【摘要】 以商品化的活性炭为载体,采用浸渍法制备了稳定、易回收且Ir质量分数为5%的多相催化剂Ir-N@C,考察了不同组分的铱基催化剂、反应温度、反应时间、碱对N-烷基化反应的影响。结果表明,n(Ir)∶n(1,10-Phenanthroline)=1∶2的铱基催化剂,可以在水相中高效催化包括氨水在内的多种胺类与伯醇的N-烷基化反应。运用XRD、TEM、XPS、BET测定手段对催化剂进行了表征。在循环实验中,催化剂体现了较好的稳定性和催化活性,其中,苄醇的转化率为79.1%~92.3%,三苄胺的选择性为74.3%~85.6%。更多还原

【Abstract】 A stable,easily recoverable heterogeneous catalyst Ir-N@C( the mass fraction of iridium is5%) was obtained by impregnation with commercial carbon powder. The factors of the N-alkylation reaction including different iridium catalysts,reaction temperature,reaction time and bases were investigated. Experiment results suggested that the N-alkylation of amines with primary alcohols could be efficiently catalyzed in water using iridium catalyst with n( Ir) ∶ n( 1,10-phenanthroline) = 1∶2. The catalyst was characterized by XRD,TEM,XPS,BET. In recycling experiments,the catalyst showed acceptable stability and the catalytic activity. The conversion of benzyl alcohol was 79. 1% ~ 92. 3%,and the selectivity to tribenzylamine was 74. 3% ~ 85. 6%.更多还原