A new process for aromatics extraction and distillation(SED-BTX)of hydrogenated catalytic cracking gasoline was developed by 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 benzene-toluene-xylene(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.
关键词
催化裂解汽油/芳烃/抽提蒸馏
Key words
catalytic cracking gasoline/aromatics/extraction and distillation
维普
万方数据