New surfactants for metal extraction by liquid surfactant membranes

F. Nakashio, M. Goto, K. Kondo

Research output: Chapter in Book/Report/Conference proceedingChapter


New amphoteric surfactants which possess an acceleration effect and give a stable emulsion were prepared for metal extraction by liquid surfactant membranes (henceforth LSM). Copper extraction by LSM using the amphoteric surfactants was carried out in a stirred tank and the W/O emulsion was demulsified by a continuous electrical coalescer. The amphoteric surfactants formed a stable emulsion at low concentration which is about one-tenth the corresponding concentration of Span 80 or Polyamine. By using the amphoteric surfactants, the extraction rate was increased about ten times as compared with the nonionic and cationic surfactants. The acceleration effect is considered to be caused by an electrostatic interaction between copper ion and hydrophilic phosphoric-group of the amphoteric surfactants. The increase of the extraction rate leads to shortening the operation time in the LSM process. Furthermore, the emulsion made of the amphoteric surfactant could be efficiently demulsified by an electrical coalescer.

Original languageEnglish
Title of host publicationProcess Metallurgy
Number of pages10
Publication statusPublished - Jan 1 1992

Publication series

NameProcess Metallurgy
ISSN (Print)1572-4409

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'New surfactants for metal extraction by liquid surfactant membranes'. Together they form a unique fingerprint.

  • Cite this

    Nakashio, F., Goto, M., & Kondo, K. (1992). New surfactants for metal extraction by liquid surfactant membranes. In Process Metallurgy (pp. 1459-1468). (Process Metallurgy; Vol. 7).