减二线NMP抽出油同时制取芳烃油及裂化原料工艺研究

摘要

Aromatic carbon rate of second vacuum side NMP extract oil in a refinery is high as 5 1 .84%,and after being extracted with furfural solvent when the rate of solvent and oil is 3∶1 ,the arene content in heavy oil becomes over 90%,which meets the standard of high aromatic oil.It could be more effective with furfural plus petroleum e-ther extraction,when second vacuum side∶furfural∶petroleum ether=1∶1∶1 or second vacuum side∶furfural∶petrole-um ether=1∶1∶2,aromatic rate are 74.65%and 85.60%respectively.When furfural:second vacuum side =3, it costs less time and less energy to evaporate the solvent.Light oil cracking is obviously improved with furfural plus petroleum ether solvent and cracking performance is perfect when second vacuum side∶furfural∶petroleum ether=1∶1∶1 .%某炼油厂减二线NMP抽出油芳碳率高达51．84％，将此抽出油利用糠醛单溶剂再抽提，剂油比为3时重相油中芳烃质量百分含量在90％以上，芳碳率在70％以上，满足高芳烃油芳烃含量要求。利用糠醛＋石油醚再抽提此抽出油效果比单用糠醛更好，在减二抽：糠醛∶石油醚＝1∶1∶1和减二抽∶糠醛∶石油醚＝1∶1∶2时，重相油中芳烃质量百分含量均在90％以上，芳碳率分别为74．65％和85．60％；重相油中糠醛含量比糠醛∶减二抽＝3时少，蒸出溶剂耗能耗时较少。双溶剂处理后轻相油裂化性能均较处理前优化明显，在减二抽：糠醛∶石油醚＝1∶1∶1时裂化性能更佳。