Abstract
A novel carbonyl cobalt polyether functionalized ionic liquid, 1-methyl-3-polyetherimidazole cobalt tetracarbonyl ([CH3(OCH2CH2)8mim][Co(CO)4]), was prepared and characterized by FT-IR. Characteristic absorption peak were found near the 2879cm-1, 1114cm-1 and 1886cm-1, representing the presence of the polyether and [Co(CO)4]−anion structure. The ionic liquid was used as catalyst in alkoxycarbonylation of EO to produce 3-HMP. The effects of temperature, pressure of CO, reaction time and catalyst species on the reaction were studied and the optimal reaction conditions were obtained, that was, 75℃, 7.2Mpa and 12 h. The results showed that [CH3(OCH2CH2)8mim][Co(CO)4] had good activity for alkoxycarbonylation of EO with ethanol and CO. The conversion rate of EO and selectivity of 3-HMP reached to 91.36%and 85.19%, respectively. Not only the ionic liquid could be conveniently separated from the products, but also had good air-stability and reused directly without any treatment for over 10times, and the conversion rate and selectivity did not go down obviously.
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