Abstract: The solutions of maximizing gasoline using the existing units in Dagang petrochemical company were discussed. The main methods, such as broadening gasoline distillation range, increasing reforming unit feedstock, optimizing FCC raw materials and load, were taken to low diesel/gasoline ratio and raise yield of gasoline. The practices prove that in existing units, through production optimization, gasoline increases by 306 t/d and diesel/gasoline ratio drops from 2.43 to 1.60, while the benefit increases 21.9×104 Yuan /d.

Key words: gasoline , hydrocracking, catalytic cracking, diesel/gasoline ratio, cycle oil