marabini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:12
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/02; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A process for rutile flotation from rutile ores associated with iron bearing components, characterized in that an alcoholic solution of N-benzoyl-N-phenyl-hydroxylamine is employed as a selective flotation collector of rutile.
Claim 2
Dependent Claim
30 words
A process for rutile flotation from rutile ores associated with iron bearing components, characterized in that an alcoholic solution of N-benzoyl-N-phenyl-hydroxylamine is employed as a selective flotation collector of rutile.
Claim 3
Dependent Claim
47 words
A process for rutile flotation according to claim 1 for rutile separation from rutile-hematite ores, characterized in that said selective flotation collector of rutile is made up of a N-benzoyl-M-phenylhydroxylamine solution in ethyl alcohol, the flotation process being carried out at a pH between 1 and 2.5.
Claim 4
Dependent Claim
24 words
A process for rutile flotation from rutile-hematite ores according to claim 2, characterized in that the N-benzoyl-N-phenylhydroxylamine concentration is higher than 2×10 -2 moles/l.
References Cited (Backward Citations)
SU871831A1
Cited
US4362615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |