腐植酸系分散剂合成条件及对水煤浆黏度的影响

Synthesis Conditions of Humic Acid Series Dispersant Affected to Viscosity of Coal Water Mixture

采用腐植酸为原料,丙烯酸为接枝共聚单体,过硫酸钾为引发剂,采用溶液聚合法制备腐植酸-丙烯酸接枝共聚物,并检测其对水煤浆黏度、流动性、稳定性的影响。通过正交实验,得出了腐植酸-丙烯酸接枝共聚物的合成优化条件:丙烯酸与腐植酸质量比为0.35∶1.00,引发剂用量5%,反应温度75℃,保温时间2 h,腐植酸-丙烯酸接枝共聚物对陕西彬长煤水煤浆具有良好的分散性能,当分散剂用量为0.12%时,水煤浆的表观黏度为956 mPa.s。

Taking humic acid as a raw material, acrylic acid as graft polymerization monomer and potassium persulfate as an initiator, the solution polymerization was applied to prepare humic acid-acrylic acid graft copolymer and to detect and measure the viscosity of the coal water mixture, fluidity and stability affected by the graft copolymer. With the orthogonal experiment, the synthesis optimized conditions of the humic acid-acrylic acid graft copolymer were obtained. The mass ratio of acrylic acid and humic acid was 0. 35 ： 1.00, the initiator dosage was 5%, the reaction temperature was 75 ℃, the reaction keeping time as 2 h and the humic acid-acrylic acid graft copolymer would have excellent dispersing performances to the coal water mixture with Binchang coal in shaanxi. When the dosage of the dispersant was 0. 12% , the apparent viscosity of the coal water mixture was 956 mPa · s.