为了提高糠醛的脱氮能力，把一种自制的成本低、来源广、使用方便的酸性脱氮剂加入到糠醛中，用减二线、减三线及丙烷脱沥青油在小型连续抽提装置上模拟工业生产条件， 进行连续萃取试验． 结果表明， 当酸性助剂的质量分数达到０ ．５０ ％ 时，减二线与减三线油的碱氮脱除率达９５ ％ 以上，丙脱油脱氮率达６０ ％ 以上； 酸性助剂的加入不影响精制油的酸值． 该酸性助剂在润滑油糠醛精制的同时，可明显提高脱氮效果 In order to improve the ability of denitrification of furfural, a self-made low-cost, wide-sourced and easy-to-use acidic denitrifying agent was added into furfural to simulate the desorption of the second and third trimester and propane deasphalting oil on a small continuous extraction unit Industrial production conditions, continuous extraction test. The results show that when the mass fraction of acid additives reaches zero. 50%, the rate of removing alkali and nitrogen from second line and third line oil is more than 95%, and the rate of denitrification is over 60%. The addition of acid additives does not affect the acid value of refined oil. The acid additives in the lubricant furfural refined at the same time, can significantly improve the effect of denitrification