溴化1,10-菲啰啉铜配合物催化甲醇氧化羰基化合成碳酸二甲酯（英文）

• Published in: 中国化学工程学报：英文版 no. 10; pp. 1117 - 1121
• Main Author: 杜治平 熊利花 林志坤 李徐立 丁一刚 吴元欣
• Format: Journal Article
• Language: English
• Published: 2014
• Subjects: carbonate; carbonylation; Cu(phen)Br2; Dimethyl; Methanol; Oxidative
• ISSN: 1004-9541; 2210-321X

In order to develop the catalysts with low corrosiveness for the oxidative carbonylation of methanol to dimethyl carbonate(DMC), Cu Br2 was selected as the metal source to prepare Cu coordination compounds, Cu(phen)Br2,[Cu(phen)2Br]Br and [Cu(phen)3]Br2(phen = 1,10-phenanthroline). These complexes were characterized by thermogravimetric analysis and temperature-programmed reduction. Their catalytic performances were investigated. It was found that the metal coordination environments and thermal stability of the complexes played an important role in their catalytic activities. Cu(phen)Br2exhibited the highest activity due to the lowest steric hindrance, the most positions occupied by the bromide ions and the highest thermal stability. The turnover number was up to 47.6 DMC mol·(Cu mol)-1with selectivity of 92.8% under conditions of 120 °C, ratio of partial pressure of CO to O2 of 19:1(below the explosion limit of CO) and catalyst concentration of 0.011 mol·L-1.Furthermore, a plausible reaction mechanism was suggested on the basis of the experimental data.