Process and fluid media for treatment of tar sand to recover...

Details Process and fluid media for treatment of tar sand to recover... Process and fluid media for treatment of tar sand to recover...

C - Chemistry, Metallurgy

10

G

196/28

C10G 1/04 (2006.01)

Patent

CA 1074243

ABSTRACT Process, structure, and aqueous bath for recovering oil from tar sand, known also simply as oil sand. The process includes the steps of passing the tar sand through, or sub- jecting the same to a diluent, to reduce the internal fluid friction or viscosity of the oil layers surrounding each sand particle, and then bringing together the "sand", i.e. the sand particle plus its thinned oil layer, and an aqueous bath having a slightly raised specific gravity and also a wetting agent. The purpose for the wetting agent is to allow the sand particles to fall to the bottom of the processing tank as sludge. The raised specific gravity of the water, which is still substan- tially less than that of sea water, by the Archimedes' principle, causes the released globules or droplets of oil to be accelerated rapidly to the surface of the water, thereby escaping recapture or admixture with the descending sand particles. The now dilute oil is recovered, separated, and the diluent is reused in the tank. In-situ and bath recovery by the above process is likewise practicable.

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