Journal ArticleDOI
An Experimental Study of Copper Extraction Characteristics in a T‐Junction Microchannel
TLDR
In this paper, the authors investigated the performance of a T-junction microchannel with both reaction intrinsic kinetics and mass transfer and found that the maximum extraction efficiency is about 0.96, and the apparent overall volumetric mass transfer coefficient (kappa) is in the range of 0.02-0.2s-1.Abstract:
The extraction performance in a T-junction microchannel was investigated experimentally. CuSO4/H2SO4/AD-100/260# solvent oil was chosen as the working system. The velocities of the aqueous and oil phases were varied from 0.0016 to 0.45 ms-1, with ReM varying between 9 and 200. The experimental results show that the extraction process of copper in the microchannel is controlled by both reaction intrinsic kinetics and mass transfer, depending on the characteristics of the reaction and the fluid hydrodynamics. The maximum extraction efficiency is about 0.96, and the apparent overall volumetric mass transfer coefficient (kappa) is in the range of 0.02-0.2s-1. In addition, the effects of the Cu2+ concentration and the pH in the aqueous phase, the volumetric fraction of AD-100 in the oil phase, and the temperature on the extraction performance were investigated in detail.read more
Citations
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Journal ArticleDOI
Safety assessment in development and operation of modular continuous-flow processes
TL;DR: In this article, the energy balance and kinetic parameters describe the heat production potential and, together with heat transfer capability, the temperature development in a continuous flow reactor, and checklists for laboratory safety and risk assessment are the basis for improved laboratory work as well as for equipmentrelated safety discussions.
Journal ArticleDOI
The use of microfluidic devices in solvent extraction
TL;DR: In this paper, the use of microfluidic devices in solvent extraction is described and a detailed review of the advantages of micro dimensions that result in laminar flow conditions, high surface-to-volume ratio and the reduced chemical quantities needed.
Journal ArticleDOI
Microfluidic solvent extraction of rare earth elements from a mixed oxide concentrate leach solution using Cyanex® 572
Elisabeth Kolar,Rik P.R. Catthoor,Frederik H. Kriel,Rossen Sedev,Scott Middlemas,Eric Klier,Gareth Hatch,Craig Priest +7 more
TL;DR: In this paper, the authors investigated microfluidic solvent extraction of rare earth elements (REEs) from a leached mixed rare earth oxide (REO) mineral concentrate using a phosphorus-based cationic exchange extractant (Cyanex® 572).
Journal ArticleDOI
Intensified Eu(III) extraction using ionic liquids in small channels
Qi Li,Panagiota Angeli +1 more
TL;DR: In this article, the mass transfer coefficients were found to be higher in the small channel, where recirculation within the plugs and interfacial area are large, compared to the large channel for the same mixture velocities and phase flow rate ratio.
Journal ArticleDOI
Formation of liquid–liquid slug flow in a microfluidic T-junction: Effects of fluid properties and leakage flow
TL;DR: In this article, the authors investigated the characteristics of liquid-liquid slug flow in a microchannel with focus on the leakage flow that bypasses droplets through channel gutters and found that leakage flow contribution varies in a range of 10.7-53.5% and 8.3-30.9% of the feed flow rate, respectively, during the droplet formation and downstream flow.
References
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TL;DR: In this paper, the basic principles of Mixer-Settler design are presented. But they do not consider the use of a simple box-type mixer-settler.
Journal ArticleDOI
Hydrodynamics and mass transfer characteristics in gas–liquid flow through a rectangular microchannel
TL;DR: In this paper, hydrodynamics and mass transfer characteristics in cocurrent gas-liquid flow through a horizontal rectangular microchannel with a hydraulic diameter of 667 μ m have been investigated experimentally.