Patent US4380509A successfully refreshed from Google Patents.
Patent US3782546A successfully refreshed from Google Patents.
US3782546A
Expired / Lapsed
US
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Cationic conditioning agents for potash flotation
Assignee: Calgon Corp
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Filing: 1971-12-03
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Granted: 1974-01-01
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Expires: 1991-12-03
Abstract
Abstract An improved froth flotation process for separating sylvite from a pulp containing sylvite using a water-soluble, high molecular weight, diallyl dialkyl quaternary ammonium polymer as a slime conditioning agent is disclosed.
Inventors
- 👤 R Kirwin
- 👤 W Hart
- 👤 J Antonetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:22
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/001; B03D1/004; B03D1/008; B03D1/01; B03D1/016; B03D1/011; B03D2201/00; B03D2201/007; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
An improved potash froth flotation process comprising grinding the potash ore, mixing the ground ore with water to form an ore pulp, aerating the pulp to form a froth and collecting and processing the froth wherein the improvement comprises adding to the ore pulp during said flotation process, but prior to frothing, from about 0.001 to about 0.01 pounds per ton based on the weight of the dry ore of a water-soluble, high molecular weight, polymer consisting essentially of dimethyl diallyl ammonium chloride as a conditioning agent, said polymer having a molecular weight of at least about 10,000.
Claim 2
Dependent Claim
13 words
An improved process as in claim 2 wherein the potash ore is sylvite.
References Cited (Backward Citations)
US2923408A
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US3165465A
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US3259237A
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US3321649A
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US3408292A
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US3452867A
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |