Process for the preparation of ionic liquids with alkyl sulfate and functionalized alkyl sulfate anions
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United States of America Patent
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Feb 2, 2010
Grant Date -
Mar 23, 2006
app pub date -
Oct 28, 2005
filing date -
Apr 29, 2003
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Abstract
The invention relates to a process for the preparation of ionic liquids of general formula (cation)(R'--O--SO.sub.3). The process includes the step of treating the compound of formula (cation)(R--O--SO.sub.3) with an alcohol, or mixture of different alcohols, of the formula R'--OH optionally in the presence of a catalyst to form the desired ionic liquid and the by-product R--OH, which is optionally removed during the reaction or after completion of the reaction. The compound of formula (cation)(R--O--SO.sub.3) can be prepared by alkylating a tertiary or aromatic amine with a dialkylsulfate.
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