The static equilibrium of dichlorobenzene mixture in liquid phase was studied on a binder-free MFI zeolite adsorbent. The selectivity factor for para-dichlorobenzene/ortho-dichlorobenzene determined is 12.31. A series of desorbents matched with the adsorbent such as benzene, toluene, ethylbenzene, mono-chlorobenzene, and para-diethylbenzene were investigated as well. The adsorbent can be regenerated and used without controlling the content of water. The isotherms of each dichlorobenzene isomer and the desorbents show the adsorption characteristics of Langmuir type. The saturation adsorption capacities of the adsorbates on the adsorbent were determined. No adsorption of meta-dichlorobenzene was found. The competitive adsorption curves of multi-component feed were also investigated. The high shape-selectivity of separation is related to the special structure characters of the zeolite in the adsorbent.
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