US3635337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating floated solids
Assignee: BASF Catalysts LLC
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Filing: 1968-08-23
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Granted: 1972-01-18
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Expires: 1988-08-23
Abstract
Abstract To prevent the flotation of a mineral containing an anionic collector reagent, the coated mineral is formed into a thick alkaline pulp containing another mineral having a greater affinity for the collector and an alkaline dispersant at a high concentration. The pulp is aged and then diluted and aerated. The mineral having the greater affinity for the anionic reagent floats; the other mineral is depressed.
Inventors
- 👤 Venacio Mercade
- 👤 Samuel R Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:28
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
The method of claim 1 in which said alkaline earth carbonate is calcium carbonate.
Claim 2
Dependent Claim
23 words
The method of claim 2 wherein said mass has a solids content within the range of 70 to 80 percent during said aging.
Claim 3
Dependent Claim
19 words
The method of claim 2 wherein both of said minerals contain a substantial portion of minus 325 mesh particles.
Claim 4
Dependent Claim
11 words
The method of claim 4 wherein said oxide mineral is pyrolusite.
Claim 5
Dependent Claim
25 words
The method of claim 4 wherein said alkaline deflocculating agent comprises sodium silicate and wherein total concentration of deflocculating agent is at least 50 grams/liter.
Claim 6
Dependent Claim
17 words
The method of claim 6 wherein said carbonate mineral includes calcium carbonate present as an ore constituent.
Claim 7
Dependent Claim
11 words
The method of claim 4 wherein said oxide mineral is Titania.
Claim 8
Dependent Claim
17 words
The method of claim 8 wherein said Titania is present in the form of yellow colored anatase.
Claim 9
Dependent Claim
39 words
The method of claim 9 wherein said alkaline earth metal carbonate mineral is calcite which is added to an ore pulp containing said anatase for the purpose of aiding the flotation of said anatase with said fatty acid collector.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |