Solvent extractors pulsed column

In this case it is advisable to carry out backwashing of the solvent extract either batchwise or in a suitable extractor, such as a pulsed column, which will handle slurries satisfactorily. 

While solvent extraction is often done on a small scale by synthetic lab chemists using a separatory funnel or Craig apparatus, it is normally done on the industrial scale using machines that bring the two liquid phases into contact with each other. Such machines include centrifugal contactors, thin layer extractors, spray columns, pulsed columns, and mixer-settlers. 

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