... reducing congeal, aromatization, olefin, and alkylation catalyst. 2. Low silicon HZSM-5 Zeolite Molecular Sieve ... fission, reducing congeal, aromatization, olefin, and alkylation catalyst. - The refinery catalytic cracking catalysts and additives ... ene, propylene, isoamylene olefin hydration catalyst.- Petrochemical aromatization, alkylation, alkylation catalyst. - Various other the required acidic ...