Patent ID: 7422685
Filing Date: 2008-09-09
Classification: B01D,G01N

Abstract:
1. A device for continuous separation of the constituents of a feed in liquid solution of at least two constituents (A, B) having different partition coefficients such that they are carried along at unequal velocities respectively by a lighter solvent and a heavier solvent, comprising at least one liquid-liquid centrifugal chromatographic column (col) consisting of the interconnection in series of at least one chain of separation cells (CE), characterized in that each column is associated with a first pump (P 1 ) for injecting the feed at an intermediate point of the chain of cells, a first valve (V 1 ) connecting a first end of the column to a first vessel for collecting a first constituent (FA) or to a second pump (P 2 ) for injecting a first solvent (L), a second valve (V 2 ) connecting a second end of the column to a second vessel for collecting a second constituent (FB) or to a third pump (P 3 ) for injecting a second solvent ( 1 ), alternating valves (V 1 , V 2 ) switching means so as to switch alternately from a first stage with injection of the first solvent (L) and reception of the separated second constituent (FB) to a second stage with injection of the second solvent ( 1 ) and reception of the separated first constituent (FA), and means for controlling the pump flow rate.