Abstract: The present paper introduces the industrial application of the high liquid yield additive SLE for FCC process in a RFCC unit of SINOPEC Jingmen Company with a capacity of 1.2 Mt/a. The results show that when the content of the additive attains a level of 10.7% in the inventory, comparing with the blank test, the increases of total liquid yield and gasoline yield are 2.79% and 5.56%, respectively, while the decreases of slurry, coke, and LCO yields are 1.31%, 0.79%, and 4.60%, respectively. It is noticeable that the residue content of the feedstock is increased by 3% during all the period of the test. Except the properties of slurry and LCO are somehow worse than that of blank test, no other significant changes are observed. The results prove that the additive significantly enhances the profit of the RFCC unit by improving residue conversion and enhancing liquid product yield.

Key words: RFCC, total liquid yield, gasoline, additive