On the principle of complexation,an effective process for removing basic nitrogen compounds (BNC) from lube base stocks was developed by extraction with furfural solution containing a minor amount of transition metal ion as complexing agent.

• 利用络合反应原理，在润滑油糠醛精制过程中，加入少量的过渡金属离子作为络合剂，可以有效地脱除润滑油原料中的碱性氮化物。