ABSTRACT
Catalysis of organic reactions with heterogeneous acid catalysts continues to elicit widespread attention in both academic and industrial laboratories because of the potential of such technology to simplify product isolation, minimize the formation of inorganic waste streams, and realize chemical selectivities which are unattainable in homogeneous media. Zeolitic materials exhibit considerably lower activity than amorphous catalysts; LZY-82, a Y zeolite which is very active for the alkylation of mononuclear aryl amines, exhibits the lowest activity of the catalysts examined; in addition it exhibits enhanced selectivity to N-alkylated derivatives. A result of particular interest in the reactions above is that alkylations performed with propylene occur at a practical rate using a Y zeolite, whereas similar reactions with isobutylene do not. The corresponding analysis with the monoisopropyl derivative shows that it too can occupy the interior of the supercage with no significant steric interactions.
