Homogeneous synthesis of cellulose ethers in ionic liquids
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United States of America Patent
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Sep 24, 2013
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Sep 3, 2009
app pub date -
Feb 25, 2009
filing date -
Mar 3, 2008
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Abstract
The invention is directed to a simple and new method for the homogeneous synthesis of cellulose ethers. Ionic liquids are not only used as solvent, but also as reaction media for the homogeneous etherification of cellulose. The dissolved cellulose is treated with the etherification agent in the absence of organic and/or inorganic bases and in the absence and/or in the presence of moderate amounts of water. The obtained cellulose ethers show new distributions of substitution on the polymer chain, resulting in new properties and applications.
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