Liquid-liquid extraction column - with two-sided castellated weirs on central tray openings for paddle mixer shaft

摘要

A column for a liquid/liquid counterflow extn. with inlets and outlets for a heavy and light phase is subdivided by trays into several extraction stages. Each tray has a central opening, surrounded by a castellated weir up and down, through which a rotor shaft with mixer paddles passes. This eliminates the detrimental effect of longitudinal mixing through the tray openings so that the column efficiency is improved and the phase sepn. is sepn. is speeded up.