Scholarlink

<p>This study investigates the direct methoxylation of renewable terpenes, <i>α</i>-pinene and limonene, to synthesize <i>α</i>-terpinyl methylether using montmorillonite-based catalysts. Two types of catalyst modifications were explored: acid-treated and iron-exchanged montmorillonites. Comprehensive characterization of the materials revealed that acid treatment significantly enhanced both the acidity and catalytic activity of the clays, whereas the untreated montmorillonite remained inactive. Among the iron-modified catalysts, the sample calcined at 400&#xa0;°C exhibited the highest activity (90% conversion, 69% selectivity), outperforming both non-calcined and high-temperature-calcined variants. Acid-treated montmorillonites demonstrated superior catalytic efficiency, achieving up to 70% selectivity to <i>α</i>-terpinyl methylether at complete conversion. Additionally, <i>α</i>-pinene was found to be more reactive than limonene under the tested conditions. These findings highlight the effectiveness of tailored montmorillonite catalysts in promoting selective etherification reactions. The use of earth-abundant, metal-free or minimally modified materials underscores the potential for sustainable and environmentally friendly approaches to terpene valorization in green chemistry applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Montmorillonite as an efficient catalyst in terpinyl methylether preparation from different sources

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月6日

查看全文
  • Eva Vrbková,
  • Lada Dolejšová Sekerová,
  • Eliška Vyskočilová

摘要

This study investigates the direct methoxylation of renewable terpenes, α-pinene and limonene, to synthesize α-terpinyl methylether using montmorillonite-based catalysts. Two types of catalyst modifications were explored: acid-treated and iron-exchanged montmorillonites. Comprehensive characterization of the materials revealed that acid treatment significantly enhanced both the acidity and catalytic activity of the clays, whereas the untreated montmorillonite remained inactive. Among the iron-modified catalysts, the sample calcined at 400 °C exhibited the highest activity (90% conversion, 69% selectivity), outperforming both non-calcined and high-temperature-calcined variants. Acid-treated montmorillonites demonstrated superior catalytic efficiency, achieving up to 70% selectivity to α-terpinyl methylether at complete conversion. Additionally, α-pinene was found to be more reactive than limonene under the tested conditions. These findings highlight the effectiveness of tailored montmorillonite catalysts in promoting selective etherification reactions. The use of earth-abundant, metal-free or minimally modified materials underscores the potential for sustainable and environmentally friendly approaches to terpene valorization in green chemistry applications.