Thin Layer Extraction-A Novel Liquid-Liquid Extraction Method

摘要

The overall task of a liquid-liquid extraction process consists of selectively transferring solutes from a donor solution to a recipient solution through a liquid extractant,with the purpose of purifying the donor solution and/or recovering a valuable solute.Thin layer extraction(TLX)is a novel method to carry out this task,using specialized equipment and temporal modes of operation.In TLX,a minute amount of an extractant that is firmly attached as thin layer to a solid substrate is intimately and frequently brought into contact alternately with the donor and recipient solutions.TLX incorporates the complete extraction/stripping scheme into one single device.Following presentation of the underlying concepts,the structural,design,and operational aspects are discussed.TLX is applicable on a wide range of scales and can be easily scaled up to production floor size or down to the microscale.It has inherent operational,safety,and environmental qualities.