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对苯二甲酸二甲酯催化加氢制1,4-环己烷二甲酸二甲酯的研究
李远华, 彭士超, 李辉
上海师范大学
摘要:
1,4-环己烷二甲醇在高分子工业具有重要的作用,主要用于合成高附加值聚酯产品.在工业上,1,4-环己烷二甲醇主要是由对苯二甲酸二甲酯经两步加氢反应而制得.采用浸渍法制备了Pd/MgO催化剂,并运用X射线衍射(XRD)、透射电子显微镜(TEM)和扫描电子显微镜(SEM)对其进行了结构表征.以乙酸甲酯作溶剂,将制得的Pd/MgO用于对苯二甲酸二甲酯催化加氢制1,4-环己烷二甲酸二甲酯的反应.在180 ℃,4.5 MPa条件下,对苯二甲酸二甲酯转化率为100%,1,4-环己烷二甲酸二甲酯选择性为99%.研究结果表明该催化剂具有良好的应用潜力.
关键词:  1,4-环己烷二甲酸二甲酯  对苯二甲酸二甲酯  加氢反应
DOI:
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基金项目:国家自然科学基金(21273149)
Study on the synthesis of dimethyl 1,4-cyclohexanedicarboxylate by catalytic hydrogenation of dimethyl terephthalate
LI Yuanhua, PENG Shichao, LI Hui
College of Life and Environmental Sciences,Shanghai Normal University
Abstract:
In the field of polymer industry,1,4-cyclohexanedimethanol (CHDM) occupies an important position especially for the synthesis of highly valued polyester products.In industry,CHDM is prepared from dimethyl terephthalate (DMT) through a two-step hydrogenation process Palladium supported on magnesium oxide (Pd/MgO) was prepared by animpregnation method and was characterized by x-ray diffraction (XRD),transmission electron microscope (TEM) and scan electron microscope (SEM).During the hydrogenation of DMT to synthesize dimethyl 1,4-cyclohexanedicarboxylate (DMCD),the as-prepared Pd/MgO was used as the catalyst with methyl acetate as the solvent.Under optimized reaction conditions (reaction temperature:180 ℃,reaction pressure:4.5 MPa),the conversion of DMT was 100% and the selectivity of DMCD was 99%.Such a catalyst shows a good potential in industrial applications.
Key words:  dimethyl 1,4-cyclohexanedicarboxylate  dimethyl terephthalate  hydrogenation