Zeolite-catalysed liquid-phase synthesis of isopropyl tert-butyl ether by the addition of 2-propanol to isobutene

摘要: Abstract The paper deals with the liquid-phase synthesis of isopropyl tert -butyl ether (IPTBE) from 2-propanol and isobutene over H-Beta, H-ZSM-5, H-Y zeolites. SiO 2 /Al O 3 ratio tested zeolites was about 25 for 28 6 H-Y. Experiments were performed in a batch reactor temperature range 70–90 °C at 1.6 MPa. A comparative study behaviour these catalysts made 80 °C by an initial alcohol-to-isobutene molar ( R / ) 1. We optimised activation process three varying time calcination, thus selecting experimental conditions leading to highest activity selectivity. H-Beta most active selective catalyst. Therefore, kinetics IPTBE studied on 70–90 °C, 0.7 2. best kinetic model stems mechanism which reacts 2-propanol, both adsorbed one site, give site. apparent energy estimated be 92 ± 12  kJ mol −1 .