초록
<P>The ability of a number of ionic liquids to extract 1,3-propanediol and 2,3-butanediol from aqueous solution was investigated. A range of hydrophobic ionic liquids were prepared and compared. The long chain phosphonium salts containing the trihexyltetradecyl phosphonium [P<SUB>66614</SUB>] cation exhibited promising extraction behavior. Among them, [P<SUB>66614</SUB>] [octanesulfonate (C<SUB>8</SUB>SO<SUB>3</SUB>)] combined high hydrophobicity, good stability, and relatively high extraction efficiency with the distribution coefficient <I>D</I><SUB>BDO</SUB> = 0.390 and extraction selectivity <I>S</I><SUB>BDO</SUB> = 4.83 (2,3-butanediol) and <I>D</I><SUB>PDO</SUB> = 0.219 and <I>S</I><SUB>PDO</SUB> = 2.65 (1,3-propanediol) at 25 °C. Additionally, this material exhibited good compatibility with the fermentation process, facilitating its use in bioprocesses.</P><P>Ionic liquid trihexyltetradecylphosphonium 1-octanesulfonate ([P<SUB>66614</SUB>][C<SUB>8</SUB>SO<SUB>3</SUB>]) can be used to extract diols from aqueous solution; [P<SUB>66614</SUB>][C<SUB>8</SUB>SO<SUB>3</SUB>] is insoluble in water and biocompatible.</P><P><B>Graphic Abstract</B><BR><IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ascecg/2017/ascecg.2017.5.issue-9/acssuschemeng.7b01934/production/images/medium/sc-2017-019348_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/sc7b01934'>ACS Electronic Supporting Info</A></P>