表面活性剂与同离子效应对己内酰胺吸附的影响

摘要

通过向硫酸铵与己内酰胺混合物中添加阳离子表面活性剂、两性离子表面活性剂和同离子物质,研究己内酰胺在硫酸铵晶体表面的吸附情况.实验结果表明:十二烷基三甲基氯化铵、十二烷基三甲基溴化铵、十六烷基三甲基氯化铵与氟阳离子表面活性剂能显著降低吸附量；硫酸钠、氯化铵、十二烷基甜菜碱和十六烷基三甲基溴化铵的加入,使己内酰胺在硫酸铵晶体表面的吸附量呈不规律的变化.在硫酸铵-母液-酰胺油体系中添加少量的十二烷基三甲基溴化铵可有效降低己内酰胺在硫酸铵颗粒表面的吸附量.%The adhesion of caprolactam on the surface of ammonium sulfate crystal was studied by adding various kinds of surfactant and common ion compounds into the mixed system of caprolactam and ammonium sulfate. Test results show that cationic surfactants (DTAB, DTAC, CTAC) and fluorine cationic surfactant can reduce the amount of caprolactam adhered on ammonium sulfate significantly; the addition of Na2SO4 , NH4Cl, CTAB and dodecyl betaine made the adsorption of caprolactam become irregular. In an industrial system containing caprolactam, ammonium sulfate and crystallization mother liquid, adding a little of DTAB into the system could effectively reduce the amount of caprolactam adhered on ammonium sulfate particles.