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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2012, Volume 63, Issue 6,





Elena-Emilia Oprescu, Emil Stepan, Paul Rosca, Adrian Radu, Cristina-Emanuela Enascuta
Synthesis of Glycerol Carbonate over Hydrotalcite Catalyst

Abstract:

Glycerol carbonate is a multifunctional compound usable as solvent, additive, monomer, and chemical intermediate. In this work we have studied the possibility of preparing glycerol carbonate in high yields and selectivity. The synthesis is based on glycerine carbonylation with urea in the presence of a heterogeneous Zn-Al-HTC. Zinc-aluminium hydrotalcite like compound (Zn-Al-SO4) with a molar ratio of 3, containing sulphate anion, was synthesized at room temperature by the co-precipitation method. The catalyst was characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, inductively coupled plasma atomic emission spectroscopy and elemental analysis. The surface acidity was measured by thermogravimetric analysis of adsorbed n-butylamine. To determinate the optimal parameters, we investigate the influence of the reaction temperature, reaction time, the molar ratio of glycerol to urea and amount of catalyst. Synthesized glycerol carbonate was analyzed by GC-MS/MS. Keywords: glycerol valorization, glycerol carbonate, hydrotalcites, urea


Issue: 2012, Volume 63, Issue 6
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