Method of producing cellulose polymers
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United States of America Patent
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Jul 29, 2003
Grant Date -
Oct 18, 2001
app pub date -
Feb 20, 2001
filing date -
Feb 18, 2000
priority date (Note) -
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Abstract
A method of making cellulose polymer solution comprises dissolving a cellulose polymer raw material in a chlorine-free organic solvent system under a high temperature and a high pressure condition belonging to the nearcritical or the supercritical region of the system. By removing the solvent from the thus obtained cellulose polymer solution, cellulose polymer powders are also produced.
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