Cycloaddition of carbon dioxide to epichlorohydrin using ionic liquid as a catalyst |
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Authors: | Eun-Ha Lee So-Wan Cha Manju Mamparambath Dharma Youngson Choe Ji-Yun Ahn Dae-Won Park |
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Affiliation: | (1) Division of Chemical Engineering, Pusan National University, Busan, 609-735, Korea;(2) Korea Minjok Leadership Academy, Heyongseong-gun, Kangwon-do, 225-823, Korea |
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Abstract: | The cycloaddition of carbon dioxide to epichlorohydrin was performed without any solvent in the presence of ionic liquid as
catalyst. 1-Alkyl-3-methyl imidazolium salts of different alkyl group (C2, C4, C6, C8) and anions (Cl−, BF4−, Br−, PF6−) were used for this reaction carried out in a batch autoclave reactor. The conversion of epichlorohydrin was affected by
the structure of the imidazolium salt ionic liquid; the one with the cation of longer alkyl chain length and with more nucleophilic
anion showed better reactivity. The conversion of epichlorohydrin increased as the temperature increased from 60°C to 140°C.
It also increased with increasing carbon dioxide pressure probably due to the increase of the absorption of carbon dioxide
into the mixture of epichlorohydrin and the ionic liquid. Zinc bromide was also tested for its use as a cocatalyst in this
reaction.
This work was presented at the 6
th
Korea-China Workshop on Clean Energy Technology held at Busan, Korea, July 4–7, 2006. |
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Keywords: | Cycloaddition Epichlorohydrin Ionic Liquid Carbon Dioxide |
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