DISPERSANT FOR AQUEOUS SLURRY OF CARBONACEOUS SOLID

摘要

This invention discloses a dispersant for an aqueous carbonaceous solid slurry, which comprises a watersoluble copolymer having an average molecular weight of 1,000 to 500,000 and obtained by polymerizing (A) 0.1 to 7 mol% of a polyalkylene glycol mono(meth)acrylate type monomer, (B) 5 to 94.9 mol% of a sulfoalkyl (meth)acrylate type monomer, (C) 5 to 94.9 mol% of an unsaturated carboxylic acid type monomer, and (D) 0 to 20 mol% of other monomer (providing that the total amount of the monomers is 100 mol%) and/or a salt of the water-soluble copolymer.