The catalytic production of diphenylmethane from the reaction benzene with benzyl alcohol was investigated using HZSM-12 and desilicated that obtained by treating ZSM-12 0.2M NaOH solution at 85?C for 60 min. untreated alkaline treated zeolites were characterized X-ray diffraction, nitrogen adsorption/desorption isotherms, scanning electron microscopy, inductively coupled plasma optical emissio...