Patent EP0106787A2 successfully refreshed from Google Patents.
EP0106787A2
Expired / Lapsed
EP
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Promoters for froth flotation of coal
Assignee: Witco Corp
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Filing: 1983-10-13
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Granted: —
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Expires: 2003-10-13
Abstract
Abstract Disclosed is an improved process wherein coal particles are beneficiated by froth flotation under coal froth flotation conditions to separate the desired coal particles from remaining unwanted ash and like gangue material. The improvement of the present invention comprises conducting the froth flotation in the presence of an effective proportion of a promoter which is an aromatic or at least C, o aliphatic carboxylic acid or an aliphatic ester thereof which is devoid of nitrogen atoms; a nitrile promoter; the epoxidized, hydroxylated, oxidized, or alkoxylated derivative of said acid, ester, and nitrile promoters; a higher fatty alcohol promoter and its alkoxylated derivatives; and mixtures thereof.
Inventors
- 👤 Robert Otis Keys
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 21:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/001; B03D1/004; B03D1/0043; B03D1/006; B03D1/008; B03D1/01; B03D2201/00; B03D2201/007; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/08
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
117 words
In a froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed particles as an aqueous phase in the presence of a coal particle collector, the improvement characterized by the addition of an effective proportion of a promoter selected from the group consisting essentially of: (a) an aromatic or at least C10 aliphatic carboxylic acid, an aliphatic ester or salt thereof; (b) a nitrile; (e) the epoxidized, hydroxylated, oxidized, or alkoxylated derivative of promoter (a) or (b), said promoter (a) and its derivatives being devoid of nitrogen atoms; (d) a C 12- C 30 fatty alcohol or its alkoxylated derivative; and (e) mixtures thereof.
Claim 2
Dependent Claim
117 words
In a froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed particles as an aqueous phase in the presence of a coal particle collector, the improvement characterized by the addition of an effective proportion of a promoter selected from the group consisting essentially of: (a) an aromatic or at least C10 aliphatic carboxylic acid, an aliphatic ester or salt thereof; (b) a nitrile; (e) the epoxidized, hydroxylated, oxidized, or alkoxylated derivative of promoter (a) or (b), said promoter (a) and its derivatives being devoid of nitrogen atoms; (d) a C 12- C 30 fatty alcohol or its alkoxylated derivative; and (e) mixtures thereof.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein said promoter (a) and (b) range in chain length from C 10 -C 30 .
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein said fatty promoters (a) and (b) range in chain length from C 12 -C 22 .
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein said aliphatic ester or salt promoter (a) has a C 1- C 30 aliphatic ester group.
Claim 6
Dependent Claim
23 words
The process of claim 4 wherein said aliphatic ester promoter (a) is a C 10 -C 30 partial or full ester of glycerol.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the epoxidized derivative of promoter (a).
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the hydroxylated derivative of promoter (a).
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the oxidized derivative of promoter (a).
Claim 10
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the alkoxylated derivative of promoter (a).
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the epoxidized derivative of promoter (b).
Claim 12
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the oxidized derivative of promoter (b).
Claim 13
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the hydroxylated derivative of promoter (b).
Claim 14
Dependent Claim
15 words
The process of claim 1 wherein said promoter is the alkoxylated derivative of promoter (b).
Claim 15
Dependent Claim
40 words
1 4. The process of claim 1 wherein said promoter (e) is the C 12 -C 20 fatty alcohol or its alkoxylated derivative which has been synthesized by the reaction of propylene or a higher oxide with said fatty alcohol.
Claim 16
Dependent Claim
21 words
The process of claim 1 wherein said nitrile promoter (b) is a nitrile pitch, a dimer nitrile, or a polynitrile promoter.
Claim 17
Dependent Claim
12 words
The process of claim 1 wherein said collector is a fuel oil.
Claim 18
Dependent Claim
19 words
The process of claim 1 wherein said coal flotation conditions are characterized by the addition of a frothing alcohol.
Claim 19
Dependent Claim
27 words
The process of claim 1 wherein said promoter is used in a dosage ranging from about 0.005 to about 2 grams of promoter per kilogram of coal.
Claim 20
Dependent Claim
51 words
The process of claim 1 wherein said coal flotation conditions include the use of a fuel oil collector in a dosage of about 0.02 to about 2.5 grams per kilogram of coal, and a lower alkanol frother in a dosage of about 0.05 to about 0.5 grams per kilogram of coal.
Claim 21
Dependent Claim
26 words
The process of claim 1 wherein said coal particles are conditioned with said collector, with a frothing alcohol, and with said promoter prior to said float.
References Cited (Backward Citations)
No citation records indexed.
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