Abstract

FONG SILVA, Waldyr; QUINONEZ BOLANOS, Edgar  and  TEJADA TOVAR, Candelaria. Physical-chemical caracterization of spent engine oils for its recycling. Prospect. [online]. 2017, vol.15, n.2, pp.135-144. ISSN 1692-8261.  https://doi.org/10.15665/rp.v15i2.782.

This paper presents the physical-chemical evaluation of used engine oils from samples taken from industries that are located in Mamonal industrial sector in Cartagena de Indias. Among the characteristics taken into consideration it can be found: density, humidity percentage, viscosity, metals in suspension and high calorific value; some of the used methods were: densimetry, Karl fischer, viscosimetry, and atomic absorption. It can be highlighted that the analyzed samples didn't report significant presence of tin, lead, chromium, silver and cadmium. The presence of calcium, magnesium, sodium, zinc and phosphorus can be due to additives added in order to improve their characteristics. The presence of chromium and iron in the samples is interpreted as a sign of wear in the parts. The presence of silicon can be provided by dust filtration. According to the above and proper treatment such oils are susceptible to recycle.

Keywords : Engine oils; Toxic liquid residues; Atomic absorption.

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