| 摘要 |
A process for the production of paraxylene by the catalytic isomerization of xylenes wherein the reaction zone effluent is fractionated in three columns in series with the overhead product of the second column in the series being sent to a paraxylene separation zone, C9 hydrocarbons being rejected as the bottoms product of the third column, and the overhead product of the third column being combined with the raffinate stream of the paraxylene separation zone and recycled to the isomerization zone.
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