Waste lubricating oil rerefining by extraction-flocculation. 1. A scientific basis to design efficient solvents

Journal Article · Fri Jul 01 00:00:00 EDT 1988 · Ind. Eng. Chem. Res.; (United States)

DOI:https://doi.org/10.1021/ie00079a023· OSTI ID:6632287

dos Reis, M A; Jeronimo, M S ^[1]

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1. Faculdade de Engenharia, Departamento de Engenharia Quimica, Rua dos Bragas, 4099 Porto Codex (PT)

Waste motor oils may be refined by treatment with a solvent that dissolves the base oil and flocculates some of the additives and impurities. This paper compares the performance of ketones and alcohols that are miscible with base oils at room temperature. The results indicate that the flocculating action of polar solvents in waste oils is, basically, an antisolvent effect exerted on some nonpolar macromolecules. In this context, it has been shown that the difference vertical bardelta/sub 1/ - delta/sub 2/vertical bar between the solubility parameters of the solvent and of a typical polyolefin (polyisobutylene) may be correlated with sludge removal from waste oils and thus be used as a preliminary criterion to select the components of composite solvents. In some cases the polar event induces the formation of an electrically stabilized dispersion. The addition of potassium hydroxide in alcoholic solution easily destabilizes the dispersion and increases sludge removal from waste oils.

• OSTI ID: 6632287
• Journal Information: Ind. Eng. Chem. Res.; (United States), Vol. 27:7
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
10 SYNTHETIC FUELS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALCOHOLS
CHEMICAL PROPERTIES
ALKENES
SOLVENT EXTRACTION
KETONES
WASTE OIL REFINERIES
TECHNOLOGY ASSESSMENT
FLOCCULATION
POTASSIUM HYDROXIDES
SOLUBILITY
ALKALI METAL COMPOUNDS
EXTRACTION
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
INDUSTRIAL PLANTS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
PRECIPITATION
SEPARATION PROCESSES
WASTE PROCESSING PLANTS
020400* - Petroleum- Processing
020800 - Petroleum- Waste Management
090210 - Alcohol Fuels- Properties- (1976-1989)
400105 - Separation Procedures