Patent ID: 9045384
Filing Date: 2015-06-02
Classification: B01D,C07C

Abstract:
1. A process for the adsorption-separation of a mixed-C 8 -aromatics feed stream into a meta-xylene product containing a defined ratio of meta-xylene to C 8 -aromatic impurities and a raffinate product, in which a head-flush purge fluid is removed from a process vessel containing an adsorption bed and at least one equalization chamber, comprising: a. passing an internal process fluid into the equalization chamber in a process vessel having at least one rounded head, b. passing a head-flush fluid into the equalization chamber, c. withdrawing a head-flush purge from the equalization chamber comprising varying ratios of meta-xylene and impurities, d. measuring the contained ratio of meta-xylene to impurities in the purge, e. distributing the purge through a valving system to: f. repeating step e. according to the determination of the weight ratio of meta-xylene to impurities in the purge.