PROCESS FOR RECOVERING SOLVENT FROM OIL SAND TAILINGS STREAMS

摘要

A method comprising providing a tailings stream comprising solvent, precipitated asphaltenes, mineral solids, residual maltenes, and water; and recovering a portion of the solvent from the tailings stream by vaporization in a viscous fluid evaporator or particulate solid desolventizer to produce desolventized tailings and a recovered solvent stream.