. Em outros ensaios, foram obtidas fases secundárias de NaAlSiO 4 e SiO 2 , bem como zeólita ZSM-5, analcima, omega e Linde B2.Palavras-chave: BEA; razão Si/Al; Tempo; Temperatura. AbstractThe choice of synthesis parameters influences obtainment of a suitable material for use in several applications. In this paper, zeolite beta (BEA) was successfully obtained by hydrothermal synthesis, assessing the following parameters: Si/Al ratio, time and crystallization temperature. The synthesized materials were characterized by X-ray diffraction (XRD), Fourier-Transfer Infrared (FTIR) spectroscopy, thermogravimetry (TG and DTG) and N 2 adsorption-desorption isotherm analyses. Xray diffraction showed that the change of only one of these parameters acts on the formation of the desired microporous structure. BEA was obtained in the Si/Al ratio equal 8, with a crystallization time of 4 days at 170 °C, presenting a specific area of 437 m . In other assays, secondary phases of NaAlSiO 4 and SiO 2 were obtained, as well as ZSM-5 zeolite, analcime, omega and linde B2.