US4582596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frothers demonstrating enhanced recovery of coarse particles in froth floatation
Assignee: Dow Chemical Co
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Filing: 1984-06-04
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Granted: 1986-04-15
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Expires: 2004-06-04
Abstract
Abstract The invention is a process for recovering coal or mineral values from raw coal or mineral ore which comprises subjecting the raw coal or mineral ore in the form of an aqueous pulp, to a floatation process in the presence of a floatation collector, and a flotating amount of a floatation frother which comprises the reaction product of an alitphatic C 6 alcohol and between about 1 and 5 moles of propylene oxide, butylene oxide or mixtures thereof, under conditions such that the coal or mineral values are recovered.
Inventors
- 👤 Robert D. Hansen
- 👤 Roger W. Bergman
- 👤 Richard R. Klimpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:32
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D1/0043; B03D2201/00; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
95 words
A process for recovering coal or metal values from raw coal or metal ore which comprises subjecting the raw coal or metal ore in the form of an aqueous pulp, to a flotation process in the presence of a flotation collector for coal or metal values and a flotating amount of a flotation frother which comprises the reaction product of a monohydroxy aliphatic C 6 alcohol and between about 1 and 5 moles of propylene oxide, butylene oxide or mixtures thereof, under conditions such that the coal or metal values are recovered in the froth.
Claim 2
Dependent Claim
95 words
A process for recovering coal or metal values from raw coal or metal ore which comprises subjecting the raw coal or metal ore in the form of an aqueous pulp, to a flotation process in the presence of a flotation collector for coal or metal values and a flotating amount of a flotation frother which comprises the reaction product of a monohydroxy aliphatic C 6 alcohol and between about 1 and 5 moles of propylene oxide, butylene oxide or mixtures thereof, under conditions such that the coal or metal values are recovered in the froth.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein coal, metal oxide or metal sulfide values are recovered.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein coal, copper sulfide, nickel sulfide, lead sulfide, zinc sulfide or molybdenum sulfide values are recovered.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein coal or metal sulfide values are recovered.
Claim 6
Dependent Claim
83 words
The process of claim 4 wherein the frother corresponds to the formula ##STR2## wherein R 1 is a straight- or branched-chain C 6 alkyl radical; R 2 is separately in each occurrence hydrogen, methyl or ethyl; and n is an integer of 1 to 5, inclusive; with the proviso that one R 2 in each unit must be methyl or ethyl, and with the further proviso that when one R 2 in a unit is ethyl, the other R 2 must be hydrogen.
Claim 7
Dependent Claim
15 words
The process of claim 5 wherein n is an integer of 1 to 3, inclusive.
Claim 8
Dependent Claim
11 words
The process of claim 6 wherein n is the integer 2.
Claim 9
Dependent Claim
20 words
The process of claim 5 wherein the frother is a reaction product of a C 6 alcohol and propylene oxide.
Claim 10
Dependent Claim
15 words
The process of claim 8 wherein the C 6 alcohol is hexanol or methylisobutyl carbinol.
Claim 11
Dependent Claim
11 words
The process of claim 9 wherein n is the integer 2.
Claim 12
Dependent Claim
18 words
The process of claim 9 wherein a flotating amount of frother is between about 0.005 and 0.5 lb/ton.
Claim 13
Dependent Claim
18 words
The process of claim 11 wherein a flotating amount of frother is between about 0.01 and 0.2 lb/ton.
Claim 14
Dependent Claim
10 words
The process of claim 5 wherein coal values are recovered.
Claim 15
Dependent Claim
15 words
The process of claim 13 wherein the C 6 alcohol is hexanol or methylisobutyl carbinol.
Claim 16
Dependent Claim
9 words
The process of claim 14 wherein n is 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |