松香基水煤浆分散剂的合成、应用及其吸附性能

Synthesis,application and adsorption property of a dispersing agent based on rosin for coal water mixture

以松香、马来酸酐和牛磺酸为原料合成了一种阴离子型松香基水煤浆分散剂马来海松酸牛磺酸酰胺(MTA).以商用分散剂萘磺酸盐甲醛缩合物(NSF)为对照分散剂,考察了MTA对于神府煤水煤浆的应用性能,结果表明,MTA的减黏和稳定能力均优于NSF.考察了MTA和NSF在煤表面的物化性质,结果表明,两种分散剂在煤表面的吸附行为均服从Langmuir模型,MTA表现出较高的吸附量以及较强的润湿和荷电能力.这说明合成分散剂较优的应用性能与其在煤表面直立的吸附模式有关.

A rosin derivant dispersant, maleopimaric acid taurine amide （MTA ） was prepared with rosin,maleic anhydride and taurine as raw materials,and employed as the dispersing a-gent of the coal water mixture （CWM ） fabricated from Shenfu coal. The C W M property examination shows that the MTA has better capacity in diminishing CWM viscosity and making the slurry steady than the naphthalene sulfonate formaldehydepersant （NSF,a commercial dispersant）. The physicochemical performance detection of the two dispersants reveals that the adsorption behaviors of the both dispersants on coal surfaceobey the Langmuir mode . The adsorption quantity of the MTA at coal-water interface is higher than that of NSF,and the synthetic dispersant has stronger wetting and charging ca-pability of coal surface than NSF . It suggests that the superior application performances of MTA could be related to its adsorption mode of standing upright on coal.