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Effects of reflux ratio, water addition and content of water in ethanol on the purity and yield of tantalum ethoxide during vacuum distillation were investigated under the operational conditions of pressure of 1 kPa, oil bath temperature of 210–230 °C, and outlet temperature of 190 °C. The condensate sample was characterized by FTIR, 1 H-NMR spectroscopy and Raman spectra, respectively. The...