An oscillating feedback micro extractor comprised of an inlet channel, two Coanda steps, a diverging chamber, two feedback channels, a splitter, and an outlet channel was designed using the Coanda effect. The mass transfer performance was investigated in a texting system using a 30% tributyl phosphate-kerosene solution as the organic phase and a 3-mol/L HNO<sub>3</sub> solution as the aqueous phase. The parameters which impact on mass transfer such as the volumetric flux of immiscible liquid–liquid two phases and the structure of the feedback channel were investigated. The experimental results indicated that the arrangement of asymmetric feedback channels had better extraction performance owing to the more unbalanced transverse forces. In addition, the extraction efficiency (acid distribution coefficient/equilibrium acid distribution coefficient) increased with the increase of Reynolds number, and almost complete extraction was achieved using the asymmetric feedback channels. The overall volumetric mean mass transfer coefficients were two or three orders of magnitude higher than those traditional liquid-liquid large-scale extractors.

Intensification of liquid–liquid two-phase mass transfer in a high-throughput oscillating feedback micro extractor

254th National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.