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Peeler Centrifuges, Basket Centrifuges
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Liquid-Liquid Extraction
Liquid - liquid extraction, also called solvent extraction, is a process that allows the separation of two or more components due to their unequal solubilities in two immiscible liquid phases. A feed solution initially containing one or more solutes is thoroughly mixed with an immiscible solvent having a different density. The mixing provides a large interfacial area so that efficient mass transfer of the desired solute can occur between the two immiscible liquids. The liquid-liquid dispersion created during the mixing is then separated by gravity or by centrifugal force depending upon the type of extractor selected. The mixing and separation steps constitute one stage of extraction. All of our extractors are stage-wise contactors rather than differential contactors. The solvent is chosen to selectively extract certain components from the feed solution. Depending upon the selectivity of the solvent and the amount of mass transfer required to achieve the desired solute recovery, several stages of extraction may be required. In this case, counter-current contact is the most efficient extraction method. Depending upon the process parameters (mass transfer, kinetics, density difference, etc...), two extraction technologies are available from Rousselet Robatel : Mixer-Settlers and Centrifugal Extractors. We offer Monostage and Multistage Centrifugal Extractors, also called Centrifugal Contactors. Selected Models of our Monostage Centrifugal Contactors are Annular Centrifugal Contactors. TYPES OF APPLICATIONS
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