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

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Research on Chemical Intermediates Pub Date : 2025-07-01 DOI:10.1007/s11164-025-05667-5

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

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Abstract

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

Abstract Image

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磷酸铝催化高效稳定合成二甘醇二甲醚

通过与F127的一锅反应，制备了不同P/Al摩尔比和煅烧温度的磷酸铝催化剂（xP-Al-O-T）。采用XRD、FTIR、Py-FTIR、低温氮吸附-解吸、NH₃-TPD等方法对所制备的xP-Al-O-T催化剂的理化性质进行了研究。结果表明：制备的xP-Al-O-T样品以非晶态存在，表面以弱Lewis酸位为主；研究了所制备的催化剂与碳酸二甲酯（DMC）气相醚化制备二乙二醇二甲醚（DEGDME）的催化性能，该工艺被认为是一条绿色合成路线。研究了不同P/Al摩尔比和煅烧温度对催化剂性能的影响。所有测试的催化剂都表现出100%的DEGME转化率。当煅烧温度为550℃，P/Al摩尔比为0.75时，磷酸铝催化剂可持续248 h，活性无明显损失，产物DEGDME选择性无明显变化，表现出较长的催化稳定性。图形抽象

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来源期刊

Research on Chemical Intermediates 化学-化学综合

CiteScore

5.70

自引率

18.20%

发文量

229

审稿时长

2.6 months

期刊介绍： Research on Chemical Intermediates publishes current research articles and concise dynamic reviews on the properties, structures and reactivities of intermediate species in all the various domains of chemistry. The journal also contains articles in related disciplines such as spectroscopy, molecular biology and biochemistry, atmospheric and environmental sciences, catalysis, photochemistry and photophysics. In addition, special issues dedicated to specific topics in the field are regularly published.