Abstract:

A bromine-containing copper-organic coordination compound was prepared by the reaction of tetrrpropylammonium bromide with copper bromide in ethyl acetate solution.The compound obtained was characterized with FTIR, XRD, ICP-AES and EA.Meanwhile, its catalytic performance for the oxidative carbonylation of methanol was investigated.The results showed that the introduction of ligand could change the density of copper electron cloud, which improved the redox property for the oxidative carbonylation of methanol to prepare dimethyl carbonate.In the presence of strong base and weak acid salts, the per pass conversion of methanol could reach 57% under the reaction conditions of temperature 383 K, pressure 3.5 MPa, and the mass concentration of catalyst in methanol 0.20 g•ml^-1_.

摘要： 以CuBr₂和溴化四丙基铵为原料，在乙酸甲酯溶剂中制备了一种含溴铜配合物，并利用傅立叶红外光谱(FTIR)、X射线粉末衍射(XRD)、元素分析(EA)和电感耦合等离子发射光谱(ICP-AES)对其进行了表征。对该配合物的甲醇氧化羰基化反应催化性能研究表明，配位剂的络合改善了铜电子云密度，有助于提高甲醇选择性氧化羰基合成碳酸二甲酯的氧化还原性能，在催化剂浓度为0.20 g﹒ml^-1、反应温度为383 K、反应压力为3.5 MPa时，甲醇的单程转化率达到57%。