Introduction
Liquid - liquid
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 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.
Depending upon
the process parameters (mass transfer, kinetics, density difference,
etc...), two extraction technologies are available: Mixer-Settlers
and Centrifugal Extractors. We offer CTL model direct connecting
Centrifugal Extractors, also called Centrifugal Contactors. Selected
Models of our CTL Centrifugal Contactors are Annular Centrifugal
Contactors.
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