Abstract: The raffinate column in the eluxyl unit of an aromatics complex is the key fractionator to separate C8 aromatics from para-diethyl benzene (PDEB). PDEB is expensive and only if the PDEB content in C8 aromatics side cut is less than 25×10-6 mol/mol, the operation cost could be lowered effectively. The article describes the problems before revamping, the design philosophy and solution for the application of minitype high efficiency valve tray, the performance test results after revamping, and the comparison of operation data before and after revamping in a domestic aromatics complex. After one year and a half commercial operation, the operation is stable and the load is over 100%. The PDEB content in C8A side cut is less than 10×10-6 mol/mol or even less, and the product purity and recovery can be kept high, which all indicate that the revamping of the raffinate column can meet the requirement of actual production.