Coal-aqueous mixtures

Details Coal-aqueous mixtures Coal-aqueous mixtures

C - Chemistry, Metallurgy

10

L

44/10

C10L 1/32 (2006.01)

Patent

CA 1260708

ABSTRACT OF THE DISCLOSURE This invention provides an improvement in a high solids content coal-aqueous mixture comprising particulate coal as a dispersed solid material; water as a carrier medium; a polyalkyleneoxide nonionic surfactant having a hydrophobic portion and a hydrophilic portion, the hydrophilic portion comprising at least about 100 units of ethylene oxide, the poly- alkyleneoxide nonionic surfactant being present in the mixture in an amount to disperse the particulate coal in the water carrier. The improvement is wherein the mixture includes fuel oil in an amount effective to increase the stability of the mixture and a viscosity stabilizing amount of a viscosity stabilizer. The improvement provides coal-aqueous mixtures of increased stability, that is, they experience even less settling and have increased shear stability as well as being characterized with lower viscosity of both the unthickened and the finished slurry. The compositions also have improved combustibility.

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