乳状液膜用表面活性剂的合成及其在液膜体系中的稳定性研究

Synthesis of polymer surfactant for emulsion liquid membrane and research on its stability

针对磷矿湿法浸取中的分离对象金属镁离子的分离和富集,以丙酰硫酸酯为磺化试剂,合成了磺化聚丁二烯阴离子表面活性剂SBT,并研究了温度、时间以及配比等因素对磺化度的影响。在磺化时间30 min,磺化温度130℃,丙酰酐与浓硫酸物质的量比1:1.71的条件下,其磺化度最大为6.82%。在液膜稳定性比较中,表面活性剂SBT明显优于表面活性剂SPAN80和SPAN83。

In order to separate and enrich magnesium ion in wet-process phosphoric acid, sulfonated polybutadiene anionic surfactant SBT is synthesized with propionylsulfate fatty as sulfonating agent. A series of condition are investigated involving effects of temperature, reaction time and component ratio on the degree of sulfonation. The degree of sulfonation reaches to 6. 82% while the process is controlled under the reaction time 30 minutes, temperature 130℃, molar ratio of propionyl anhydride to oil of vitriol 1：1.71. According to the comparison of liquid membrane stability, the sulfonated polybutadiene surfactant SBT is prior to surfactant SPAN80 and SPAN83.