关键词: 催化裂解汽油, 芳烃, 抽提蒸馏

Abstract: A new process for aromatics extraction and distillation (SED-BTX) of hydrogenated catalytic cracking gasoline was developedby establishing a comprehensive phase equilibrium data package and process simulation system. This process takes extraction distillation as the core, combines extraction distillation and liquid-liquid extraction organically, and makes use of their respective advantages to achieve the goals of energy conservation and carbon reduction, as well as high recovery rate and high purity of BTX products. The SED-BTX process was successfully applied to a 350 kt/a industrial plant in one run. The results showed that the yield and purity of benzene product reached 99.9% and 99.99% respectively, that of toluene product reached 99.9% and 99.98% respectively,the non-aromatic content in the raffinate oil was over 99.3%, and the sulfolane content was less than 1 μg/g. The comprehensive energy consumption of the whole unit including the distillation unit was 56.6 kgOE/t（1 kgOE=41.8 MJ）, which was 25% lower than the traditional liquid-liquid extraction process.

Key words: catalytic cracking gasoline, aromatics, extraction and distillation