以多产优质汽油为目标，开发了加氢催化柴油进第二提升管多产汽油工艺，通过不同反应条件下的中试考察，得到了相应的产品分布和产品性质。2016年该工艺在中石化长岭分公司1^#催化FDFCC-Ⅲ装置成功进行了工业应用，应用结果表明，加氢催化柴油进第二提升管回炼可以大幅度提高汽油收率，装置汽油收率可提高20%多，达到63%以上，副分馏塔粗汽油RON可达98~99，全装置稳定汽油RON提高约1个单位，达到95以上，经济效益十分显著。

In order to raise yield of high quality gasoline,the process of HLCO entering the secondary riser to increase gasoline yield is developed.The product distribution and product properties are obtained through the pilot trials under different conditions.The process has been applied successfully in 1^# FDFCC-Ⅲ unit of SINOPEC Changling Company in 2016.The application result shows that the yield of gasoline by this process increases more than 20%,even above 63%,the RON of naphtha obtained in the second riser reaches 98-99,and the RON of stabilized gasoline for the whole unit increases about 1 unit to above 95,showing a remarkable economic benefit.