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<p>Dimethyl carbonate (DMC) is a green chemical with wide industrial applications. It is necessary to develop a method to produce DMC safely, eco-friendly, and economically. In this work, DMC was synthesized via transesterification of ethylene carbonate (EC) and methanol (MeOH) using a heterogeneous base catalyst combining sodium aluminate and cyanoguanidine (SC catalyst). Among the series, the optimized sodium aluminate–cyanoguanidine catalyst (denoted as SC-2, NaAlO<sub>2</sub>/cyanoguanidine weight ratio = 3:4) exhibited the highest activity, achieving a 73% DMC yield, which outperformed sodium aluminate (25%) and sodium carbonate (46%). This enhanced performance is attributed to synergistic effects that arise from structural and basicity enhancements. Under optimized conditions (40 ℃, 2&#xa0;h, 0.5 wt% catalyst, EC: MeOH = 1:8), SC-2 achieved an 85% yield and demonstrated excellent reusability, with less than 20% yield loss over five cycles.</p>

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Optimization of a Recyclable Sodium-Based Heterogeneous Catalyst for Efficient DMC Synthesis Under Mild Conditions

  • 期刊论文

  • 发表日期：

    2025年11月5日

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  • Jae-Yong Byeon,
  • Sang-Hyeok Yoon,
  • Ru-Ri Lee,
  • Beom-Seo Kim,
  • In Wook Nah,
  • Hyun Wook Jung,
  • Jae-Oh Shim

摘要

Dimethyl carbonate (DMC) is a green chemical with wide industrial applications. It is necessary to develop a method to produce DMC safely, eco-friendly, and economically. In this work, DMC was synthesized via transesterification of ethylene carbonate (EC) and methanol (MeOH) using a heterogeneous base catalyst combining sodium aluminate and cyanoguanidine (SC catalyst). Among the series, the optimized sodium aluminate–cyanoguanidine catalyst (denoted as SC-2, NaAlO2/cyanoguanidine weight ratio = 3:4) exhibited the highest activity, achieving a 73% DMC yield, which outperformed sodium aluminate (25%) and sodium carbonate (46%). This enhanced performance is attributed to synergistic effects that arise from structural and basicity enhancements. Under optimized conditions (40 ℃, 2 h, 0.5 wt% catalyst, EC: MeOH = 1:8), SC-2 achieved an 85% yield and demonstrated excellent reusability, with less than 20% yield loss over five cycles.