Ga-ZSM-5 zeolite was synthesized by hydrothermal crystallization at 150-200?from a mixture containing NH4F and Pr4NBr as template at pH 5-7. NH4-form precursors were obtained and converted to H-form Ga-ZSM-5 after calcination. Ga-ZSM-5 zeolite was characterized by x-ray diffraction; SEM and electron microprobe anal., IR, XPS and DTA, which showed that the Ga atoms were situated in the zeolite framework.

Key words: AMMONIUM COMPOUND, MEDIA, MOLECULAR SIEVE, ACIDITY, BROMIDE, FLUORIDE, STRUCTURE AND PROPERTY CORRELATION, ZEOLITE ZSM-5, GALLIUM