Patent US4504092A successfully refreshed from Google Patents.
US4504092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of carnallitic ores
Assignee: MINES DE POTASSE D'ALSACE SA
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Filing: 1982-03-05
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Granted: 1985-03-12
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Expires: 2002-03-05
Abstract
Abstract In a treatment of carnallitic ores by treatment with a decomposition-brine containing amounts of MgCl 2 , KCl and NaCl suitable for precipitating artificial sylvinite in a solution of MgCl 2 saturated in KCl and NaCl, the improvement of adding to said decomposition-brine a collector, e.g., a fatty amine acetate, for the flotation of KCl and a source of gas, preferably a gas-liberating additive such as H 2 O 2 , so as to contact newly formed crystal nucleii of KCl selectively with said collector and to contact bubbles of said gas with said collector so as to form a froth enriched in KCl simultaneously with the decomposition of said carnallite, the process being particularly useful for treatment of underground carnallitic ore whereby the froth and brine are withdrawn at the surface, separated, and the brine, after make-up additions, is recycled to the ore formation.
Inventors
- 👤 Michel Bichara
- 👤 Jean-Pierre Koensgen
- 👤 Michel Bodu
- 👤 Michel Meriaux
- 👤 Jean-Pierre Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:16
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
121 words
In a process for the treatment of carnallitic ores comprising the steps of contacting and decomposing the ore with a decomposition-brine containing amounts of MgCl 2 , KCl and NaCl suitable for precipitating artificial sylvinite in a solution of MgCl 2 saturated in KCl and NaCl, the improvement which comprises adding to said decomposition-brine a collector for the flotation of KCl and a source of gas, said source of gas being a compound capable of liberating a gas in the brine, so as to contact newly formed crystal nucleii of KCl selectively with said collector and to contact bubbles of said gas with said collector so as to form a froth enriched in KCl simultaneously with the decomposition of said carnallite.
Claim 2
Dependent Claim
121 words
In a process for the treatment of carnallitic ores comprising the steps of contacting and decomposing the ore with a decomposition-brine containing amounts of MgCl 2 , KCl and NaCl suitable for precipitating artificial sylvinite in a solution of MgCl 2 saturated in KCl and NaCl, the improvement which comprises adding to said decomposition-brine a collector for the flotation of KCl and a source of gas, said source of gas being a compound capable of liberating a gas in the brine, so as to contact newly formed crystal nucleii of KCl selectively with said collector and to contact bubbles of said gas with said collector so as to form a froth enriched in KCl simultaneously with the decomposition of said carnallite.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the source of gas is hydrogen peroxide and the collector is a fatty acid amine or salt thereof.
Claim 4
Dependent Claim
23 words
A process according to claim 1, wherein the amount of collector ranges between 200 and 300 g per metric ton of extracted KCl.
Claim 5
Dependent Claim
23 words
A process according to claim 2, wherein the amount of collector ranges between 200 and 300 g per metric ton of extracted KCl.
Claim 6
Dependent Claim
24 words
A process according to claim 2, wherein the amount of hydrogen peroxide ranges between 10 and 100 kg per metric ton of extracted KCl.
Claim 7
Dependent Claim
24 words
A process according to claim 4, wherein the amount of hydrogen peroxide ranges between 10 and 100 kg per metric ton of extracted KCl.
Claim 8
Dependent Claim
51 words
A process according to claim 1, wherein the carnallitic ore is decomposed underground in situ, the decomposition-brine, the collector and the source of gas are injected into the ore layer, resultant froth is carried above ground by an ascending flow of brine, and then the froth is separated from the brine.
Claim 9
Dependent Claim
25 words
A process according to claim 7, wherein the source of gas is hydrogen peroxide and the collector is a fatty acid amine or salt thereof.
Claim 10
Dependent Claim
29 words
A process according to claim 8, wherein per metric ton of extracted KCl the amount of collector is 200-300 kg and the amount of hydrogen peroxide is 10-100 kg.
Claim 11
Dependent Claim
21 words
A process according to claim 7, further comprising recycling part of the brine separated from the froth into the ore layer.
Claim 12
Dependent Claim
25 words
A process according to claim 1, wherein said source of gas is an aqueous solution of about 3 to 90% H 2 O 2 .
Claim 13
Dependent Claim
20 words
A process according to claim 1, wherein said collector is a fatty amine acetate of 12 to 16 carbon atoms.
Claim 14
Dependent Claim
20 words
A process according to claim 11, wherein said collector is a fatty amine acetate of 12 to 16 carbon atoms.
Claim 15
Dependent Claim
34 words
A process according to claim 13, wherein said decomposition brine consists essentially of 40 g/l to 60 g/l KCl, 30 g/l to 60 g/l NaCl and 250 g/l to 300 g/l MgCl 2 .
Claim 16
Dependent Claim
25 words
A process according to claim 7, wherein said source of gas is an aqueous solution of about 3 to 90% H 2 O 2 .
Claim 17
Dependent Claim
20 words
A process according to claim 7, wherein said collector is a fatty amine acetate of 12 to 16 carbon atoms.
Claim 18
Dependent Claim
20 words
A process according to claim 16, wherein said collector is a fatty amine acetate of 12 to 16 carbon atoms.
Claim 19
Dependent Claim
34 words
A process according to claim 17, wherein said decomposition brine consists essentially of 40 g/l to 60 g/l KCl, 30 g/l to 60 g/l NaCl and 250 g/l to 300 g/l MgCl 2 .
References Cited (Backward Citations)
CA613526A
Cited
US2046312A
Cited
US2604988A
Cited
US2702121A
Cited
US2689649A
Cited
FR1191492A
Cited
GB842682A
Cited
US3009575A
Cited
US2968525A
Cited
DE1142802B
Cited
US3304249A
Cited
FR1462849A
Cited
US3355212A
Cited
US3442553A
Cited
US3644102A
Cited
US3596763A
Cited
US3817972A
Cited
US3994531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |