Method for preparation of anhydrosugar ethers
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United States of America Patent
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Jun 10, 2014
Grant Date -
Oct 8, 2009
app pub date -
Mar 24, 2009
filing date -
Mar 24, 2008
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Abstract
A method for alkylation of an anhydrosugar compound in which a dialkyl carbonate is reacted with an anhydrosugar compound in the presence of a solid phase basic catalyst. A typical anhydrosugar compound is anhydrosugar alcohol, a dianhydromonoether and mixtures thereof. The reaction step uses zeolyte as the solid phase basic catalyst. The zeolite catalyst is typically a zeolite having ammonium groups. The reaction is carried out at a temperature below 240° C. and the reaction time is 2 hours or less.
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