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<p>A series of aluminophosphate catalysts (<i>x</i>P-Al-O-<i>T</i>) with various P/Al molar ratios and calcination temperatures were prepared through a one-pot reaction with F127. The physical and chemical properties of the prepared<i> x</i>P-Al-O-<i>T</i> catalysts were thoroughly investigated using methods such as XRD, FTIR, Py-FTIR, low-temperature nitrogen adsorption–desorption, and NH₃-TPD. The results showed that the prepared <i>x</i>P-Al-O-<i>T</i> samples existed in the amorphous form and weak Lewis acidic sites on the surfaces were predominant. The prepared catalysts were investigated for their catalytic behaviors in gas-phase etherification of diethylene glycol monomethyl ether (DEGME) with dimethyl carbonate (DMC) to produce diethylene glycol dimethyl ether (DEGDME), which is regarded as a green synthetic route. The effects of different P/Al molar ratios and calcination temperatures on the catalyst performance were studied. All the tested catalysts exhibited 100% DEGME conversion. When the calcination temperature was 550&#xa0;°C and the P/Al molar ratio was 0.75, the aluminophosphate catalyst could proceed for 248&#xa0;h without significant loss of activity and changes in product DEGDME selectivity, showing the long catalytic stability.</p> Graphical abstract <p></p>

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Efficient and stable synthesis of diethylene glycol dimethyl ether over aluminophosphate catalyst

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Zhichuang Li,
  • Jingchen Wu,
  • Xiujing Zou,
  • Xingfu Shang,
  • Xueguang Wang

摘要

A series of aluminophosphate catalysts (xP-Al-O-T) with various P/Al molar ratios and calcination temperatures were prepared through a one-pot reaction with F127. The physical and chemical properties of the prepared xP-Al-O-T catalysts were thoroughly investigated using methods such as XRD, FTIR, Py-FTIR, low-temperature nitrogen adsorption–desorption, and NH₃-TPD. The results showed that the prepared xP-Al-O-T samples existed in the amorphous form and weak Lewis acidic sites on the surfaces were predominant. The prepared catalysts were investigated for their catalytic behaviors in gas-phase etherification of diethylene glycol monomethyl ether (DEGME) with dimethyl carbonate (DMC) to produce diethylene glycol dimethyl ether (DEGDME), which is regarded as a green synthetic route. The effects of different P/Al molar ratios and calcination temperatures on the catalyst performance were studied. All the tested catalysts exhibited 100% DEGME conversion. When the calcination temperature was 550 °C and the P/Al molar ratio was 0.75, the aluminophosphate catalyst could proceed for 248 h without significant loss of activity and changes in product DEGDME selectivity, showing the long catalytic stability.

Graphical abstract