Synthesis of Dimethyl Terephthalate from Terephthalic Acid Esterification over the Zeolite Catalysts

IF 3.4 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Inorganics Pub Date : 2025-06-05 DOI:10.3390/inorganics13060184

Nan Jia, Haoyu Han, Tao Yang, Meng Zhang, Zhongyi Liu

引用次数: 1

Abstract

The esterification of terephthalic acid (PTA) with methanol to dimethyl terephthalate (DMT) was investigated using commercially available zeolite catalysts as the eco-friendly solid acids. Six typical zeolites (ZSM-5-25, ZSM-5-50, ZSM-5-100, ZSM-35, MOR, and β) were systematically evaluated. Among them, β zeolite showed excellent catalytic performance, achieving nearly 100% PTA conversion and 76.1% DMT selectivity under the conditions of 200 °C, of 0.5 MPa N2 pressure, m(PTA):V(methanol) of 1:40 (g/mL), m(PTA):m(catalyst) of 10:1 over 4 h. The characterization results show that the catalytic efficiency was correlated with acid site strength, specific surface area, and mesoporous structure of the zeolite. After optimization, β zeolite achieved 100% PTA conversion and 94.1% DMT selectivity under the conditions of 200 °C, of 1 MPa N2 pressure, m(PTA)/V(methanol) of 1:30 (g/mL), m(PTA)/m(catalyst) of 8:1 over 8 h. Moreover, β zeolite exhibited superior stability, maintaining over 92% of its initial activity after five cycles, highlighting its potential for sustainable DMT production.

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沸石催化剂催化对苯二甲酸酯化合成对苯二甲酸二甲酯

采用市售沸石催化剂作为环保型固体酸，研究了对苯二甲酸（PTA）与甲醇的酯化反应制对苯二甲酸二甲酯（DMT）。对6种典型沸石（ZSM-5-25、ZSM-5-50、ZSM-5-100、ZSM-35、MOR和β）进行了系统评价。其中，β沸石表现出优异的催化性能，在200℃、0.5 MPa N2压力、m(PTA):V（甲醇）为1:40 （g/mL）、m(PTA):m（催化剂）为10:1的条件下，催化4 h， PTA转化率接近100%，DMT选择性为76.1%。表征结果表明，催化效率与沸石的酸位强度、比表面积和介孔结构有关。优化后，在200℃、1 MPa N2压力、m(PTA)/V（甲醇）为1:30 （g/mL）、m(PTA)/m（催化剂）为8:1的条件下，β沸石在8 h内的PTA转化率为100%，DMT选择性为94.1%。此外，β沸石表现出优异的稳定性，在5个循环后仍保持92%以上的初始活性，显示了其可持续生产DMT的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Inorganics Chemistry-Inorganic Chemistry

CiteScore

2.80

自引率

10.30%

发文量

193

审稿时长

6 weeks

期刊介绍： Inorganics is an open access journal that covers all aspects of inorganic chemistry research. Topics include but are not limited to: synthesis and characterization of inorganic compounds, complexes and materials structure and bonding in inorganic molecular and solid state compounds spectroscopic, magnetic, physical and chemical properties of inorganic compounds chemical reactivity, physical properties and applications of inorganic compounds and materials mechanisms of inorganic reactions organometallic compounds inorganic cluster chemistry heterogenous and homogeneous catalytic reactions promoted by inorganic compounds thermodynamics and kinetics of significant new and known inorganic compounds supramolecular systems and coordination polymers bio-inorganic chemistry and applications of inorganic compounds in biological systems and medicine environmental and sustainable energy applications of inorganic compounds and materials MD