One-Pot Conversion of Dimethyl Terephthalate into 1,4-Cyclohexanedimethanol with Supported Trimetallic RuPtSn Catalysts

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• 作者：Xuefeng Li ; Zhiyi Sun ; Jiali Chen ; Yue Zhu ; Fazhi Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：January 15, 2014
• 年：2014
• 卷：53
• 期：2
• 页码：619-625
• 全文大小：355K
• ISSN：1520-5045

文摘

It is of economic and environmental interest to develop novel integrated methodologies allowing one-pot synthesis process with single catalyst. Herein, we report our attempt to catalytically hydrogenate dimethyl terephthalate (DMT) into 1,4-cyclohexanedimethanol (CHDM), a linker molecule for polyester fibers which can be produced in practice by a two-step process with two reactors, using supported trimetallic RuPtSn/Al₂O₃ catalysts in one batch reactor. The catalytic hydrogenation reaction is carried out by two consecutive reaction stages with different reaction temperature and pressure in the batch reactor. The results of catalytic performance and sample characterization by XRD, TPR, and HRTEM demonstrate that trimetallic RuPtSn catalysts show a synergistic effect on the catalytic hydrogenation of DMT to CHDM. Ru₄Pt₂Sn₈/Al₂O₃ catalyst sample presents higher CHDM yield. A possible mechanism of hydrogenation reaction, which may contain two distinct catalytic active sites related with Ru metal particles, is also provided.