Process and fluid media for treatment of tar sands to recover oi

Details Process and fluid media for treatment of tar sands to recover oi Process and fluid media for treatment of tar sands to recover oi

1975-09-18

1977-04-12

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

C10G 104

Patent

active

040173771

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 subjecting 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 substantially 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 recovery by the above process and bath is likewise practicable.

REFERENCES:
patent: 2825677 (1958-03-01), Conlson
patent: 2903407 (1959-09-01), Fischer et al.
patent: 3300405 (1967-01-01), Black
patent: 3547803 (1970-12-01), Barkman et al.
patent: 3553100 (1971-01-01), Jorda et al.
patent: 3644194 (1972-02-01), Kelly et al.
patent: 3660268 (1972-05-01), Kelly et al.

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