Studies of Collectors. XI. The Preparation of Cyclic Polyamine-Type Surfactants and Application to Ion-Flotation Collectors
作者:Kimiho Yamada、Yoshifumi Koide、Hiroshi Yamanokuchi、Masaki Ohmura、Hideto Shosenji
DOI:10.1246/bcsj.62.2867
日期:1989.9
Inclusion-type surfactants bearing cyclic dioxopolyamine (RndoN4, RndoN5) or cyclic polyamine (R12N4, 2.4R-N6, Ls6.8N6) were prepared and then investigated as ion-flotation collectors. The surface tensions of the surfactant solutions were 30–40 dyn cm−1. The molecular areas of the surfactants in the aqueous solutions, as calculated from the Gibbs adsorption isotherm, were discussed in connection with the structures of the RndoN4 and its Cu2+ complex. Heavy metal ions were floated with RndoN4 or RndoN5. The highest floatabilities of Cu2+ and Ni2+ were in the pH range of 10–12, while that of Fe3+ was in the pH range of 6–10. Furthermore, similar characteristics of the metal floatabilities were obtained by using R12N4 and alkylated linear polyamine. The flotation using RndoN4 or RndoN5 was done by the complex formation, but that using R12N4 or 2.4R-N6 was done by the neutralization of the complex with OH−. The selectivities in pH 4–8 were Cu2+>Ni2+>Fe3+>Zn2+ when RndoN4 was used and Fe3+>Cu2+>Ni2+>Zn2+ when RndoN5 was used.
制备了含有环状二氧多胺(RndoN4、RndoN5)或环状多胺(R12N4、2.4R-N6、Ls6.8N6)的包合型表面活性剂,并将其作为离子浮选捕集剂进行了研究。表面活性剂溶液的表面张力为 30-40 dyn cm-1。根据吉布斯吸附等温线计算出的表面活性剂在水溶液中的分子面积与 RndoN4 及其 Cu2+ 复合物的结构进行了讨论。重金属离子被 RndoN4 或 RndoN5 浮起。Cu2+ 和 Ni2+ 在 pH 值为 10-12 时的浮游能力最强,而 Fe3+ 在 pH 值为 6-10 时的浮游能力最强。此外,使用 R12N4 和烷基化线性多胺也获得了类似的金属浮选特性。使用 RndoN4 或 RndoN5 是通过形成络合物来实现浮选的,而使用 R12N4 或 2.4R-N6 则是通过用 OH- 中和络合物来实现浮选的。在 pH 值为 4-8 的条件下,使用 RndoN4 时的选择性为 Cu2+>Ni2+>Fe3+>Zn2+ ,使用 RndoN5 时的选择性为 Fe3+>Cu2+>Ni2+>Zn2+ 。