Method of removing alkylene halogenohydrin from cellulose ether
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United States of America Patent
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Oct 13, 2015
Grant Date -
May 29, 2014
app pub date -
Jul 17, 2012
filing date -
Jul 27, 2011
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Abstract
In a method of removing alkylene halogenohydrin from a cellulose ether the cellulose ether is provided, water is added to the cellulose ether and subsequently alkylene halogenohydrin and water is removed from the cellulose ether by evaporation. Alternatively steam or a steam mixture can be sparged across or through the cellulose ether to remove halogenohydrin from the cellulose ether.
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