磺化萘酚甲醛/萘系复合水煤浆分散剂的性能

摘要

A new coal water slurry(CWS)dispersant named sulfonated naphthol formaldehyde (NPF) was synthesized with 2-naphthol, concentrated sulfuric acid and formaldehyde. Firstly, properties of the polymer on different polymerization conditions were analyzed. Secondly, the stabilities of NSF was enhanced through the NPF/NSF were compounded. The results showed that when the monomer,formaldehyde, 2-naphtholmolar ratio was 0. 86 : 1, polymerization temperature was 130 ℃ , polymerization time was 2 h, the dispersion agent performance is optimal. The coal water slurry viscosity is 463 mPa ·s with this dispersant when the dosage is 0. 5%, the concentration is 64%, indicating that the dispersant has a high dispersion. Coal water slurry viscosity has reduced by 150 mPa ·s when the percentage composition of NPF in the NSF ascertain is 20%. The water precipition ratio reduced by 1. 07% without hard deposit after 7 d, indicating that the stabilities were enhanced obviously.%以2-萘酚、浓硫酸和甲醛为原料合成了磺化萘酚甲醛(NPF)水煤浆分散剂.首先探讨了分散剂的合成条件对其性能的影响并进行了性质分析；其次,通过NPF与萘系(NSF)分散剂进行复配改善了NSF的稳定性能.结果表明,当甲醛和2-萘酚的配比为0.86∶1,聚合温度为130℃,反应时间为2h时分散剂性能最好.用此分散剂,在分散剂用量为0.5％,煤浆浓度为64％时,水煤浆黏度为463 mPa·s,分散性能良好.萘系(NSF)水煤浆分散剂中NPF的掺杂量为20％时,水煤浆黏度降低了150 mPa·s,7d后析水率下降1.07％,无硬沉淀出现,稳定性提升明显.