Extraction of bitumen oils (tar) from tar sands

Details Extraction of bitumen oils (tar) from tar sands Extraction of bitumen oils (tar) from tar sands

C - Chemistry, Metallurgy

10

G

196/17

C10G 1/04 (2006.01)

Patent

CA 1085761

ABSTRACT A continuous process for the recovery of bitumen oils from tar sand comprises contacting tar sand with hot water in a contacting zone comprising a plurality of volumes connected in series providing an upper layer comprising hot water and a lower layer comprising tar sand in each volume, passing tar sand and hot water in countercurrent through the volumes from one to another, repeatedly showering tar sand through the upper layer of hot water in each volume, recovering from a volume at one end of the series of volumes a liquid fraction rich in bitumen oils and from a volume at the other end of the series of volumes a slurry of sand that contains little or no bitumen oils. A froth suppression agent may be used and provision may be made for separating bitumen oils from the liquid fraction and for solvent extraction of the resulting aqueous fraction.

283972

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