Liquid—liquid extraction of alkali metal ions with non-ionic surfactant having a poly(oxyethylene) chain

✍ Scribed by Yoichi Kikuchi; Noboru Takahashi; Toshio Suzuki; Kiyoshi Sawada

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 636 KB
• Volume: 256
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)85360-i

✦ Synopsis

Ah&act

The Ion-pau extractlon of poly(oxyethylene) alkylphenyl ether (Tnton X-100) complexes of alkah metal Ions (Mf) wrth plcrate *on (PK-) mto 1,Zdlchloroethane (1,ZDCE) was studied The results of vapour pressure osmometry suggest a partlal dlssoclatlon of the Ion pair m 1,2-DCE Quantitative analysis of the extraction data revealed the extractlon of the Ion pair of Tnton X-10%alkah metal Ion urlth plcrate ion and dissoaatlon of the IOII pau The thermodynamic constants of the extractlon and the dlssoclation of the Ion pairs were evaluated by takmg mto conslderatlon the actlvlty coefficients of Ionic species m the aqueous and 1,2-DCE phases The extractlon constants of large metal Ions, rubldlum and caesmm, are almost the same as that of potassium Ion, whereas those of sodium and hthmm tons decrease with decrease m the Ion sne The effect of the sue of the alkab metal ions on the Trlton X-100 extractlon system IS less Important than that on the 18-crown-6 extractlon system The dlssoclatlon constants of the Ion pans were almost the same lrrespectlve of the land of alkah metal Ion, and the mterlomc distance of the Ion pair between the catlomc complex and plcrate Ion was estimated to be about 6 k