萘油制备新型水煤浆添加剂的研究

研究了如何利用萘油中的有效成分合成出性能良好的水煤浆添加剂。通过合理的正交试验设计和多元线性回归分析方法得到了合成萘油添加剂的较佳工艺条件,即在75 g的萘油中,加入浓H2SO4 30 mL,在160 ℃时磺化2 h;加入HCHO 25 mL,在105 ℃时缩合1.5 h。利用实验合成的萘油添加剂与纯萘磺酸甲醛缩合物作添加剂分别对庞庄煤进行制浆实验。结果表明,萘油添加剂性能良好,可显著降低萘油添加剂的成本。应用傅立叶变换红外光谱对萘油添加剂的结构进行了分析,测出萘油添加剂主要为含有－CH2－,－SO3－等基团的芳香族化合物。对萘油添加剂改善水煤浆性能的作用机理进行了初步探讨。

Synthesis of a new additive from naphthalene oil for coal water slurry

The method using effective components of naphthalene oil to synthesize the additive for coal water slurry (CWS) was studied. Through proper experimental design and multianalysis of linear regress, the optimum synthesis conditions were obtained. That is, 30 mL H2SO4 was added into naphthalene oil (75 g) to initiate a sulfonation reaction at 160 ℃ for about 2 h. After hydrolysis, 25 mL HCHO was put into the reactor to cause a condensation reaction at 105 ℃ for 1.5 h. Experiments of CWS preparation with the additive synthesized and with the pure naphthalenesulfonic acid formaldehyde condensation product indicate that the additive synthesized has good dispersive property and low cost. The functional groups of the present additive are investigated by Fourier Transform Infrared Spectroscopy (FTIR), which indicates that the additive contains some aromatic compounds with －CH2－,－SO3－functional groups. Finally, the mechanism for improving the property of CWS by the additive is probed preliminarily.