PROTON NUCLEAR MAGNETIC RESONANCE STUDIES OF OH STRUCTURE ON THE STRUCTURE OF HY ZEOLITE

【摘要】 <正> Ⅰ. OMTRPDICTION Much attention has been given to the sites of proton donors or electron acceptors in heterogeneous catalysis. For zeolites, these sites are none other than the Bronsted acid (or Lewis acid) ones, which stem from the approachable hydroxyl groups associated with aluminium ions in the framework. Using NMR method, exploratory work had been done on the surface hydroxyl groups of HY zeolite and associated aluminium ion type. The classification of proton population distributions of various zeolite types had been suggested. Theoretical work was also carried更多还原