1
Willem P C Duyvesteyn, Julia Rose Budden, Merijn Amilcare Picavet: Extraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sands. BHP Minerals International, Hopgood Calimafde Kalil & Judlowe, October 19, 1999: US05968349 (370 worldwide citation)

A process for the extraction of bitumen from bitumen froth generated from tar sands is disclosed. In this process, bitumen froth is extracted from tar sands using a water process without requiring the use of caustic soda. The froth is treated in a counter-current decantation circuit with a paraffini ...


2
Willem P C Duyvesteyn, Julia Rose Budden, Bernardus Josephus Huls: Biochemical treatment of bitumen froth tailings. BHP Minerals International, Hopgood Calimafde Kalil & Judlowe, June 13, 2000: US06074558 (45 worldwide citation)

A process for the biological treatment of bitumen froth tailings produced from a tar sands treatment and bitumen froth extraction process is disclosed. In this process bitumen froth tailings, containing native hydrocarbon metabolizing microorganisms, are mixed with a growth media to form an inoculum ...