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Thin layer extraction
Thin layer extraction is a time-periodic reactive liquid extraction process that provides excellent mass transfer while maintaining phase separation.〔Lavie R., “Thin Layer Extraction – A Novel Liquid-Liquid Extraction Method”, AIChE Journal, 54, Issue 4, Pages 957-964, 2008. DOI: 10.1002/aic.11445.〕 It is performed via a periodic batch production process the controls the time of each chemical reaction..
==Approach==
A small amount of a liquid organic extract is spread, as a thin layer, onto a matrix made of a thin microporous material whose surfaces are freely accessible from and to the outside. The extract is held by capillary forces or other forces. This layer is alternately and repeatedly brought into brief contact with thin layers of the donor and the strip aqueous liquid. In the extraction step, selected species that are present in the donor solution are transported from the donor aqueous solution to the organic phase where a reaction ensues. In the stripping step the reaction reverses and the extracted species are stripped into the strip aqueous solution. Thus, two alternate product batches are generated: a raffinate and a strip product. As each of the species to be separated associates differently with the host, the composition of the raffinate and strip product is differentiated.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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