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m-Xylene is separated from a mixture of C 8 aromatic hydrocarbons (e.g., a raffinate from a p-xylene plant) by chromatography and distillation. Toluene (desorbent) and a mixture of C 8 aromatic hydrocarbons containing m-xylene are applied to a chromatographic separation apparatus packed with a zeolite strongly adsorbing m-xylene for separating the mixture into them -xylene fraction...
m-Xylene is separated from a mixture of C 8 aromatic hydrocarbons by a chromatographic process using a crystalline zeolite adsorbent followed by distillation. For example, a raffinate obtained from a p-xylene plant was treated chromatographically using KY zeolite as adsorbent and pseudocumene as solvent to give a m-xylene-rich fraction that was then distilled.
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