Cu负载型催化剂用于乙醇氨化合成乙腈

Research on catalysts loaded with Cu for amination of ethanol to acetonitrile

研究了不同载体SAPO-11、Montmorillonite-K10、γ-Al2O3、ZnO和MgO负载Cu的催化剂对乙醇氨化合成乙腈反应的影响。结果表明,经还原的Cu起脱氢作用,载体不仅起分散作用而且具有协同催化的作用,其酸碱性对催化结果有显著影响,其中Cu/γ-Al2O3负载型催化剂具有比较理想的催化效果。在此研究基础上,考察了反应条件对Cu/γ-Al2O3催化剂催化性能的影响,筛选出乙醇氨化合成乙腈的适宜反应条件:反应温度290℃、反应压力0.1 MPa、乙醇重时空速1.0 h-1、氨醇摩尔比7.0,在该条件下乙醇转化率99.7%,乙腈选择性达到92.6%。

The catalytic performance of SAPO-11,montmorillonite-K10,γ-Al2O3,ZnO and MgO loaded with Cu were studied for amination of ethanol to acetonitrile.The results showed that reduced copper metal had the function of dehydrogenation,and carriers not only played a role in the dispersion of copper metal but also had a synergistic effect.The acid-base property of carriers was closely related to catalytic results.Among these catalysts,the ideal catalytic results were obtained over the Cu/γ-Al2O3 catalyst.The influence of reaction conditions was investigated,and the favorable conditions of amination of ethanol to acetonitrile over Cu/γ-Al2O3 were as follows：reaction temperature of 290 ℃,reaction pressure of 0.1 MPa,ethanol WHSV of 1.0 h-1 and ammonia/ethanol molar ratio of 7.0.The conversion of ethanol and the selectivity to acetonitrile were 99.7% and 92.6% respectively under the reaction conditions.