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GreenSunday

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[资源] Novel Brønsted acidic ionic liquid as efficient and reusable

一篇有关硫酸氢根离子液制备及在酯化反应应用的文献，很不错。
Novel Brønsted acidic ionic liquid as efficient and reusable catalyst system for esterification

Abstract
Under mild conditions and without any additional organicsolvent,esterification of alcohols by carboxylic acids could be carriedout in three new halogen-free Brønsted acidic ionic liquids, 1-(4-sulfonic acid) butyl-3-methylimidazolium hydrogen sulfate, 1-(4-sulfonic acid) butylpyridinium hydrogen sulfate and N-(4-sulfonic acid)butyl triethylammonium hydrogen sulfate. Especially for esterification of ethanol by acetic acid, good conversion rate and high selectivity were obtained, and the liquid esters formed a separate phase that was decanted. The ionic liquid could be reused after removal of water under vacuum.

[ Last edited by wxwdoctor on 2007-3-25 at 20:04 ]

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