Abstract
The catalytic vapour-phase nitration of benzene with aqueous nitric acid has been carried out on modified Y zeolites. The influence of various ultrastabilization and activation procedures on the catalytic activity and stability of the materials was investigated. The modified Y zeolites were characterized by physico-chemical methods, and correlations between catalyst properties and catalytic performance are discussed. It was found that modified Y zeolites are active catalysts for the vapour-phase nitration of benzene, and that both nitrobenzene space time yield and catalytic stability are strongly dependent on the preparation procedure. Thus, stable catalysts for the vapour-phase nitration of benzene were obtained by acid treatment of low sodium ultrastabilized Y zeolites.
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