A Multi-Stream Microchip for Process Intensification of Liquid-Liquid Extraction
Date
2017
Authors
Kriel, F.H.
Binder, C.
Priest, C.
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Journal article
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Chemical Engineering and Technology, 2017; 40(6):1184-1189
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Abstract
Solvent extraction is a critical step in many industrial mineral-processing circuits and is affected by chemical (e.g., metal ions, extractant, pH, reaction rate) and physical (e.g., interfacial phenomena, mass transport, temperature) factors. Here, a new type of microfluidic contactor is presented that enables higher volumetric throughputs and straightforward counter-current operation compared with Y-Y chips. A single chip design can handle a wide range of organic/aqueous phase ratios, thereby enabling stable operation for non-ideal solutions and fluctuating flow. An expression defining this widened operational window has been derived based on the relative stream geometries and liquid viscosities. A two-stage counter-current circuit is demonstrated for the extraction of platinum(IV) chloride.
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Copyright 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim