Removal of contaminants from materials
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United States of America Patent
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Nov 6, 2001
Grant Date -
N/A
app pub date -
Feb 27, 1998
filing date -
Mar 6, 1997
priority date (Note) -
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Abstract
An improved approach for cleaning and recycling materials is based on pressurized solvents including liquid propane, butane, dimethyl ether, and supercritical carbon dioxide. The approaches are particularly suitable for cleaning sorbent materials. The approach allows for recycling of the sorbent materials, the solvent and the contaminents, typically oils and the like.
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