C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/27
C10G 1/04 (2006.01) B01D 11/02 (2006.01) B01D 11/00 (2006.01)
Patent
CA 1101350
ABSTRACT OF THE DISCLOSURE SOLVENT EXTRACTION PROCESS A method is disclosed for solvent-extracting an extractable component from a mixture including the extractable component and sub- divided solids, comprising: (a) maintaining a vertically extending bed comprising the solids in an extraction zone and introducing the mixture into an upper portion of the bed; (b) introducing a vapor- izable liquid solvent into the upper portion of the bed; (c) providing a substantially continuous gaseous phase in contact with a lower portion of the bed; (d) maintaining a substantially continuous liquid phase comprising the solvent in contact with the upper por- tion of the bed above the gaseous phase, the liquid phase and gaseous phase having an interface at a vertically intermediate level, extracting the extractable component from the mixture by passing the solvent through the upper portion of the bed, and removing a liquid stream including the solvent and the extractable component from the extraction zone; (e) preventing the liquid phase from flowing downwardly through the lower portion of the bed by maintaining the gaseous phase at a pressure sufficient to support the liquid phase thereon, and vaporizing liquid adhering to solids in the lower por- tion of the bed; and (f) removing the solids from the lower portion of the bed.
307513
Chevron Research And Technology Company
Smart & Biggar
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