Abstract

Production of light lubricating oil by furfural extraction using surfactant as an additive followed by dewaxing with urea was investigated in the present study. An investigation was conducted in order to examine the effect of the addition of ethoxylated anionic surfactant (SLES—sodium lauryl ether sulfate) to the fraction of the light lubricating (spindle) oil during the solvent extraction process. The aromatics in the lube oil were extracted at different temperatures ranging from 60 to 70°C with different concentrations of surfactant (from 0.01 to 0.1 wt %). The operating conditions of the urea adduct formation with n-paraffins were studied in detail. The activator and the solvent used in dewaxing are acetone and gasoline, respectively. Pour point, viscosity index and yield of oil produced by different steps were determined to show the effect of the operating conditions. For an extraction carried out at the temperature of 70°C, the quality of the raffinate was obtained with an increase in the yield for 13.41 wt %, by using a concentration of 0.1 wt % in SLES. According to the experimental results obtained from dewaxing with the increase in the quantity of urea, the yield of dewaxed products decreases and the yield of normal paraffins increases. Urea dewaxing has a greater effect on the pour point of lower viscosity cuts, as adduct formation is selective for n-paraffins.

中文翻译：

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乙氧基化阴离子表面活性剂作为萃取剂对轻质润滑油的精制和脱蜡

摘要

在本研究中，通过糠醛萃取，使用表面活性剂作为添加剂，然后用尿素脱蜡，生产轻质润滑油。为了研究在溶剂萃取过程中向轻润滑（主轴）油馏分中添加乙氧基化阴离子表面活性剂（SLES-月桂基醚硫酸钠）的影响，进行了研究。在60至70℃的不同温度下，以不同浓度的表面活性剂（0.01至0.1 wt％）萃取润滑油中的芳烃。尿素加合物的形成与所述的操作条件Ñ-石蜡进行了详细研究。脱蜡中使用的活化剂和溶剂分别是丙酮和汽油。确定了通过不同步骤生产的油的倾点，粘度指数和产率，以显示操作条件的影响。对于在70℃的温度下进行的提取，通过在SLES中使用0.1重量％的浓度，获得了提余液的质量，收率提高了13.41重量％。根据随脱蜡量增加而脱蜡获得的实验结果，脱蜡产物的收率降低而正构烷烃的收率提高。尿素脱蜡对降低粘度降低的倾点具有更大的影响，因为加合物的形成对正构烷烃具有选择性。