Transport of aqueous coal slurries
AssigneeUnion Carbide Corporation
InventorsDavid B. Braun, Stephen Drap, Henry E. Fritz, Arthur K. Ingberman
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Abstract
Compositions containing small amounts of named water soluble polymers in an aqueous coal slurry permit the extrusion, pumping and transport of higher solids content aqueous coal slurries.
Claims13
In an aqueous coal slurry composition comprising water and coal, the improvement of having present therein up to about 10 weight percent based on the total weight of the composition of a water-soluble polymer from the group consisting of hydroxyethyl cellulose, the quaternary nitrogen-substituted cellulose ethers, xanthan gum, hydroxypropyl guar gum and carboxymethyl hydroxypropyl guar gum.
In a method for transporting or pumping an aqueous coal slurry, the improvement of having present in the aqueous coal slurry a water-soluble polymer from the group consisting of hydroxyethyl cellulose, the quaternary nitrogen-substituted cellulose ethers, xanthan gum, hydroxypropyl guar gum and carboxymethyl hydroxypropyl guar gum in a concentration of up to 10 weight percent based on the total weight of the composition.
In an aqueous coal slurry composition consisting essentially of water and coal, the improvement of having present therein up to about 10 weight percent based on the total weight of the water and coal composition of a water-soluble poly(ethylene oxide) polymer.
In a method for transporting or pumping an aqueous coal slurry, the improvement of having present in the aqueous coal slurry a water-soluble poly(ethylene oxide) polymer in a concentration of up to 10 weight percent based on the total weight of the composition;
- said water-soluble polymer reducing the dewatering of the aqueous coal slurry composition.
Dependencies are inferred from the claim text.