Abstract: LTAG technology developed by SINOPEC Research Institute of Petroleum Processing was used in the wax oil hydrotreating unit and FCC unit in SINOPEC Luoyang Company. The results show that the amount of hydrotreated diesel as FCC feed, drawing from the optimized fractionator in hydrotreatment system, reaches 25 t/h, more than the design value of 4.4 t/h. The end point of naphtha can be controlled in 155-175 ℃ range and the energy consumption is kept at about 250 MJ/t. The yield of FCC gasoline increases by 5.86 percentage points and the yield of diesel decreases by 4.92 percentage points. The diesel-gasoline ratio reduces to 0.78, 0.3 lower than before using LTAG technology, indicating a significant effect of the technology on reduction of diesel-gasoline ratio.

Key words: LTAG, diesel-gasoline ratio, energy consumption, wax oil hydrotreating