Daxie petrochemical disproportionation unit has been put into operation

On January 11, the 3.4 million tons/year disproportionation unit of the Phase IV project of Daxie Petrochemical produced qualified products, marking a phased victory in the start-up of the aromatics complex of Daxie Petrochemical.

The disproportionation unit is a supporting unit of the aromatics complex in the Daxie Petrochemical distillate comprehensive utilization project system.Through disproportionation and transalkylation technology, using toluene and C9/C10 aromatics as raw materials, under the condition of hydrogen and the presence of catalysts, the aromatics with lower added value are converted into benzene and xylene products with higher added value.In addition, the disproportionation device adopts a high-efficiency flue gas waste heat recovery system, and the overall thermal efficiency of the heating furnace reaches 95%.During the design process, the disproportionation unit of Daxie Petrochemical used the disproportionation tail hydrogen recontact process to remove most of the benzene and heavier components above benzene in the disproportionation tail hydrogen, prolong the operating cycle of the adsorbent in the pressure swing adsorption unit, and reduce the operating cost of the unit.