Three alkaline earth metal isethionates, Ca(HOCH2CH2SO3)2·2H2O, Sr(HOCH2CH2SO3)2·2H2O, and Ba(HOCH2CH2SO3)2, have been synthesized by the reaction of isethionic acid (HOCH2CH2SO3H, ITA) with corresponding alkaline earth metal carbonates. β-mercaptoethanol and hydrogen peroxide were used as raw materials to synthesize ITA. Thermal decomposition processes of these alkaline earth metal isethionates in air atmosphere are investigated in detail by thermogravimetry. TG analysis shows that thermal decomposition products are the corresponding sulfate salts, which are confirmed by X-ray diffraction results. Nuclear magnetic resonance (NMR) and Fourier transform infrared techniques are used to determine the chemical structure of M(HOCH2CH2SO3)2·xH2O (M = Ca, Sr, Ba). The melting points and ∆H fus are ascertained by differential scanning calorimetry studies.
Research on Chemical Intermediates – Springer Journals
Published: Dec 5, 2013
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