Patent ID: 6136198
Filing Date: 2000-10-24
Classification: B01D

Abstract:
A process for separating at least one component of a mixture that contains it, comprising introducing said mixture into a device that has a set of chromatographic columns or chromatographic column sections that contain an adsorbent and are arranged in series and in a closed loop, whereby the loop comprises at least one feedstock injection point, a raffinate draw-off point, an eluant injection point, and an extract draw-off point, in which a chromatographic zone is determined between an injection point and a draw-off point or vice-versa, and at the end of a given period of time, shifting all of the injection and draw-off points by one column or column section in a given direction that is defined relative to that of the flow of a main fluid that circulates through the loop, and during said period, shifting different injection and draw-off points of a column or column section at different times such that the lengths of the zones that are defined by said different points are variable.