Modeling extraction equilibria of butyric acid distributed between water and tri-n-butyl amine/diluent or tri-n-butyl phosphate/diluent system: Extension of the LSER approach

Senol A., Lalikoglu M., Bilgin M.

FLUID PHASE EQUILIBRIA, vol.385, pp.153-165, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 385
  • Publication Date: 2015
  • Doi Number: 10.1016/j.fluid.2014.10.043
  • Journal Name: FLUID PHASE EQUILIBRIA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.153-165
  • Istanbul University Affiliated: Yes

Abstract

Extraction of butyric acid from water by tri-n-butyl amine and tri-n-butyl phosphate dissolved in oxygenated polar diluents of proton-donating and proton-accepting types (1-octanol, acetophenone, ethyl butyrate, ethyl pentanoate, ethyl nonanoate, diethyl malonate), as well as a comparison with extraction equilibria of pure diluent alone have been studied at 298 K. Among the tested diluents, 1-octanol alone yields the highest extraction efficiency. The strength of complex formation is larger for tri-n-butyl amine as compared to tri-n-butyl phosphate both favoring mainly the formation of acid(1)-extractanti structure. Ethyl butyrate promotes more readily the solvation of the formed organic phase complexes.