Process and apparatus for the production and recovery of p-xylene

摘要

A mixed aromatic stream is hydrotreated to remove olefins and fractionated to separate C9+ heavies in a distillation column reactor and the C8 and lighter material is fed to a selective adsorption unit where the para-xylene is removed. The para-xylene depleted raffinate therefrom may be subjected to isomerization to form additional para-xylene. The effluent from the isomerization can be fed to the distillation column reactor for hydrogenation of any olefins formed during the isomerization or directly to the adsorption unit.