Statistical Model for Re-Refining of Used Lubricating Oil by Solvent Extraction and Bentonite Clay Adsorption Method

Activated Bentonits of Sulfatic Acid as Adsorben in Purchase of Used Lubricants Recycling of used lubricating oil is one of the alternatives in the framework of efficiency, saving oil consumption, and reducing pollution. One effort to purify used lubricating oil is to separate impurities through the adsorption method. The adsorbent that can be used is bentonite. Activation of bentonite using acid will produce adsorbent with an active side and greater surface acidity so that the adsorption ability is higher than before activated. Characteristics of lubricating oil produced are: kinematic viscosity 40 °C and 100 °C at 109.94 cSt and 14.57 cSt recently; viscosity index is 136; specific gravity 15 °C is 0.8872; and the resulting color is L5.0. Activated sulfonic bentonite can be an optimum adsorbent in purifying used lubricating oil, with optimum bentonite concentration is 30% and optimum adsorption temperature is 70 °C resulting in a 49% increase in viscosity efficiency of 40 °C and 30.79% for temperatures of 100 °C.Keywords: Bentonite, Lubricants, Adsorption ABSTRAK Daur ulang minyak pelumas bekas merupakan salah satu alternatif dalam rangka efisiensi, penghematan konsumsi minyak bumi, serta mengurangi pencemaran. Salah satu upaya menjernihkan minyak pelumas bekas adalah dengan memisahkan zat-zat pengotor melalui metode adsorpsi. Adsorben yang dapat digunakan adalah bentonit. Aktivasi bentonit menggunakan asam akan menghasilkan adsorben dengan sisi aktif dan keasaman permukaan yang lebih besar sehingga kemampuan adsorpsinya lebih tinggi dibandingkan dengan sebelum diaktivasi. Karakteristik minyak pelumas yang dihasilkan yaitu: viskositas kinematik 40 °C dan 100 °C sebesar 109,94 cSt dan 14,57 cSt secara berturut-turut; indeks viskositas sebesar 136; specific gravity 15 °C sebesar 0,8872; serta warna yang dihasilkan adalah L5,0. Bentonit teraktivasi asam sulfat mampu menjadi adsorben yang optimum dalam pemurnian minyak pelumas bekas, dengan konsentrasi bentonit optimum adalah 30% dan suhu adsorpsi optimum adalah 70 °C menghasilkan % efisiensi kenaikan viskositas sebesar 49,15% untuk suhu 40 °C dan 30,79% untuk suhu 100 °C.Kata kunci : adsorpsi, bentonit, pelumas

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Feasibility of Department of Defense Used Lubricating Oil Re-refining.

10.21236/ada136641 ◽

1983 ◽

Author(s):

J. Kubarewicz ◽

T. Shea ◽

W. J. Mikucki

Keyword(s):

Department Of Defense ◽

Lubricating Oil ◽

Used Lubricating Oil

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Biodegradation of Used Motor Oil in Soil Using Organic Waste Amendments

Biotechnology Research International ◽

10.1155/2012/587041 ◽

2012 ◽

Vol 2012 ◽

pp. 1-8 ◽

Cited By ~ 43

Author(s):

O. P. Abioye ◽

P. Agamuthu ◽

A. R. Abdul Aziz

Keyword(s):

Contaminated Soil ◽

Oil Pollution ◽

Green Technology ◽

Lubricating Oil ◽

Soil Bioremediation ◽

Order Kinetic ◽

Human Beings ◽

Mushroom Compost ◽

Oil Biodegradation ◽

Used Lubricating Oil

Soil and surface water contamination by used lubricating oil is a common occurrence in most developing countries. This has been shown to have harmful effects on the environment and human beings at large. Bioremediation can be an alternative green technology for remediation of such hydrocarbon-contaminated soil. Bioremediation of soil contaminated with 5% and 15% (w/w) used lubricating oil and amended with 10% brewery spent grain (BSG), banana skin (BS), and spent mushroom compost (SMC) was studied for a period of 84 days, under laboratory condition. At the end of 84 days, the highest percentage of oil biodegradation (92%) was recorded in soil contaminated with 5% used lubricating oil and amended with BSG, while only 55% of oil biodegradation was recorded in soil contaminated with 15% used lubricating oil and amended with BSG. Results of first-order kinetic model to determine the rate of biodegradation of used lubricating oil revealed that soil amended with BSG recorded the highest rate of oil biodegradation (0.4361 day−1) in 5% oil pollution, while BS amended soil recorded the highest rate of oil biodegradation (0.0556 day−1) in 15% oil pollution. The results of this study demonstrated the potential of BSG as a good substrate for enhanced remediation of hydrocarbon contaminated soil at low pollution concentration.

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Regeneration of Spent Lubricant Refining Clays by Solvent Extraction

International Journal of Chemical Engineering ◽

10.1155/2015/207095 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 6

Author(s):

Yan-zhen Wang ◽

Hai-long Xu ◽

Li Gao ◽

Meng-meng Yan ◽

Hong-ling Duan ◽

...

Keyword(s):

Solvent Extraction ◽

Petroleum Ether ◽

Oil Recovery ◽

Oil Refining ◽

Lubricating Oil ◽

Polar Solvents ◽

Base Oil ◽

Nonpolar Solvents ◽

Total Oil ◽

Storage Times

Step-by-step solvent extraction was used to regenerate spent clay by recovering the adsorbed oil in lubricating oil refining clay. Several polar and nonpolar solvents were tested, and petroleum ether (90–120°C) and ethanol (95 v%) were selected as the nonpolar and polar solvents, respectively. The spent clay was first extracted using petroleum ether (90–120°C) to obtain ideal oil and then extracted with a mixed solvent of petroleum ether (90–120°C) and ethanol (95 v%) two or three times to obtain nonideal oil before being extracted with ethanol and water. Finally, the clay was dried at 130°C to obtain regenerated clay. The total oil recovery can be more than 99 wt% of the adsorbed oil. The recovered ideal oil can be used as lubricating base oil. Shorter storage times for spent clay produce better regeneration results. The regenerated clay can be reused to refine the lubricating base oils.

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