采用二段萃取工艺精制CGO ,可在增加精制油收率 ,改善精制油质量 ,提高脱碱氮率等方面都有明显的效果。就辽河CGO而言 :采用二段萃取工艺与常规单溶剂萃取工艺相比 ,精制油收率提高 3 %～ 3 5 % ,脱碱氮率提高近 6%。二段萃取工艺在精制CGO中的应用 ,将为“延迟焦化—溶剂萃取—催化裂化组合工艺”提供一条新的萃取路线 The use of two-stage extraction of refined CGO can increase the refined oil yield, improve the quality of refined oil, improve the rate of nitrogen off and so have obvious effects. For Liaohe CGO: Compared with the conventional single-solvent extraction process, the yield of refined oil increased by 3% ~ 35% and the rate of nitrogen removal increased nearly 6%. The application of the second-stage extraction process to refined CGO will provide a new extraction route for the “delayed coking-solvent extraction-combined process of catalytic cracking”