In order to fabricate rubber packing oil satisfied with some standards,extract oil,a byproduct during solvent refining of lubricating oil,was refined using N-methyl-2-pyrrolidone(NMP).

• 为了研制符合一定标准的橡胶填充油,以N-甲基吡咯烷酮(NMP)为溶剂对润滑油溶剂精制过程中的副产物抽出油进行抽提。