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<p>Liquid phase dehydration of sorbitol in a solvent-free environment is carried out to examine catalytic activities of sulfated tin oxides (STO) and STO/Hβ catalysts. The catalysts were prepared by wet impregnation method and characterized by XRD, FTIR, TEM, N<sub>2</sub> physisorption, NH<sub>3</sub>-TPD. Prepared catalysts were examined at different temperatures and various catalysts loading. Under optimized reaction conditions (temperature −220&#xa0;°C, reaction time −3&#xa0;h), both STO and STO/Hβ catalysts demonstrated complete conversion of sorbitol, achieving isosorbide selectivity of 66% and 87%, respectively. This may be due to higher surface area and high Bronsted acid sites of catalysts. Catalyst reusability was checked for 4 cycles and it was found that conversion remains intact and only minor change in selectivity of isosorbide was observed.</p>

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Selective double dehydration of sorbitol to isosorbide using sulfated SnO2 and sulfated SnO2/Hβ as heterogeneous catalyst

  • 期刊论文

  • 发表日期：

    2025年2月22日

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  • Jay B. Trivedi,
  • Paresh H. Rana

摘要

Liquid phase dehydration of sorbitol in a solvent-free environment is carried out to examine catalytic activities of sulfated tin oxides (STO) and STO/Hβ catalysts. The catalysts were prepared by wet impregnation method and characterized by XRD, FTIR, TEM, N2 physisorption, NH3-TPD. Prepared catalysts were examined at different temperatures and various catalysts loading. Under optimized reaction conditions (temperature −220 °C, reaction time −3 h), both STO and STO/Hβ catalysts demonstrated complete conversion of sorbitol, achieving isosorbide selectivity of 66% and 87%, respectively. This may be due to higher surface area and high Bronsted acid sites of catalysts. Catalyst reusability was checked for 4 cycles and it was found that conversion remains intact and only minor change in selectivity of isosorbide was observed.