Abstract
Pertraction of phenol in a bulk liquid membrane pertractor of the “hollow-fibres in tube” type was studied. n-Alkanes and solutions of triisobutylphosphine sulfide (TIPS) in n-alkanes were used as membrane phase. Pulsation of the membrane phase increases the mass flux by more than 40% at relatively low pulse velocity. Wettability of the microporous walls plays an important role. It is preferable when the feed flows in hydrophobic fibres and the stripping solution is in contact with the hydrophilic wall. Pertraction through a membrane with TIPS was three times faster due to a higher distribution coefficient for phenol. Analysis of mass-transfer resistances of the different liquid layers in the pertractor is presented. The mass flux per unit volume of pertraction varied from 20 to 70 mol-m −3-hr −1, which is several times larger than the value for other types of bulk liquid membrane equipments.
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