Key words: oil sludge, propane, butane, supercritical fluid state, supercritical fluid extraction
The possibility of extracting petroleum products from oil sludges using liquid and
supercritical fluid extraction is studied. The initial content of water and solid residues
in the sludge sample was 30 and 5.9 wt. %, respectively. If the 3 : 1 (by weight) propanebutane
mixture is used as extragent at 85—120 °C and 10—15 MPa, the petroleum product
with substantially reduced viscosity and sulfur and water content can be obtained.
doi:10.1134/S1990793119070133