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首页> 外文期刊>The Journal of Supercritical Fluids >Regeneration of used lubricant oil by ethane extraction
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Regeneration of used lubricant oil by ethane extraction

机译：通过乙烷萃取再生废润滑油

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Liquid and supercritical ethane has been used as a solvent for the recycling Of used lubricant oils. The aim of the work has been to identify the best processing conditions to separate base oil suitable for the formulation of new lubricants, avoiding the coextraction of oxidation products and metallic compounds. The effect of pressure (40-145 kg/cm(2)) and temperature (25-95 degrees C) on the separation efficiency and yields has been investigated. In the pressure range analyzed no effect on metallic compounds removal was found. However, it did affect the extraction yields (they increased with pressure) and the separation of oxidation products (removed more efficiently at low pressures). As regards to temperature, at a given pressure the extraction yields were found to be independent of the variable as long as ethane remained as a liquid, but they decreased with increasing temperature with supercritical ethane. As expected. gas ethane could not dissolve base oil at all. On the other hand, at constant pressure metallic and oxidation compounds removal increased as temperature was increased. (C) 2006 Elsevier B.V. All rights reserved.
机译：液体和超临界乙烷已用作回收废润滑油的溶剂。这项工作的目的是确定最佳的加工条件，以分离出适合配制新润滑剂的基础油，从而避免氧化产物和金属化合物的共萃取。研究了压力（40-145 kg / cm（2））和温度（25-95摄氏度）对分离效率和产率的影响。在所分析的压力范围内，未发现对金属化合物去除的影响。但是，它确实影响了萃取率（随压力增加）和氧化产物的分离（在低压下更有效地去除）。关于温度，发现在给定压力下，只要乙烷保持为液态，萃取率就不受变量影响，但是随着超临界乙烷的升高，萃取率会降低。如预期的那样。瓦斯乙烷根本无法溶解基础油。另一方面，在恒定压力下，金属和氧化物的去除率随温度的升高而增加。 （C）2006 Elsevier B.V.保留所有权利。

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