Method for stripping of residual solvent

Details Method for stripping of residual solvent Method for stripping of residual solvent

C - Chemistry, Metallurgy

10

G

196/29

C10G 1/04 (2006.01)

Patent

CA 1241926

ABSTRACT A method for stripping adsorbed organic solvent from a solid comprising feeding a slurry of the solid con- taining the adsorbed solvent into a packed column and countercurrently contacting the slurry with stripping gas, removing an overhead stream comprising desorbed sol- vent and a bottom stream comprising a solvent stripped solids slurry. A preferred embodiment uses a vertical packed column, an aqueous slurry of the solid, and steam as the stripping gas. The method is particularly sui- table for stripping extraction solvents from spent tar sands or spent diatomite resulting from bitumen extrac- tion methods. *

477735

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