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US 4,375,358 AGranted
Fuel slurries of solid carbonaceous material in water
AssigneeConoco Inc.
InventorsCharles J. Swartz, William P. Scott
Life of this patent
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Abstract
Stable, pumpable slurry compositions of finely divided solid carbonaceous material in water are described. The composition includes a gelling agent to provide a supporting gel having a yield stress and a viscosity builder to reduce the bleeding of the supporting gel.
Claims7
A stable, pumpable slurry composition of finely divided solid carbonaceous material in water wherein said slurry comprises:
- (a) at least 40 percent by weight of finely divided solid carbonaceous material;
- (b) water in an amount sufficient to provide a pumpable slurry;
- (c) a sufficient amount of a wetting agent in said water to effect wetting of the surface of said carbonaceous material;
- (d) water-dispersible Xanthan gum in said water in an amount sufficient to provide a supporting gel having a yield stress sufficient to support said carbonaceous material in said slurry;
- and
- (e) a water-soluble viscosity builder selected from the group consisting of sodium carboxymethyl cellulose, hydroxypropylated cornstarch, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and methyl cellulose in said water in an amount sufficient to substantially reduce bleeding of the supporting gel, whereby said slurry is stabilized against sedimentation caused by bleeding of the supporting gel.
3 more elements
Dependencies are inferred from the claim text.