摘要
N-甲基吡咯烷酮溶剂在润滑油精制过程中溶解能力强、选择性好,具有良好的环保性能。但碱氮脱除率较低,并且存在装置腐蚀问题。以石油一厂减压瓦斯油为原料,采用NMP溶剂加助剂精制来增加碱氮脱除率,最高脱除率可达84.54%。对一系列不同脱氮剂质量分数,不同剂油体积比的抽出液进行氢氧化钾乙醇标准滴定溶液滴定,利用消耗量计算其酸度。根据酸度的变化曲线,考察助剂质量分数与剂油体积比对酸度的影响。随着助剂质量分数的增大,其酸度增大,随着剂油体积比的增加,其酸度下降,助剂的加入对NMP溶剂本身的氧化无影响。
N-Methylpyrrolidone （NMP） used as .solvent for lube oil refining has strong dissolving ability, perfect selectivity, and good environmental protection function. But the rate of denitride is low, and the corrosion of the equipments is also a problem. The No.1 refinery＇s vacuum gas oil was use as feedstocks in the experiment, and it was refined by NMP .solvent and additive to increase the rate of denitride. The maximum denitrification rate reaches to 84.54%. A series of extractant, with different mass fraction of the denitrifier and diffcrent volumlic ratio of .solvent and oil, were titrated by the standard titration of potassium hydroxide and ethanol, and their aciditys were computed by the consumption of the standard titration. According to the acidity＇s curve, the effect of mass fraction of the denitrifier and volumic ratio of .solvent and oil on acidity is investigated, the acidity increases with the increasing of the mass fraction of the denitrifier, and decreases with the increasing of the vohmlic ratio of .solvent and oil. The denitrifier has no effect on oxidization of NMP solvent.
出处
《辽宁石油化工大学学报》
CAS
2005年第3期8-10,共3页
Journal of Liaoning Petrochemical University
