[Chemical Engineering & Technology] A multi-stream microchip for process intensification of liqu
Solvent extraction (SX) 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. We present a new type of microfluidic contactor that enables higher volumetric throughputs and straight-forward counter-current operation, compared with Y-Y chips. A single chip design can handle a wide range of organic/aqueous phase ratios (R), enabling stable operation for non-ideal solutions and fluctuating flow. An expression defining this widened operational window is derived based on the relative stream geometries and liquid viscosities. A two-stage counter-current circuit is demonstrated for extraction of platinum (IV) chloride.
Frederik H. Kriel, Claudia Binder, Craig Priest Accepted manuscript online: 28 March 2017 DOI: 10.1002/ceat.201600728