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      Binary Solvent Pretreatment, Adsorption and Definite Characterization of the Used Engine Lubricants.

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            Abstract

            Engine lubricants are viscous petrochemical products that are essentially formulated for the lubrication of moving parts in an engine. With the declining production of fossil oil reserves, the need to recycle used lubricating oils arises more than ever.

            Coincidentally, engine lubricant loses its properties and cannot be used as required. Hence, this paper comparatively studies the treatment effects of the three months used lubricating oil (5W-30) with a binary solvent mixture [(methanol (70%)/n-hexane (30%)] at a 5:1 solvent to oil mixing ratio with potassium hydroxide as a coagulant at 120 oC and solvent expulsion for 30 minutes. The last stage of clarification was achieved with the physical adsorption of analytical grade activated charcoal at 150 oC for 1 hour and centrifugation at 300 rpm for 1 hour, resulting in a reddish-transparent colored base oil. Eight selected physicochemical parameters (pH, specific gravity, dynamic viscosity, ash content, flash point, pour point, percentage water content, and metallic compositions) were evaluated with the fresh engine oil (FEO), three-month old engine oil (UEO), and the treated engine oil (TEO).

            The results obtained at 95% confidence levels with respect to the entire parameters were significantly justified with the treatment methods that generated 95.7% recovery. The approach has been demonstrated to be technically feasible, sustainable and ecologically friendly.

            Content

            Author and article information

            Journal
            ScienceOpen Preprints
            ScienceOpen
            9 February 2022
            Affiliations
            [1 ] Department of Industrial and Environmental Pollution, National Research Institute for Chemical Technology Zaria Kaduna State, Nigeria.
            [2 ] Department of Chemistry, Faculty of Natural Science, University of Jos, Jos Plateau State, Nigeria.
            [3 ] Department of Integrated Science, Kogi State College of Education (Technical), Kabba, Kogi State.
            [4 ] Department of Textile, National Research Institute for Chemical Technology Zaria Kaduna State, Nigeria.
            Author notes
            Article
            10.14293/S2199-1006.1.SOR-.PP9BWN5.v1
            ebd7361f-3277-4197-bb13-5adc2ebb687a

            This work has been published open access under Creative Commons Attribution License CC BY 4.0 , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Conditions, terms of use and publishing policy can be found at www.scienceopen.com .


            All data generated or analysed during this study are included in this published article (and its supplementary information files).
            Earth & Environmental sciences,Chemistry
            methanol,activated charcoal, n-hexane, physicochemical characteristics.,Engine lubricant

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