Abstract: The effects of rerefining of kerosene fraction injected through LTAG nozzle into FCC unit on product distribution and product properties were investigated in SINOPEC Shijiazhuang Refining and Chemical Company. The results show that the yields of dry gas, LPG and gasoline are increased, the feed quantity, feed composition and main operating conditions of FCC unit are kept stable, and the yields of diesel, slurry and coke are decreased after the rerefining jet fuel fraction. The (C₃+C₄) alkane content of the LPG product was increased, (C₃+C₄) olefin content was decreased, when the feed amount of heavy oil was kept at about 210 t/h, compared with the blank working condition without recycle. The aromatics volume fraction of the product gasoline was decreased by 0.2 percentage point and 0.5 percentage point under the conditions of rerefining kerosene fraction 11.2 t/h and 21.1 t/h, respectively; the volume fraction of benzene was increased by 0.05 percentage point and 0.07 percentage point, respectively; and RON was decreased by 0.2 and 0.6, respectively.

Key words: kerosene fraction, recycle refining, LTAG, product distribution, product property