Patent ID: 8580120
Filing Date: 2013-11-12
Classification: B01D,C07C

Abstract:
1. A process for separating a product from at least one multicomponent feed by simulated countercurrent adsorptive separation in a simulated moving-bed adsorption apparatus comprising at least one rotary valve and plural sieve chambers, characterized by the steps of: (a) introducing a first multicomponent feed, comprising at least one desired product, through at least one fluid communication conduit into said apparatus; (b) withdrawing a first multicomponent extract, comprising at least one desired product, through at least one fluid communication conduit out of said apparatus; (c) flushing said at least one conduit in step (a) with at least one initial flushing medium, whereby residue of said first multicomponent feed is flushed from the at least one conduit in step (a) into said apparatus by the at least one initial flushing medium, so as to produce a first flush output comprising said at least one initial flushing medium and said residue of said first multicomponent feed; (d) flushing at least one conduit in step (b) with at least one initial flushing medium, whereby residue of said first multicomponent extract is flushed form the at least one conduit in step (b) out of said apparatus by the at least one initial flushing medium, so as to produce a first flush output comprising said at least one initial flush medium and said residue of said first multicomponent extract; (e) after step (c) flushing said at least one fluid communication conduit with a second flushing medium, with the proviso that said second flushing medium comprises said first flush output from step (d).