Coal-aqueous mixtures
AssigneeGulf & Western Manufacturing Company
InventorSeymour Mark
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Abstract
Coal-aqueous mixture characterized by having high coal solids concentrations are provided. Selected polyalkyleneoxide nonionic surfactants are employed at low concentrations to disperse coal in an aqueous carrier medium to coal solids levels of 70% by weight, or higher. The selected polyalkyleneoxide nonionic surfactants are characterized by having a high molecular weight and a hydrophilic portion comprised of at least about 100 repeating units of ethylene oxide.
Claims57
A coal-aqueous mixture consisting essentially of:
- particulate coal as a dispersed solid material;
- water as a carrier medium;
- and a polyalkyleneoxide nonionic surfactant having a hydrophobic portion and a hydrophilic portion, said hydrophilic portion comprising at least about 100 units of ethylene oxide, said polyalkyleneoxide nonionic surfactant being present in said mixture in an amount sufficient to disperse said particulate coal in said water carrier.
A method for forming a coal-aqueous mixture comprising:
- admixing particulate coal with ingredients consisting essentially of water and a polyalkyleneoxide nonionic surfactant having a hydrophobic portion and a hydrophilic portion, said hydrophilic portion being comprised of at least about 100 units of ethylene oxide.
A coal-aqueous mixture consisting essentially of:
- particulate coal as a dispersed solid material;
- water as a carrier medium;
- and a polyalkyleneoxide nonionic surfactant selected from the group consisting of a composition of the formula ##STR12## wherein R is substituted or unsubstituted alkyl of from 1 to 18 carbon atoms;
- substituted or unsubstituted aryl or an amino group, and n is an integer of at least about 100, a composition of the formula ##STR13## wherein R.sub.1 is an alkylene radical having 2 to 5 carbon atoms;
- R.sub.2 is an alkylene radical having 3 to 5 carbon atoms;
- a, b, c, d, e, f, g and h are whole integers and e, f, g and h total at least about 100 and a compound of the formula
- HO(CH.sub.2 CH.sub.2 O).sub.a [CH(CH.sub.3)CH.sub.2 O].sub.b (CH.sub.2 CH.sub.2 O).sub.c H
- wherein a, b and c are whole integers totaling at least about 100.
Dependencies are inferred from the claim text.