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US4122004A
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Froth flotation process
Assignee: Dow Chemical Co
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Filing: 1977-11-07
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Granted: 1978-10-24
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Expires: 1997-11-07
Abstract
Abstract A process for the recovery of mineral values by froth flotation in an aqueous medium from mineral ores with the use of an effective amount of a sulfide-containing polyalkylene oxide frother.
Inventors
- 👤 Guy H. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:15
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/04; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
In a process for collecting mineral values from an ore which comprises mixing ground ore with water to form an ore pulp and aerating said pulp in the presence of an effective amount of a frother, the improvement which comprises carrying out said process with a frother of the formula: H(BO).sub.z (PO).sub.y (EO).sub.x S(EO).sub.x' (PO).sub.y' (BO).sub.z' H wherein, in said formula, EO = C 2 H 4 O, PO = C 3 H 6 O and BO = C 4 H 8 O, x and x' are each 0-2, y and y' each are 0-7 and z and z' each are 0-2, x+x'+y+y'+z+z' being an average of from 4 to about 14, with the proviso that at least one of x, y or z and at least one of x', y' or z' is always at least 1 and with the further proviso that when y and y' are each 0, of z or z' is always at least 1.
Claim 2
Dependent Claim
160 words
In a process for collecting mineral values from an ore which comprises mixing ground ore with water to form an ore pulp and aerating said pulp in the presence of an effective amount of a frother, the improvement which comprises carrying out said process with a frother of the formula: H(BO).sub.z (PO).sub.y (EO).sub.x S(EO).sub.x' (PO).sub.y' (BO).sub.z' H wherein, in said formula, EO = C 2 H 4 O, PO = C 3 H 6 O and BO = C 4 H 8 O, x and x' are each 0-2, y and y' each are 0-7 and z and z' each are 0-2, x+x'+y+y'+z+z' being an average of from 4 to about 14, with the proviso that at least one of x, y or z and at least one of x', y' or z' is always at least 1 and with the further proviso that when y and y' are each 0, of z or z' is always at least 1.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the frother is employed with a mineral collector.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein z and z' are 0.
Claim 5
Dependent Claim
17 words
The process of claim 3 wherein the average sum of x+x'+y+y' is from 4 to about 10.
Claim 6
Dependent Claim
29 words
The process of claim 3 wherein x+x' is an average sum of from 1 to about 4 and y+y' is an average sum of from 1 to about 8.
Claim 7
Dependent Claim
23 words
The process of claim 3 wherein x and x' are 0 and y+y' represents an average sum of from 4 to about 14.
Claim 8
Dependent Claim
17 words
The process of claim 6 wherein the average sum of y+y' is from 4 to about 10.
Claim 9
Dependent Claim
16 words
The process of claim 6 wherein y+y' represents an average sum from 4 to about 8.
Claim 10
Dependent Claim
13 words
The process of claim 6 wherein y+y' represents an average sum of 7.
Claim 11
Dependent Claim
13 words
The process of claim 6 wherein y+y' represents an average sum of 5.
Claim 12
Dependent Claim
21 words
The process of claim 3 wherein x+x' represents an average sum of 2 and y+y' represents an average sum of 4.
References Cited (Backward Citations)
US1570262A
Cited
US2352435A
Cited
US2522589A
Cited
US2484369A
Cited
US2536684A
Cited
US2657238A
Cited
US3081354A
Cited
US3555390A
Cited
US3590996A
Cited
US3855751A
Cited
GB1355091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |