关键词: 废润滑油, 絮凝精制, 溶剂精制

Abstract: The flocculation refining and solvent refining experiments was carried out to show that solvent refining is better for the recycling the lubricating oil waste. The optimal conditions of furfural refining were as follows: the ratio of solvent and oil 1.5, refining temperature 80 ℃|while the optimal condition of NMP refining was 1.0, refining temperature 60 ℃, so the furfural refining had a larger economic profits. Under the optimal technology conditions, the properties of the recovered oil were listed as follows: viscosity index 102.6, 25 ℃ refractive index 1.459 4, colourity 1.0, solidifying point -16 ℃, w(carbon residual)0.499%, w(S)0.057%, oil recovery 93.96%. According to this result, the recovered oil could reach the HVI standard of base oil. And the recovered oil could be used as finished lubricating oil after adding suitable amounts of additives.

Key words: Lubricating oil waste, Flocculation refining, Solvent refining