采用组合工艺提高辽河减压渣油轻油收率

以辽河减压渣油为原料，采用C5为溶剂，在压力4.0~7.0 MPa、剂油质量比4:1及温度160/180 ℃的条件下进行深度溶剂脱沥青试验，残炭降低率50%左右，90%以上的沥青质得到脱除，并富集到脱油沥青中。采用溶剂脱沥青-脱沥青油催化裂化-沥青残渣焦化组合工艺加工辽河减压渣油的研究结果表明：随溶剂脱沥青压力的提高，脱沥青油的收率增加，压力为7.0 MPa时，总脱沥青油收率达到74.22%，沥青残渣收率明显降低；轻、重脱沥青油催化裂化的平均液化气＋轻油收率分别为25.74%及12.72%，沥青残渣焦化的液化气＋轻油收率均值为7.17%。采用组合工艺技术，辽河减压渣油的液化气＋轻油收率较减压渣油直接焦化提高了4.06 百分点。

IMPROVING LIGHT OIL YIELD FROM LIAOHE VACCUM RESIDUE USING GROUP TECHNOLOGY

Liaohe vacuum residue (VR) deep solvent deasphalting test was conducted using n-C5 solvent at the conditions of solvent ratio 4:1 and 160/180 ℃ and . About 50% CCR and 90% asphaltene were removed and enriched in DOA. The group technology composed of deasphalting, catalytic cracking and coking was used to improve the light oil yield. The results indicate that with increasing the solvent deasphalting pressure, the deasphalting oil yields are increased. The total deasphalting oil yield reaches 74.22%, and the asphalt residue yield decreases significantly at 7.0 MPa. After catalytic cracking, the light oil plus LPG yields of light and heavy deasphalting oils are 25.74% and 12.72%, respectively. The light oil yield is about 7.17% by asphalt residue coking. Compared with coking, the total light oil yield of Liaohe VR is increased 4.06 % by using group technology.