B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 11/02 (2006.01) B03B 9/02 (2006.01)
Patent
CA 2098656
ABSTRACT OF THE DISCLOSURE An extractor in which material to be extracted is caused to move by a screw conveyor within a housing or trough in counter current to an extracting liquid (extractant). The motion of the screw conveyor is intermittently reversible, and the gentle agitation of the raw material with the extracting liquid causes material to be extracted to separate from the raw material and moved with the extactant to a liquids outlet. The housing is pressurized and the process of the invention run at elevated pressure. Extractant is injected into the raw material using jets on the screw conveyor. A strainer at the liquids outlet is charged with fine particulates as a filter medium. The housing is enlarged to assist in gas removal from the housing. Extracted liquids are processed in a like extractor to remove additional fine material, and extracted solids additionally processed to remove further liquids from the solid material.
Lambert Anthony R.
Smith Peter W.
LandOfFree
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