Dispersant for high solids coal-water slurries

Details Dispersant for high solids coal-water slurries Dispersant for high solids coal-water slurries

C - Chemistry, Metallurgy

10

L

44/10

C10L 1/32 (2006.01)

Patent

CA 1207147

ABSTRACT OF THE DISCLOSURE An improved coal-water slurry containing finely divided coal particles and a dispersing agent which is comprised of a water-soluble homopolymer of a monomer represented by the formula: Image wherein: M is hydrogen, lithium, sodium, potassium, magnesium, or calcium; R is allyl or methallyl; R1 is hydrogen, allyl or methallyl; R2 is hydrogen or sulfonate; R3 is hydrogen or sulfonate; and providing that R2 is not the same as R3. These improved coal-water slurries are best formulated at a pH of at least 6 and, preferably, above 8. The dispersants have a molecular weight between 1000-20,000.

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