Process for the recovery of cellulose carbamate
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United States of America Patent
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Jun 5, 2001
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N/A
app pub date -
Jun 2, 1998
filing date -
Sep 15, 1997
priority date (Note) -
Expired
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Abstract
The present invention comprises a process for the recovery from a reaction mixture of cellulose carbamate produced by conversion of cellulose with excess urea in an inert organic liquid reaction carrier, wherein the reaction mixture is treated with added water under heat, then the liquid phase is separated as much as possible on a filter, the cellulose carbamate remaining on the filter is washed with water, optionally pre-dried and, if desired, dried and recovered, and the organic reaction carrier is recovered by phase separation from the combined liquids.
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