以腐植酸、甲醛、对氨基苯磺酸钠、尿素等为原料，依次经过磺甲基化、缩聚反应合成了两种具有不同侧链结构的腐植酸分散剂，磺甲基化腐植酸缩聚物(简称 HBF)和磺甲基化腐植酸脲醛缩聚物(简称 HBUF)。通过对比考察了两种分散剂对陕西彬长煤的水煤浆的成浆性能、浆体稳定性能以及两种分散剂在煤颗粒表面的吸附性能，结果表明，具有较长侧链的 HBUF分散剂具有较好的分散降粘效果，其用量为0．45％时，彬长煤的最高制浆浓度达68％，两种分散剂在煤颗粒表面均呈现单分子层吸附特征，其中 HBUF吸附量大，吸附平衡常数高。
Two kinds of humic acids dispersants of coal water slurry (polycondensate of sulfomethylated humic acid (HBF)and polycondensate of sulfomethylated humic acids-urea(HBUF))with different side chains were synthesized by sulfonated methylation and polycondensation reaction with humic acid,formaldehyde,amino benzene sulfonic acid sodium,urea.The performance of the slurry and the effection of dispersants on the stabili-ty and adsorption of coal water slurry have been investigated.The results show that the dispersion viscosity and stability of HBUF with long side chains was better than HBF,and the maximum concentration was 68% with the dispersant dosage was 0.45%.Two kinds of dispersing agents on the surface of coal show a single molecular layer adsorption characteristic.The adsorption capacity of HBUF is better than HBF.
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