Method for the purification and recovery of non-gelatin colloidal waste encapsulation materials
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United States of America Patent
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Apr 27, 2004
Grant Date -
Mar 14, 2002
app pub date -
Sep 4, 2001
filing date -
Mar 3, 1998
priority date (Note) -
Expired
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Abstract
Method for treating non-gelatin colloidal encapsulation waste materials in which the waste is combined, optionally, with a solvent capable of dissolving the non-gelatin colloidal encapsulation material, and any softening agent contained therein, and then treating the solvent layer to remove contaminants such as residual oils and/or particulates which may be present, to provide a purified and usable encapsulating material containing stream.
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