Key words: extraction, propane, butane, oil sludge, supercritical fluid, kinetics
The extraction by the mixture of propane and butane (3 : 1 by weight) in liquid and
supercritical fluid state at 85—160 °C and 5—50 MPa is used to obtain an oil-like product
from dehydrated oil sludge containing 12.05% wt. of solid particulates. The extracted
product contains 2.8% wt. sulfur; at 20 °C its kinematic viscosity is 73.75 mm2/s,
density — 80 kg/m3; the initial and final boiling temperatures are 43.6 and 325 °C,
respectively. The data on the kinetics of the extractant desorption from the extract are
presented.
doi:10.1134/S1990793117070090