Abstract: This paper studies a new technology which converts C9+ heavy aromatics and non-aromatics into BTX (benzene, toluene and xylene), ethane, propane and a small amount of methane and butane via dealkylation, transalkylation and non-aromatics cracking reactions in the presence of catalysts, and benzene, toluene and mixed xylene can be separated via simple distillation without solvents. It has the characteristics of high value-added products, low energy consumption and eco-friendliness. The economic comparison of this advanced technology with the traditional aromatics extraction technology shows that this new technology can produce considerable economic and social benefits and is worth popularization.

Key words: pyrolysis gasoline hydrogenation, producing more BTX from C6+ fractions, aromatics extraction；economic comparison