Cellulose esters and their production in halogenated ionic liquids
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United States of America Patent
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Apr 17, 2012
Grant Date -
Aug 13, 2009
app pub date -
Aug 11, 2008
filing date -
Feb 13, 2008
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Expired
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Abstract
Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by esterifying cellulose in a reaction medium comprising one or more halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.
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