Apparatus and methods for removing solvent residues
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United States of America Patent
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Jan 13, 2004
Grant Date -
Dec 26, 2002
app pub date -
Feb 27, 2002
filing date -
Sep 6, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus (10') for extracting biomass includes an extractor (11), evaporator (12), compressor (13) and condenser (14) connected in series by pipework (17) to define a closed loop extraction circuit. A transfer line (18) selectively supplies hot solvent vapor from the outlet side of the compressor (13) to the interior of the extractor (11), where the solvent vapor heats the biomass. This causes stripping of solvent from the biomass. The transfer line (18) includes control elements (19,20) for controlling the flow of solvent vapor.
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