Abstract
We present a new procedure for purifying nonionic surfactants (alkyl polyglycolethers C i E j ). The method utilizes the well-known phase behavior of ternary systems of water, oil, and nonionic amphiphiles to simultaneously extract water-soluble and oil-soluble impurities. The three-phase extraction technique (denoted as 3PHEX) is easy to apply, it is efficient and yields reproducible results. For surfactants ranging from C6E3 to C18E8, we tabulate the optimal purification conditions.
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© 1991 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
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Schubert, K.V., Strey, R., Kahlweit, M. (1991). 3PHEX: A new surfactant purification technique. In: Corti, M., Mallamace, F. (eds) Trends in Colloid and Interface Science V. Progress in Colloid & Polymer Science, vol 84. Steinkopff, Heidelberg. https://doi.org/10.1007/BFb0115946
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DOI: https://doi.org/10.1007/BFb0115946
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