PROCESS AND APPARATUS FOR SIMULATED COUNTER-CURRENT CHROMATOGRAPHIC SEPARATION FOR HIGH-PRODUCTIVITY PRODUCTION OF PARAXYLENE

摘要

PROBLEM TO BE SOLVED: To improve purity, a paraxylene yield, and productivity very significantly in relation to the prior art.SOLUTION: This invention relates to a process for the separation of paraxylene by simulated counter-current (SCC) chromatography from a feed stock (F) essentially comprising paraxylene and its aromatic C8 isomers, wherein the process is carried out in an adsorber and is characterized in that it has a cumulated height (Hcu) of adsorbent solid in relation to the whole of the adsorbers of between 6 and 21 m and the mean superficial velocity (Vsl) over each adsorber is between 1 and 2 cm/s.