Liquid-liquid laboratory extractor PILOEX 250-SR

This mixer-settler apparatus has been designed to study liquid-liquid-extraction processes. One part of the component, which has to be separated from the liquid phase (raffinate phase) is extracted by means of a liquid solvent (extract phase). This component is concentrated in the solvent (extract phase from the extraction phase to extraction phase). The raffinate phase and the extract phase will be led through the system in opposite directions. The advantage of the mixer-settler apparatus is the high efficiency of the exchange stages. The latest re-design of EMS 250 SR liquid-liquid extractor consists of a 10-stage Mixer-Settler arrangement to work simultaneously. Each stage consists of a mixer with downstream settler. In the mixer the light and the heavy phase from the neighbouring stages are brought together, are intensively mixed and then simultaneously conveyed into the settler. The mixing is realized by motor driven spiral stirrers for each mixing stage. Due to the intensive mixing the phases are divided into drops, so that the greater exchange surface, the substance transfer from one phase to another is heavily intensified. Together with the component to be extracted, e.g. heavy phase, the raffinate phase is pumped from the raffinate store into the mixer of the last stage of the extractor. The solvent, e.g. light phase is pumped from the corresponding store tank into the mixer of the first stage of the extractor. Both phases, raffinate and extract are led into opposite directions through the extractor, the raffinate phase from the last stage and the extract phase from the first to the last extraction stage.