Procedure co-production of paraxylene and metaxylene / or ortho-xylene.

摘要

Procedure co-production of paraxylene and metaxylene / or ortho-xylene.; Comprises [1] a step of separation simulated moving bed in a column (9) chromatography containing a plurality of beds of an adsorbent, said column comprising an injection zone (3) of the load, an evacuation zone (10 ) of an extract consisting of paraxylene and desorbent, a fraction (11) intermediate containing ethylbenzene, and raffinate (12) containing a mixture of metaxylene and orthoxylene substantially free of ethylbenzene and paraxylene and [2] a crystallization step ( 27) of the fraction metaxylene and / or orthoxylene.