US4051027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Settling clay-containing slimes
Assignee: IMC Fertilizer Inc
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Filing: 1975-12-22
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Granted: 1977-09-27
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Expires: 1995-12-22
Abstract
Abstract The settling of finely-divided solids that are in suspension in an aqueous medium due to the presence of a colloidal argillaceous mineral is enhanced by adding a small but effective amount of hydrogen peroxide to the suspension. This invention is especially useful for treating aqueous suspensions of ultrafine clay and other materials resulting from the hydraulic concentration of an ore material, such as phosphate slimes.
Inventors
- 👤 Othmer F. Batzer
- 👤 John A. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:20
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; B; B01; B01D; B01D21/00; B01D21/01; C02F1/72; C02F1/722; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/906; Y10S210/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A process for settling waste slime solids, from a phosphate are processing operation, including suspended attapulgite, montmorillonite, and fine sand from an aqueous suspension thereof, wherein said suspension contains from about 0.01% to about 35% by weight of solids, which comprises the steps of adding hydrogen peroxide to said suspension in an amount to enhance the settling of said solids, said amount being at least about 2 pounds per ton of suspended solids, and settling said solids from said suspension.
Claim 2
Dependent Claim
80 words
A process for settling waste slime solids, from a phosphate are processing operation, including suspended attapulgite, montmorillonite, and fine sand from an aqueous suspension thereof, wherein said suspension contains from about 0.01% to about 35% by weight of solids, which comprises the steps of adding hydrogen peroxide to said suspension in an amount to enhance the settling of said solids, said amount being at least about 2 pounds per ton of suspended solids, and settling said solids from said suspension.
Claim 3
Dependent Claim
22 words
A process in accordance with claim 1 wherein said suspension contains from about 0.2 to about 1.2% by weight of suspended bentonite.
Claim 4
Dependent Claim
29 words
A process in accordance with claim 1 wherein hydrogen peroxide is added in an amount ranging from about 2 pounds to about 40 pounds per ton of suspended solids.
Claim 5
Dependent Claim
22 words
A process in accordance with claim 3 wherein 30% to 70% aqueous solution of hydrogen peroxide is added to said waste slimes.
Claim 6
Dependent Claim
17 words
A process in accordance with claim 4 wherein said suspended solids are substantially all -150 mesh material.
References Cited (Backward Citations)
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Cited
US4017392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |