异丁醇催化胺化制备异丁胺

Preparation of isobutylamine by catalytic amination of isobutanol

采用沉淀-沉积法研制Co-Ni-Zn-Fe/HZSM-5催化剂,用于异丁醇胺化反应合成异丁胺。通过对该反应过程不同载体、活性组分不同配比的研究,确立了该催化体系中最适宜的活性金属组成为22.5%Co、12.8%Ni、3.0%Zn、1.5%Fe。并在压力1.2Mpa、氨醇摩尔比8∶1、温度185℃、醇液体空速0.6~0.8h-1最佳反应条件下,异丁醇的单程转化率达到98.5%,在有效抑制三异丁胺等副产物合成的同时,使一异丁胺和二异丁胺的总选择性达到99.8%,大大提高了合成反应的效能,为异丁胺的高效生产提供了新的方法,具有较好的工业应用价值。

Co-Ni-Zn-Fe/HZSM-5 catalyst was prepared by the precipitation-deposition method and used in the reaction of catalytic amination of isobutanol to isobutylamine. Investigation of the type of carrier,proportion of active ingredients determined the most suitable active metals in the catalyst system as 22.5% Co-12.8% Ni-3.0% Zn-1.5% Fe. Under the optimum reaction conditions:pressure 1.2MPa,amino∶alcohol= 8∶1;temperature 185℃;alcohol liquid flow rate of 0.6-0.8h-1, conversion rate of isobutanol reached 98.5%,Byproducts,such as triisobutylamine,were effectively suppressed at the same time,and total selectivity of isobutylamine and diisobutylamine reached 99.8%. The performance of the reaction was greatly improved , providing a new method for efficient production of isobutylamine with higher value of industrial application.