Patent ID: 9365470
Filing Date: 2016-06-14
CPC Classification: B01D,C07C

Claim Text:
1. A process for simulated counter-current (SCC) chromatographic separation of a feed F having at least one adsorption column divided into zones, each zone comprising a certain number of beds, said column being composed of a plurality of beds of adsorbent separated by plates P i each comprising a distribution/extraction system, in which process the feed F is supplied to at least one supply point and a desorbant D is supplied to at least one supply point, and at least one extract E and at least one raffinate R are extracted, the supply and withdrawal points being shifted over time by a value corresponding to one bed of adsorbent with a switch period ST and determining a plurality of functional zones of the SMB, each zone being included between an injection point and the immediately consecutive withdrawal point, or between a withdrawal point and the immediately consecutive injection point; the process being characterized in that the feed and desorbant injection streams are each divided into N streams (N being a whole number strictly greater than 1), injected respectively into N distinct feed injection points and N distinct desorbant injection points, and in that the extract and raffinate withdrawal streams are also each divided into N streams each withdrawn from N distinct withdrawal points, the device being constituted by 4×N chromatographic zones, in which process the injection and withdrawal points are positioned such that: