In this article, we review recent advances in liquid membrane technology. We focus on the following three liquid membrane topics: biological application, an environmentally benign system and the use of microfluidic devices. Biocatalysis often shows an extremely high selectivity to a target compound. Therefore, a liquid membrane containing an enzyme can be utilized as a chiral separation tool for an optically active compound. To improve the liquid membrane stability, in the second topic, a novel "green" solvent ionic liquid is introduced in a supported liquid membrane. Since ionic liquids have extremely low vapor pressures, the liquid membrane permits stable operation for a long time. When a target molecule is expensive, a down sizing system is required for the liquid membrane operation. In the third topic, a stable three-phase flow was obtained using a microfluidic device. In the microfluidic operation, the center organic phase functions as a liquid membrane. In a micro-scale liquid membrane operation, permeation of rare earth metals through the membrane phase was achieved.
|Number of pages||16|
|Journal||Solvent Extraction Research and Development|
|Publication status||Published - Dec 1 2005|
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)