| abstract |
The invention provides a process system for producing para-xylene from mixed aromatic hydrocarbons, comprising a xylene fractionation unit, an adsorption separation unit, an isomerization reaction unit, a disproportionation and transalkylation unit and an alkylation unit; Alkylation unit was added, and the isomerization product separation column and the disproportionation and transalkylation reaction product separation column were set as dividing wall columns, in addition, the material reflux was set more reasonably. The invention improves the conversion rate of toluene, makes full use of the conversion of product benzene to p-xylene, and adopts the dividing wall column technology to achieve the purpose of separating the reactant and the reaction product in one column, thereby reducing the energy consumption of the device and improving the high efficiency. The value-added product paraxylene yield improves economic and social benefits. |