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润滑油馏分油加助剂NMP溶剂精制 被引量:9

NMP Additive Assistant Refining Lubricated Fraction Oil
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摘要 采用物理抽提与化学反应相结合的方法提高润滑油精制过程中氮化物脱除率,即在润滑油NMP精制过程中加入助剂,使其与氮化物进行反应,从而脱除油中的氮化物,使润滑油基础油的氧化安定性变好。考察了NMP溶剂加助剂精制的碱氮脱除效果及对精制油性质和收率的影响。经过NMP溶剂加助剂单级抽提试验及假三段试验表明,NMP溶剂加助剂精制可有效脱除馏分油中的碱性氮化物,提高润滑油的氧化安定性,加入助剂的质量分数对精制油收率及折光率无显著影响。单级抽提适宜操作条件:剂油体积比为1.0,抽提温度为80℃,加入助剂的质量分数为0.7%。在此操作条件下,精制油收率为87%,60℃折光率为1.4598,碱氮的质量分数为67μg/g。假三段试验的适宜操作条件为:剂油体积比为0.75,加入助剂的质量分数为0.5%,上段温度为80℃,中段温度为70℃,下段温度为60℃,在此操作条件下精制油收率为88%,在60℃时折光率为1.4601,精制油碱氮的质量分数为57μg/g。 To improve denitride ratio in lubrication oil NMP refining for improving the stability of basic oil , the method of combing physical extraction and chemical reaction was applied , that is , adding additives to the NMP solvent refining process , letting the additives reacting with nitride to removing nitride compounds . This additive is appraised synthetically based on the rate of removing basic nitrogen, influence to the properties and yield of refined oil. The single stage and the simulating three stages experiments show that the NMP solvent refining with addition of assistant can remove basic nitrogen in distillate oil efficiently and raise the oxidation stability. The mass fraction of assistant has no remarkable effect on the yield of refined oil and its index of refraction. The optimum operation conditions for single stage refining are: solvent to oil volumic ratio is 1.0, extraction temperature is 80 ℃, the mass fraction of assistant is 0.7%. Under these conditions, the yield of refined oil is 87%, the index of refraction of 60 ℃ is 1.459 8 and the mass fraction of basic nitrogen is 67 μg/g. The optimum operation conditions for simulating three stages refining are: solvent to oil volumic ratio is 0.75, the mass fraction of assistant is 0.5% , extraction temperature is 80, 70 and 60 ℃ for top stage , middle stage and bottom stage,respectively. Under these conditions, the yield of refined oil is 88%, the index of refraction of 60 ℃ is 1.460 1, and the mass fraction of refined oil basic nitrogen is 57 μg/g.
出处 《辽宁石油化工大学学报》 CAS 2005年第1期13-15,19,共4页 Journal of Liaoning Petrochemical University
关键词 N-甲基吡咯烷酮 润滑油 助剂 氧化安定性 N-methyl-2-pyrrolidone Lube stock Assistant Oxidation stability
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