US4133750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate flotation process
Assignee: Mobil Oil AS
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Filing: 1976-12-06
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Granted: 1979-01-09
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Expires: 1996-12-06
Abstract
Abstract A process for removing phosphate ore from siliceous materials using a material comprising a combination of a sulfonated hydrocarbon and a kerosene.
Inventors
- 👤 George T. Burress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:28
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/006; B03D1/01; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
An improved process for the beneficiation of phosphate ores in which there are at least a fatty acid flotation and an amine flotation, the improvement whereby the amount of reagent in the fatty acid flotation step is significantly reduced while recovering substantially the same quantity of bone phosphate of lime, said improvement being achieved by adding to the ore prior to said fatty acid flotation step from about 0.3 to about 0.7 pound per ton of ore of a fatty acid and from about 0.9 to about 2.1 pounds per ton of ore of a petroleum fraction and a combination comprising from about 0.005 to about 0.08 pound per ton of ore of a sulfonated aromatic hydrocarbon having a molecular weight of from about 350 to about 500 and from about 0.03 to about 0.10 pound per ton of ore of kerosene.
Claim 2
Dependent Claim
142 words
An improved process for the beneficiation of phosphate ores in which there are at least a fatty acid flotation and an amine flotation, the improvement whereby the amount of reagent in the fatty acid flotation step is significantly reduced while recovering substantially the same quantity of bone phosphate of lime, said improvement being achieved by adding to the ore prior to said fatty acid flotation step from about 0.3 to about 0.7 pound per ton of ore of a fatty acid and from about 0.9 to about 2.1 pounds per ton of ore of a petroleum fraction and a combination comprising from about 0.005 to about 0.08 pound per ton of ore of a sulfonated aromatic hydrocarbon having a molecular weight of from about 350 to about 500 and from about 0.03 to about 0.10 pound per ton of ore of kerosene.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the molecular weight is from about 400 to about 450.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the acid used is as defined in Example 1 of the specification.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the sulfonated hydrocarbon is as defined in Example 1 of the specification.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein the petroleum fraction is present to the extent of about three times the amount of said acid.
References Cited (Backward Citations)
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US3859207A
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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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |