Development of New Surfactant for Liquid Surfactant Membrane

液体表面活性剂膜用新型表面活性剂的研制

基本信息

批准号：
01850207
负责人：
NAKASHIO Fumiyuki
金额：
$ 4.03万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

To develop and design a liquid surfactant membrane (LSM) process, it is important to elucidate the role of a surfactant on the behavior of LSM, that is, the membrane stability, the permeation rate of metals, and the demulsification rate of emulsions.In this study, a series of surfactants (nonionic, anionic, cationic, amphoteric) having two long alkyl chains were synthesized. The effect of new surfactants on the behavior of LSM was investigated, and the following results were obtained.1. Synthesized surfactants gave more stable emulsion at a lower concentration compared with commercial surfactants of Span 80 and Polyamine. Among them, a derivative of glutamic acid dioleyl ester formed the most stable LSM.2. Using the newly synthesized surfactants, metal extraction by LSM was carried out in a stirred tank. The extraction rate of copper by LSM was explained by means of the interfacial reaction model. The surfactant strongly affects the permeation rate of metal ions in the LSM process. New phosphoric and sulfonic acid surfactants accelerated the extraction rate of copper because of the electrostatic interaction. On the other hand, when another extractant (PC-88A) was used in the extraction of rare earth metals, the extraction rate and separation factor were enhanced by use of new cationic suractant.3. Demulsification of W/O emulsions was carried out by a continuous electrical coalescer. The demulsification rate was influenced by the properties of W/O emulsion, applied voltage, and mean residence time, and the experimental equation taking these contributions into account was presented.

要开发和设计液态表面活性剂膜（LSM）过程，重要的是要阐明表面活性剂对LSM行为的作用，即，膜的稳定性，金属的渗透速率和乳液的渗透速率。研究了新的表面活性剂对LSM行为的影响，并获得了以下结果。1。与SPAN 80和多胺的商业表面活性剂相比，合成的表面活性剂在较低的浓度下具有更稳定的乳液。其中，谷氨酸列油基酯的衍生物形成了最稳定的LSM.2。使用新合成的表面活性剂，在搅拌箱中进行LSM的金属提取。 LSM的铜提取速率通过界面反应模型解释了。表面活性剂在LSM过程中强烈影响金属离子的渗透率。由于静电相互作用，新的磷酸和磺酸表面活性剂加速了铜的提取速率。另一方面，当使用另一种提取剂（PC-88A）用于提取稀土金属时，通过使用新的阳离子表面效果剂增强了提取速率和分离因子3。连续的电煤炭对带有乳液的拆除进行了破坏。拆除率受乳液，施加电压和平均停留时间的特性的影响，并考虑了实验方程。