Abstract: The aromatics extraction unit of a petrochemical company was put into operation in 1995, and the original design did not take into account the production of hexane solvent oil.After a transformation in May 2001, it became capable of producing hexane solvent oil that could meet the internal supply standards of the enterprise. To further improve the quality of hexane solvent oil, a transformation plan for the No.60 industrial hexane solvent oil project was proposed. Through the selection of several transformation plans, it was decided to move the No.6 solvent extraction line of the solvent oil separation tower downward to the original No.120 solvent extraction line position and add a packing section between the hexane component and the No.6 solvent oil extraction to enhance their separation effect. At the same time, by simply adjusting the process and reusing the existing pump, the transformation cost was reduced. After implementation in August 2024, No.60 industrial hexane solvent oil that can meet the GB/T 17602—2018 standard was produced, and the output of No.60 industrial hexane solvent oil was also increased.

Key words: aromatics raffinate hydrogenation, No.60 industrial hexane solvent oil, transformation plan selection