The Q-Max process utilizes either QZ-2500H or QZ-2000 for the alkylation reactor,
and QZ-2100 or QZ-2000 for the transalkylation reactor. The newest class of
catalysts, QZ-2500H and QZ-2100, are novel proprietary zeolites invented by UOP.
Zeolitic catalysts have been used commercially for many years in other applications
such as hydrotreating and hydrocracking.