Regeneration of Used Lubricating Oils by Supercritical Fluid Extraction

Regeneration of used lubricating oils by supercritical fluid extraction were investigated. The broken-down additives and impurities were removed by the high selectivity of supercritical fluid, and high-quality lube oil was obtained. Corrosion and waste-disposal problems produced by older acid-clay process have been lessened.     

Regeneration of Used Lubricating Oils by Supercritical Fluid Extraction

Abstract

Regeneration of used lubricating oils by supercritical fluid extraction were investigated. The broken-down additives and impurities were removed by the high selectivity of supercritical fluid, and high-quality lube oil was obtained. Corrosion and waste-disposal problems produced by older acid-clay process have been lessened.     

废润滑油再生技术研究进展

从硫酸-白土精制工艺、溶剂精制组合工艺、加氢精制组合工艺综述了国内外废润滑油再生技术的研究进展,展望了我国废润滑油再生技术的研究趋势.     

废润滑油再生的研究进展

介绍了废润滑油的组成成分;从原理和优缺点两方面综述了硫酸-白土工艺、溶剂萃取、加氢精制等传统再生工艺和分子蒸馏、超临界萃取、膜处理等新型的废润滑油处理工艺;并展望了润滑油再生的前景。随着具有吸附量大、催化效应的纳米材料的快速发展以及稳定性好、耐腐蚀性膜的研究,纳米技术和膜技术将会成处理废润滑油的热点。     

Treatment and Regeneration of Used Lube Oils with Inorganic Membranes

The results of treatment and regeneration of used lube oils with inorganic membranes on graphite and ceramic supports made in laboratory conditions are presented. Experience in use of 190 industrial treatment units with such membranes is generalized.     

绿色润滑油的发展

简述了绿色润滑油的组成和特点,指出植物油与合成酯结合使用是绿色润滑油的发展趋势.     

A New Dithiophosphate Additive for Lubricating Oils

Technology was developed for production of TsD-7 dithiophosphate additive and its industrial production from a mixture of primary and secondary short-chain alcohols was organized. The lubricating, antioxidant, and scavenger properties of this additive in mineral oil were determined both combined with ash detergents and with no other additives in comparison to the properties of existing dithiophosphates. The results of bench engine tests of the new additive in group D motor oil are reported. The expediency of using the additive in oils for heavy-duty engines is demonstrated.     

润滑油结焦行为的实验室评价

搭建了1套油品高温氧化结焦行为的实验室评价装置,并测定了两种润滑油高温氧化后的极性和非极性结焦前驱物及结焦的组成,研究了其热氧化结焦行为;同时,还考察了温度（200~280℃）和时间（4~24 h）对最终结焦量的影响。结果表明,随着温度的升高和时间的延长,润滑油的氧化程度加深,生成结焦的倾向增大。在此基础上可以通过结焦量-温度-时间三维图确定润滑油的安全使用范围。     

纸色谱法在润滑油鉴别中的应用

根据润滑油的组成特性,提出了基于纸色谱的润滑油鉴别方法,建立了该方法的系统结构,并以VB 6.0为工具开发了基于灰度直方图和HSV直方图的润滑油纸色谱图检索软件.针对一批油品进行了试验,结果表明,纸色谱法能够实现润滑油的鉴别,并且实验操作简便.     

合成润滑油在冷冻系统中的应用

综述了聚α-烯烃、烷基苯、聚醚、双酯、新戊基多元醇酯、硅酸酯、氟油等合成润滑油在冷冻系统中的应用。     

Modeling of the Furfural Refining Process for Lubricating Oils

The effect of operation temperature and furfural/oil ratio on a single-stage furfural refining process for two distillates was studied. The acid number, basic nitrogen, refractive index and aniline point of each of the distillates and the refined oils were measured. They were assumed as four oil components, and the liquid-liquid equilibrium data and corresponding partition coefficients of the pseudo-components could be determined through mass conservation equations and simulated based on the artificial neural networks method. A multistage mathematical model for the refining process was established and solved numerically to give the refined oil quality and recovery under various furfural/oil ratios, temperatures, and stages, which showed a good agreement with those obtained from a pilot plant and the separatory funnel experiments under similar operation conditions. This paper may provide a useful way to assist in determining the optimum conditions and designing plant for the furfural refining process.     

Simulation of Solvent Extraction for Naphthenic Lubricating Base Oils

Solvent extraction is the process of separating aromatics from vacuum distillates for the production of lubricating base oils. In this study, the authors use dimethyl sulfoxide(DMSO) instead of furfural as solvent, in light of its higher selectivity, to obtain extracts with a high aromatic content for naphthenic lubricating base oils. We systematically investigated effects of the solvent-to-oil(S/O) ratio and extraction temperature on the yield of the extract, efficiency of aromatic removal, and...     

汽车新能源及润滑油的发展

汽车新能源主要有替代燃料和电能,其研发异常活跃,并开始用于公交和出租等车辆,有望成为今后的发展主流。随着石油资源的日益紧张,新能源的发展备受关注,减轻了对石油产品的依赖程度。燃料的变化还引起了发动机润滑油性能要求的改变,出现了醇燃料发动机油和燃气发动机油。文章对气体燃料和醇燃料等代用燃料的性能和使用现状进行了概述,并对未来发展趋势进行了描述,认为电动汽车及混合动力汽车将越来越多地投入使用,替代燃料的比例也会增长,发动机油将随着替代燃料的使用而进一步的发展。     

工业用油稠化剂的选择与应用

选择了聚乙烯基正丁基醚（Ｔ６０１）作为主要的工业用油稠化剂,考察了该剂在不同粘度牌号的工业齿轮油、蜗轮蜗杆油和油膜轴承油中的应用结果,表明Ｔ６０１具有较强的稠化能力和抗剪切安定性能,适用于工业用油。     

黏度对润滑油密度测定准确性的影响

文章研究了使用U形振荡管测定润滑油密度时,黏度对密度测定准确性的影响。结果证明:经过黏度修正,润滑油的密度测定值更接近其真值,且玻璃密度计法与经过黏度修正的U形振荡管法的测定结果一致。因而,在润滑油密度测定有争议时,建议采用玻璃密度计法作为仲裁方法。     

影响测定润滑油运动粘度的因素

运动粘度是润滑油最重要的质量指标,也是选用润滑油的一项重要依据.分析了粘度计,温度控制,试样清洁度和试样量等因素对测定运动粘度的影响,只有严格控制测定条件才能保证测定的准确性.     

Stabilization of Heavy Vacuum Gas Oil when Producing Lubricating Oils

Chemistry and Technology of Fuels and Oils - A unit for separating heavy vacuum gas oil of a stabilized composition from a wide fraction of vacuum gas oil with a capacity of 65,000 tons per year is...