Patent US4174274A successfully refreshed from Google Patents.
US4174274A
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Separation of rutile from ilmenite
Assignee: Honeywell UOP LLC
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Filing: 1978-01-12
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Granted: 1979-11-13
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Expires: 1998-01-12
Abstract
Abstract Rutile may be separated from ilmenite or ilmenite ores by agitating a mixture of ilmenite and rutile in particle form in an aqueous solution containing a collection agent to which hydrogen peroxide has been added. The slurry in agitated form is treated with air to produce a froth. The ilmenite particles will attach themselves to the air bubbles in the froth and may be skimmed off the surface of the solution, the rutile then being recovered from the solution.
Inventors
- 👤 William K. Tolley
- 👤 Beckay J. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:09
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D1/002; B03D1/008; B03D1/018; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A method for effecting the separation of ilmenite from rutile which comprises agitating a mixture of ilmenite and rutile particles in an aqueous hydrogen peroxide solution containing a collection agent selected from the group consisting of a fatty acid and an ether amine, sparging said solution with air, skimming off the resultant froth containing the ilmenite, and recovering the desired rutile.
Claim 2
Independent Claim
61 words
A method for effecting the separation of ilmenite from rutile which comprises agitating a mixture of ilmenite and rutile particles in an aqueous hydrogen peroxide solution containing a collection agent selected from the group consisting of a fatty acid and an ether amine, sparging said solution with air, skimming off the resultant froth containing the ilmenite, and recovering the desired rutile.
Claim 3
Dependent Claim
16 words
The method as set forth in claim 1 in which said fatty acid is oleic acid.
Claim 4
Dependent Claim
16 words
The method as set forth in claim 1 in which said fatty acid is stearic acid.
Claim 5
Dependent Claim
36 words
The method as set forth in claim 1 in which said hydrogen peroxide is present in an amount in the range of from about 0.01 to about 1.0 millimoles of hydrogen peroxide per liter of water.
Claim 6
Dependent Claim
24 words
The method as set forth in claim 1 in which said particles are in a size of from about -50 to about -400 mesh.
Claim 7
Dependent Claim
27 words
The method as set forth in claim 1 in which the pH of said solution is maintained in a range of from about 4 to about 7.
References Cited (Backward Citations)
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Cited
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Cited
US3353668A
Cited
GB1352306A
Cited
US3655038A
Cited
US3961940A
Cited
US3951786A
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |