GBA Extraction of bitumen from oil sands Google ...
Prior to the extraction of bitumen oils from oilsands 2, the oil sands are treated at 4 with cold water 6 at a temperature of less than 30 DEG C to separate clay fines as a dispersion 8 of clay in water, the remaining oilsands are thereafter treated at 10 with water 12 at a temperature exceeding 60 DEG C. to free the bitumen from the sand.