A solid polycarboxylic acid type coal water slurry dispersant, its preparation method and application

Abstract

The application belongs to the technical field of coal water slurry additives, and discloses a solid polycarboxylic acid coal water slurry dispersant and a preparation method and application thereof. The method is to melt copolymerize polyether macromonomer, acrylic acid, ester monomer M-TB and 3-sulfopropyl acrylate under the action of an initiator, and obtain the dispersant after neutralization. The solid polycarboxylic acid coal water slurry dispersant is prepared by using a solvent-free bulk polymerization process, the synthesis method is simple, there is no solvent emission, the environmental protection pressure is small, and the product has better transportation convenience. By introducing the ester monomer M-TB containing a butoxy ester side chain and the sulfonic acid monomer containing a strong anion sulfonic acid group, the adsorption capacity and electrostatic repulsion of the dispersant on the surface of coal particles are significantly enhanced, the obtained product has excellent dispersion viscosity reduction effect and stability, the molecular structure is flexible and adjustable, the product can meet the needs of different coal types and slurry preparation processes, and is suitable for industrial production.

Images