Device for desolventising under reduced pressure
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United States of America Patent
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Mar 27, 2012
Grant Date -
Feb 5, 2009
app pub date -
Jul 18, 2008
filing date -
Aug 1, 2007
priority date (Note) -
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Abstract
The invention provides a continuous process for removing organic solvents from a marc including the steps of: continuously introducing the marc into a desolventiser; introducing an inert, gaseous stripping medium into the desolventiser; removing the organic solvents from the marc by maintaining a sub-atmospheric pressure inside the desolventiser, thus providing an organic solvent-desolventised material; and continuously extracting the organic solvent-desolventised material from the desolventiser; wherein step (a) and (d) comprise compacting the marc and the organic solvent-desolventised material into a first and second plastic, substantially gas-impermeable mass respectively and extruding the first and second plastic mass through an annular gap, the opening of which is controlled by the rate of supply of the first and second plastic mass. The invention also provides a device for compacting a moist organic material into a first plastic gas-impermeable mass which is useful for implementing this process.
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