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Investigation of grafted sulfonated alkali lignin polymer as dispersant in coal-water slurry
Yanlin Qin,Dongjie Yang,Wenyuan Guo,Xueqing Qiu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-
A novel grafted sulfonated alkali lignin polymers (GSAL) with hydrophilic side chain and differentmolecular weights prepared were used as dispersants for coal-water slurry (CWS). The viscosityreduction for CWS had been attributed primarily to the diminution of coal particles (adsorbed GSAL)interaction of steric electrostatic repulsion and dramatic wettability. The adsorption amount of GSAL-3can reach to 1.58 mg/g, and the isotherm of GSAL on coal surface belongs to the Langmuir model, theelectrostatic self-assembly result indicated the dominant driving force of GSAL absorbed on coal surfacewas the p–p interaction. GSAL was superior in reducing the viscosities of CWS.