Diamond Shamrock Corporation

Diamond Shamrock Chemicals Company

Kathy A Knitter

Jose L Villa

Martin J Schick

John G Papalos

Arpad Savoly

Jose' L Villa

Improved stabilized water slurries of carbonaceous materials are obtained by having present a condensation product or a salt thereof of a substituted phenol sulfonic acid which is

Stabilized water slurries of carbonaceous materials

Aqueous carbonaceous slurries having reduced viscosity, a stabilized network of carbonaceous material in water and improved pumpability are obtained by having present a salt of naphthalenesulfonic acid formaldehyde condensate and at least one water soluble polymer selected from the group consisting of sodium alginate, guar gum, locust bean gum, carboxymethylhydroxypropyl guar gum, hydroxypropyl guar gum and guarpak guar gum. For example, a mixture of 96.8% by weight of ammonium naphthalenesulfonic acid formaldehyde condensate and 3.2% by weight of sodium alginate can be added to an aqueous coal slurry in an amount of 0.31% by weight of the slurry.

Aqueous slurries of carbonaceous materials

Aqueous carbonaceous slurries having reduced viscosity, a stabilized network of coal in water and improved pumpability are obtained by having present a salt of naphthalenesulfonic acid formaldehyde condensate and at least one water soluble polymer selected from the group consisting of gum karaya, mixtures of gum karaya and polyacrylamide and polysaccaride modified with polyacrylate. For example, a mixture of 61.5% by weight of ammonium naphthalenesulfonic acid formaldehyde condensate and 38.5% by weight of gum karaya can be added to an aqueous coal slurry in an amount of 0.13% by weight of the slurry.

Aqueous carbonaceous slurries

Carbonaceous materials in oil slurries

Mixtures of an alkoxylated quaternary salt and a nitrogen base having from zero to nine carbon atoms are added to carbonaceous materials in oil slurries such as a coal oil mixture (COM) or a coke oil mixture in an amount sufficient to stabilize the slurries during storage and dispersing at various temperatures. Useful stabilizer mixtures include a mixture of from about 99% to about 75% by weight of an alkoxylated quaternary salt which is a reaction product of a cocoamine ethoxylate and diethyl sulfate and from about 1% to about 25% by weight of a nitrogen base such as urea. The stabilizer mixtures may be added to either the oil or slurry (or during grinding of the carbonaceous material) and are effective with or without addition of water. Coal/coke oil slurries may contain from about 40 to about 90 parts by weight of oil, about 10 to about 60 parts by weight of powdered coal or coke, about 0.01 to about 6.0 parts by weight of the stabilizer mixture and about 0 to about 10 parts by weight of water.

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Morristown, NJ, United States of America

Kathy A Knitter