Patent US3768646A successfully refreshed from Google Patents.
US3768646A
Expired / Lapsed
US
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Flotation of siliceous materials with diamine reaction products
Assignee: Occidental Petroleum Corp
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Filing: 1971-09-16
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Granted: 1973-10-30
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Expires: 1991-09-16
Abstract
Abstract A process for the flotation separation of ore valves from siliceous materials by reagents obtained by the reaction of N,Ndialkyl alkylene diamines and N,N-dialkyl-N''-alkyl alkylene diamines with saturated, unsaturated and hydroxylated fatty acids.
Inventors
- 👤 E Grannen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:19
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A process as claimed in claim 1 in which the fatty acid in the reaction product is present in the amount of from about 1.0 to about 1.5 mols per mol or primary and secondary amine groups present in the reactive amine system.
Claim 2
Dependent Claim
40 words
In a process for the flotation of siliceous materials from mineral values, the use as the flotation reagent for the siliceous materials, the salt obtained by reacting the condensation product obtained by reacting at least one diamine having the structure:
References Cited (Backward Citations)
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US2569417A
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US2805135A
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US2927692A
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |