US4168227A
Expired / Lapsed
US
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Flotation method for oxidized ores
Assignee: Carbonisation et Charbons Actifs CECA SA
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Filing: 1977-10-14
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Granted: 1979-09-18
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Expires: 1997-10-14
Abstract
Abstract In a method for enriching oxidized ores by froth flotation, use is made, as collector, of a combination comprising : at least a first compound selected among amino-l-alkane products having the general formula R 1 - (NH CH 2 CH 2 CH 2 )n NH 2 , wherein R 1 is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 8 to 18 carbon atoms, and n is an integer ranging from 0 to 3, and at least a second compound selected among amino-ether products having one amino function and at least one ether function, of the general formula R 2 - O - (CH 2 CH 2 O)n - CH 2 CH 2 CH 2 NH 2 , wherein R 2 is a saturated or unsaturated straight- or branched- chain hydrocarbon group containing from 2 to 18 carbon atoms, and n is an integer ranging from 0 to 2.
Inventors
- 👤 Jean-Louis Polgaire
- 👤 Pierre Pivette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:41
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/0043; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
105 words
A method for enriching oxidized ores by froth flotation, wherein use is made, as collector, of a combination comprising (1) an amino-1-alkane of the formula R.sub.1 --(NH CH.sub.2 CH.sub.2 CH.sub.2)n NH.sub.2 wherein R 1 is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 8 to 18 carbon atoms, and n is an integer ranging from 0 to 3, and (2) a monoether-monoamine of the formula R--O--CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2 wherein R is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 2 to 18 carbon atoms, wherein the ratio of the amino-1-alkane to the monoether-monoamine ranges from 4:1 to 3:2.
Claim 2
Independent Claim
105 words
A method for enriching oxidized ores by froth flotation, wherein use is made, as collector, of a combination comprising (1) an amino-1-alkane of the formula R.sub.1 --(NH CH.sub.2 CH.sub.2 CH.sub.2)n NH.sub.2 wherein R 1 is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 8 to 18 carbon atoms, and n is an integer ranging from 0 to 3, and (2) a monoether-monoamine of the formula R--O--CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2 wherein R is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 2 to 18 carbon atoms, wherein the ratio of the amino-1-alkane to the monoether-monoamine ranges from 4:1 to 3:2.
Claim 3
Dependent Claim
40 words
A method as set forth in claim 1, wherein the alkylamine-etheramine combination is used in the form of water-soluble or -dispersible salts, the salt conversion step being carried out partially or completely by means of a mineral or organic acid.
Claim 4
Dependent Claim
31 words
A method as set forth in claim 1, wherein the amino-l-alkane product is a monoamine of the formula R 1 --NH 2 , R 1 being defined as in claim 1.
Claim 5
Dependent Claim
32 words
A method as set forth in claim 1, wherein the amino-l-alkane product is a diamine of the formula R.sub.1 --NH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2 R 1 being defined as in claim 1.
Claim 6
Dependent Claim
20 words
A method as set forth in claim 1, wherein the acid used for the salt conversion step is acetic acid.
Claim 7
Dependent Claim
19 words
Method as set forth in claim 1, wherein the acid use for the salt conversion step is hydrochloric acid.
Claim 8
Dependent Claim
18 words
Method as set forth in claim 1, wherein the ratio between the amino-l-alkane and the monoether-monoamine is 7:3.
Claim 9
Dependent Claim
17 words
Method as set forth in claim 1, wherein the ore is in a very finely divided state.
Claim 10
Dependent Claim
15 words
Method as set forth in claim 1, wherein the oxidized ore is an iron ore.
Claim 11
Dependent Claim
18 words
Method as set forth in claim 9, wherein the iron ore is not subjected to a desliming process.
Claim 12
Independent Claim
95 words
A method for enriching oxidized ores by froth flotation, wherein use is made, as collector, of a combination comprising (1) an amino-l-alkane of the formula R.sub.1 --(NH CH.sub.2 CH.sub.2 CH.sub.2)n NH.sub.2 wherein R 1 is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 8 to 18 carbon atoms, and n is an integer ranging from 0 to 3, and (2) an amino-ether of the formula R--O CH.sub.2 CH.sub.2 O CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2 wherein R is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 2 to 18 carbon atoms.
Claim 13
Independent Claim
95 words
A method for enriching oxidized ores by froth flotation, wherein use is made, as collector, of a combination comprising (1) an amino-l-alkane of the formula R.sub.1 --(NH CH.sub.2 CH.sub.2 CH.sub.2)n NH.sub.2 wherein R 1 is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 8 to 18 carbon atoms, and n is an integer ranging from 0 to 3, and (2) an amino-ether of the formula R--O CH.sub.2 CH.sub.2 O CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2 wherein R is a saturated or unsaturated straight- or branched-chain hydrocarbon group containing from 2 to 18 carbon atoms.
Claim 14
Dependent Claim
20 words
A method as set forth in claim 11, wherein the ratio between the amino-l-alkane and the amino-ether is about 3:2.
References Cited (Backward Citations)
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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) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |