Epoxidation of Unsaturated Fatty Acid Methyl Esters in the Presence of SO3H-functional Brφnsted Acidic Ionic Liquid as Catalyst

Abstract

Abstract: The epoxidation of unsaturated fatty acid methyl esters(FAMEs)by peroxyacetic acid generated in situ from hydrogen peroxide and acetic acid was studied in the presence of SO₃H-functional Brnsted acidic ionic liquid (IL)[C₃SO₃HMIM][HSO₄] as catalyst.The effects of hydrogen peroxide/ethylenic unsaturation ratio,acetic acid concentration,IL concentration,recycling of the IL catalyst,and temperature on the conversion to oxirane were studied.The kinetics and thermodynamics of unsaturated FAMEs epoxidation and the kinetics of oxirane cleavage of the epoxidized FAMEs by acetic acid were also studied.The conversion of ethylenic unsaturation group to oxirane, the reaction rate of the conversion to oxirane,and the rate of hydrolysis(oxirane cleavage)were higher by using the IL catalyst.

Key words: in situ epoxidation, kinetics, oxirane cleavage, unsaturated fatty acid methyl esters, Brφnsted acidic ionic liquids

摘要： The epoxidation of unsaturated fatty acid methyl esters(FAMEs)by peroxyacetic acid generated in situ from hydrogen peroxide and acetic acid was studied in the presence of SO₃H-functional Brnsted acidic ionic liquid (IL)[C₃SO₃HMIM][HSO₄] as catalyst.The effects of hydrogen peroxide/ethylenic unsaturation ratio,acetic acid concentration,IL concentration,recycling of the IL catalyst,and temperature on the conversion to oxirane were studied.The kinetics and thermodynamics of unsaturated FAMEs epoxidation and the kinetics of oxirane cleavage of the epoxidized FAMEs by acetic acid were also studied.The conversion of ethylenic unsaturation group to oxirane, the reaction rate of the conversion to oxirane,and the rate of hydrolysis(oxirane cleavage)were higher by using the IL catalyst.

关键词: in situ epoxidation, kinetics, oxirane cleavage, unsaturated fatty acid methyl esters, Brφnsted acidic ionic liquids

CAI Shuangfei, WANG Lisheng. Epoxidation of Unsaturated Fatty Acid Methyl Esters in the Presence of SO₃H-functional Brφnsted Acidic Ionic Liquid as Catalyst[J]. , 2011, 19(1): 57-63.

蔡双飞, 王利生. Epoxidation of Unsaturated Fatty Acid Methyl Esters in the Presence of SO₃H-functional Brφnsted Acidic Ionic Liquid as Catalyst[J]. CIESC Journal, 2011, 19(1): 57-63.

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Epoxidation of Unsaturated Fatty Acid Methyl Esters in the Presence of SO₃H-functional Brφnsted Acidic Ionic Liquid as Catalyst

Epoxidation of Unsaturated Fatty Acid Methyl Esters in the Presence of SO₃H-functional Brφnsted Acidic Ionic Liquid as Catalyst

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