Abstract: By analysis on the cause of abnormal operation of the raffinate column of PX unit of SINOPEC Jinling Co., technical measures were suggested and applied. The improving measures include repairing air/water coolers, enlarging the diameter of vapor stream pipline in top condenser system, strengthening the feed liquid/vapor distributer, using multiple ruffled downcomer, and moving up the side drawing outlet. By successful revamping, the bottleneck of fractionation process operation is eliminated and the raffinate oil overload operation of the column is realized.

Key words: PX unit, raffinate column, process analysis, debottlenecking