Abstract: Based on the analysis of present gasoline production and the plant process simulation, 14 solutions for production of China Ⅵ gasoline were discussed. The results show that in the first stage of gasoline quality upgrading, in which olefin volume content is less than 18%, the case consisted of FCC for olefin reduction-isomerization-alkylation is the best. In the second stage of gasoline quality upgrading in which olefin volume content is less than 15%, the process composed of large etherification (refined gasoline from two S Zorb units as feed) plus once-through mode isomerization is the best. For the solution including a new set of reforming unit, one new reforming unit-small etherification (refined gasoline from one S Zorb unit as feed) - isomerization with cycling mode is the best. It is concluded that the combination process of etherification and isomerization is recommended because it costs least and has the best benefit.

Key words: Alkylation, catalytic reforming, Isomerization, Etherification, technical economy, gasoline quality upgrading