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Yu-Wen Chiu

Chung-Sung Tan

A method for recovering supercritical extractant, such as supercritical CO , from a mixture containing the supercritical extractant and a solute is disclosed, which includes contacting the mixture with a molecular sieve membrane at a temperature and a pressure in a critical region of the extractant and near a critical point of the extractant so that a permeate rich in the extractant and a retentate having a enriched concentration of the solute in the extractant are generated. The molecular sieve membrane has a pore size significantly larger than a size of the extractant provided that the pore size is less than and close to sizes of clusters formed of the solute and the extractant at the temperature and the pressure.

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Hsinchu, Taiwan

Yu-Wen Chiu