Method of making a cellulose food casing including solvent recovery
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United States of America Patent
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Aug 24, 1999
Grant Date -
N/A
app pub date -
Aug 12, 1997
filing date -
Aug 12, 1997
priority date (Note) -
Expired
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Abstract
Disclosed is a method of extruding a solution of cellulose and an amine oxide cellulose solvent as a tube about a sizing mandrel which diametrically stretches the extruded tube. An aqueous poly(ethylene oxide) solution is introduced into the interior of the extruded tube to facilitate passage of the tube over the sizing mandrel and to extract the amine oxide cellulose solvent from the tube. After such extraction, the aqueous poly(ethylene oxide) solution containing the extracted amine oxide cellulose solvent is contacted with an anion exchanger to remove the poly(ethylene oxide) so the amine oxide cellulose solvent can be recovered.
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