羰基合成碳酸二甲酯气相连续性实验.pdfVIP

羰基合成碳酸二甲酯的气相连续性实验 * 王飞燕 刘定华 刘晓勤 南京工业大学 材料化学工程国家重点实验室，江苏 南京 210009 摘要：在甲醇氧化羰基化法合成碳酸二甲酯（DMC ）的间歇反应基础上，进行原料气的气 相连续性研究。考察了原料进气 CO/O2 的摩尔比、空速、催化剂浓度、反应压力、反应温 度和反应时间等因素对催化反应的影响。结果表明，在CO/O2 的摩尔比为2:1 ，流量分别为 400 mL/min 、200 mL/min 时，铜基催化剂浓度为0.25 g/mL ，反应压力为2.8 MPa ，反应温 度为95 ℃，反应时间为6 h 的条件下，甲醇转化率可达到55% 以上，DMC 选择性为93%左 右。 关键词：碳酸二甲酯；羰基合成；铜基催化剂；气相连续 中图分类号：TQ 032.42 文献标识码：A Continuous Vapor Phase Experiments for Synthesis of Dimethyl Carbonate by Oxidative Carbonylation Wang Feiyan Liu Dinghua Liu Xiaoqin Department of Chemical Engineering,Nanjing University of Technology, Nanjing 210009, Jiangsu China Abstract: In order to apply the process of synthesis of dimethyl carbonate (DMC) by oxidative carbonylation to industrial production, this paper studies the effects of feed gas and reaction conditions on methanol conversion and DMC selectivity. Based on the previous research, the high catalytic activity and selectivity were obtained. After the experiment, we indicated the suitable molar ratio of feed gas (molar ratio of CO to O2 was 2) and the input quantity of feed gas (flow rate of CO and O2 was 400 and 200 mL/min), which may be useful to practical production. Under the optimal reaction conditions (concentration of catalyst 0.25 g/mL, pressure 2.8 MPa, *联系人：刘定华 第一作者：王飞燕（1984—），女，硕士研究生，从事催化剂及绿色清洁生产工艺研究 Corresponding author: Assoc. Prof. LIU Dinghua.E-mail: ncldh@njut.edu.cn temperature 368 K, and reaction time 6 h), the methanol conversion could exceed 55% and the DMC selectivity could reach about 93%. Key words ：dimethyl carbonate ；oxidative carbonylation ；copper-based catalyst ；continuous vapor phase 引 言 碳酸二甲酯（DMC ）在绿色化学领域中是一种很重要的化合物。分子中含有羰基、甲 基、甲氧基羰基等，具有良好的反应活性，广泛应用于农药、医药、塑料、染料等领域；可 用