Solvent extraction spherical agglomeration of oil sands

Details Solvent extraction spherical agglomeration of oil sands Solvent extraction spherical agglomeration of oil sands

1986-06-04

1988-01-12

Pal, Asok

Mineral oils: processes and products

Tar sand treatment with liquid

208391, C10G 104

Patent

active

047190086

ABSTRACT:
Oil sands and similar hydrocarbon-solids mixtures are separated into their components by steps comprising: mixing with a solvent for the hydrocarbon in an extraction-contacting stage including a controlled light milling action, in the presence of hydrophilic bridging liquid, under selected conditions favoring the formation of large agglomerates of substantially all hydrophilic solids; controlling the milling action to break down continuously the agglomerates so that at equilibrium the agglomerate size is much smaller than expected; separating the agglomerates from the concentrated hydrocarbon solution and stripping solvent from this solution to leave hydrocarbon product; washing the agglomerates with solvent and recycling this dilute wash solution preferably to the extraction-contacting; desolventizing the agglomerates and recycling solvent preferably to the wash stage. The agglomerates have fast settling and draining properties and a low hydrocarbon content while the hydrocarbon product has a low solids content. An apparatus for carrying out this process is described.

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Sanford, Canadian J. Chem. Eng., 61, (1983) pp. 554-567.

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