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The effect of alkoxide ionic liquids on the synthesis of dimethyl carbonate from CO.sub.2 and methanol over ZrO.sub.2-MgO
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The effect of alkoxide ionic liquids on the synthesis of dimethyl carbonate from CO.sub.2 and methanol over ZrO.sub.2-MgO
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The effect of alkoxide ionic liquids on the synthesis of dimethyl carbonate from CO.sub.2 and methanol over ZrO.sub.2-MgO
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Journal Article
The effect of alkoxide ionic liquids on the synthesis of dimethyl carbonate from CO.sub.2 and methanol over ZrO.sub.2-MgO
2011
Overview
The use of carbon dioxide in the synthesis of chemicals, such as dimethyl carbonate (DMC), constitutes an environmentally attractive alternative to hazardous and toxic reagents. However, the direct synthesis of DMC from methanol and C[O.sub.2] is characterized by low yields due to the reaction equilibrium and the thermodynamic limitations ([DELTA][G.sup.o.sub.298K] = +26.3kJ/mol). Alkoxide ionic liquids possessing alkylimidazolium and benzalkonium cations were prepared, characterised and tested together with Zr[O.sub.2]MgO catalyst for the synthesis of DMC from methanol and C[O.sub.2]. By using the novel ionic liquid as additives, ca. 12% conversion of methanol, and 90% selectivity to DMC was obtained at 120 [degrees]C and 7.5 MPa. The water abstracting potential of the ionic liquids influenced the conversion of methanol and the selectivity to DMC. The alkoxide ionic liquids were recovered and reused in DMC synthesis without loss in activity and selectivity.
Publisher
Springer
Subject
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