EP0057576A2
Expired / Lapsed
EP
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Aqueous coal dispersions
Assignee: Standard Oil Co
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Filing: 1982-01-28
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Granted: —
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Expires: 2002-01-28
Abstract
Abstract Polyalkyleneoxide nonionic surfactants having a high molecular weight and a hydrophilic portion comprised of at least about 100 repeating units of ethylene oxide ale used in the preparation of aqueous coal dispersions of high solids content.
Inventors
- 👤 Mark Seymour
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 01:21
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/326; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
26 words
A dispersion of coal in water containing as a dispersant a polyalkylene oxide nonionic surfactant comprising in the hydrophilic portion at least 100 ethylene oxide units.
Claim 2
Dependent Claim
26 words
A dispersion of coal in water containing as a dispersant a polyalkylene oxide nonionic surfactant comprising in the hydrophilic portion at least 100 ethylene oxide units.
Claim 3
Dependent Claim
28 words
A dispersion according to claim 1, containing, on a weight basis: 45 to 80% coal, 19.9 to 50% water, and 0.1 to 3% of said polyalkylene oxide surfactant.
Claim 4
Dependent Claim
19 words
A dispersion according to claim 1 or 2, wherein said surfactant has a molecular weight of at least 4000.
Claim 5
Dependent Claim
101 words
A dispersion according to claim 1, 2 or 3, wherein said surfactant is of the formula: or wherein R is substituted or unsubstituted alkyl of 1-18 carbon atoms, substituted or unsubstituted aryl or amino; R 1 is alkylene of 2-5 carbon atoms; R 2 is alkylene of 3-5 carbon atoms; and a - h and n are integers with the provisos that in formula I n is at least 100, in formula II the total of a + c is at least 100 and in formula III the total of e + f + g + h is at least 100.
Claim 6
Dependent Claim
16 words
A dispersion according to any one of claims 1-3, wherein the coal is a beneficiated coal.
Claim 7
Dependent Claim
25 words
A dispersion according to claim 5, wherein the coal has an ash level of 0.5 to 6.0% and a sulfur level of 0.5 to 2.0%.
Claim 8
Dependent Claim
56 words
A dispersion according to claim 5 or 6, wherein the coal is a hydrophobic, oleophilic coal product obtained by treating ground coal in an aqueous medium with a chemical treating agent comprising a monomeric organic compound, a free radical polymerisation initiator, a free radical polymerisation catalyst and an organic liquid diluent, and recovering the treated particles.
Claim 9
Dependent Claim
26 words
A dispersion accordig to claim 7, wherein the monomeric compound used in said treatment is tall oil, and the organic liquid diluent is a fuel oil.
Claim 10
Dependent Claim
19 words
A dispersion according to any one of the preceding claims, which contains at least 70% by weight of coal.
Claim 11
Independent Claim
39 words
A method of dispersing coal in water which comprises dispersing particles of coal in water in the presence of polyoxyalkylene nonionic surfactant containing in the hydrophilic portion of the molecule a total of at least 100 ethylene oxide units.
Claim 12
Independent Claim
39 words
A method of dispersing coal in water which comprises dispersing particles of coal in water in the presence of polyoxyalkylene nonionic surfactant containing in the hydrophilic portion of the molecule a total of at least 100 ethylene oxide units.
References Cited (Backward Citations)
No citation records indexed.
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