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Recycling of lubricating oils used in gasoline/alcohol engines

Thermal characterization

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Abstract

Lubricating oils are complex mixtures of hydrocarbons obtained from petroleum by refining process and represent 2% of petroleum derivatives. The used lubricating oil is an important raw material for re-refining, because during its use it is not completely degraded, so it can be recovered from it, the base oil, which can be reused for the same purpose. Mineral-based lubricating oils were used for this work. It worked with two engines using the same type of oil; one of them was monitored during approximately 5000 km and the other one for 10,000 km. The base oil was then recovered from the lubricant using polar organic solvents (1-butanol, 2-propanol and methyl-ethyl-ketone) and then characterized by physicochemical analysis and thermal analysis (TG/DTG/DTA). From the solvents used in the extraction of the base oil, the best yields were methyl-ethyl-ketone, about 80% and 1-butanol, just above 70%. Already with 2-propanol, it was not satisfactory. The method used for the recovery of waste oils proved to be feasible and, the thermal analysis techniques evidenced the viability of this process.

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Authors and Affiliations

  1. Unidade Acadêmica de Biologia e Química, Federal University of Campina Grande, UFCG, Cuité, Paraíba, Brazil

    J. C. O. Santos

  2. Departamento de Ciências Agrárias, Federal University of Paraiba, UFPB, Bananeiras, Paraíba, Brazil

    R. A. Almeida

  3. Unidade Acadêmica de Engenharia Química, Federal University of Campina Grande, UFCG, Campina Grande, Paraíba, Brazil

    M. W. N. C. Carvalho

  4. Departamento de Química, Federal University of Paraiba, UFPB, João Pessoa, Paraíba, Brazil

    A. E. A. Lima & A. G. Souza

Authors
  1. J. C. O. Santos
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  2. R. A. Almeida
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  3. M. W. N. C. Carvalho
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  4. A. E. A. Lima
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  5. A. G. Souza
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Correspondence to J. C. O. Santos.

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Santos, J.C.O., Almeida, R.A., Carvalho, M.W.N.C. et al. Recycling of lubricating oils used in gasoline/alcohol engines. J Therm Anal Calorim 137, 1463–1470 (2019). https://doi.org/10.1007/s10973-018-7976-2

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  • DOI: https://doi.org/10.1007/s10973-018-7976-2

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