Method for extracting nylon from waste materials
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United States of America Patent
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Jun 23, 2009
Grant Date -
Feb 16, 2006
app pub date -
Aug 5, 2005
filing date -
May 10, 2001
priority date (Note) -
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Abstract
The invention relates to a method for recovering nylon from a nylon-containing material by contacting the nylon-containing material with an alkanol-containing solvent at elevated temperature and at a pressure higher than the equilibrium pressure of the alkanol-containing solvent at the elevated temperature, thereby dissolving the nylon in the alkanol-containing solvent, removing the alkanol-containing solvent containing dissolved nylon from any undissolved solids, and decreasing the temperature of the alkanol-containing solvent containing dissolved nylon to precipitate the dissolved nylon.
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