A Study of Silica-Supported Polytitazane-Pt-Mn Bimetallic Complex in the Selective Hydrogenation of Phenol
Chen Chunwei Huang Meiyu Jiang Yingyan (Institute of Chemistry, Academia Sinica, Beijing 100080)
A new kind of inorganic polymer, viz. silica-supported polytitazane(Ti-N), and its platinum-manganese bimetallic complex(Ti-N-Pt-Mn) were prepared. It was found that the complex was a very active and selective catalyst in the hydrogenation of phenol to cyclohexanone (CON) at room temperature under atmospheric pressure. The electron deficient manganese irons act as Lewis adsorption sites for the C=0 group in the CON molecule.The CON readsorption on to platinum and further hydrogenation were suppressed for the addition of manganese. The selectivity of CON formation amounted to 49.2% in the end product.The effect of various reaction paramerters, such as N/Pt/Mn mole ratio, temperature, reaction time and solvent etc.,on the catalystic activity and selectivity have been studied.The complex can be reused for more than three times without any noticeable loss in activityand selectivity.
【CateGory Index】： O643.3