The bibliographic part of this report focuses on the growth mechanisms of zeolites. A large number of theories that have been developed up to date are presented, it is important to realize that even though some of them are contradictory, the wide range of conditions used for synthesis allows for differences. More emphasis has subsequently been brought to 3 different fields of applications of zeolites: clear solution synthesis for nanoparticles, synthesis from gel and synthesis of membranes. Experiments were done on all of those applications. For synthesis from gel the goal was to produce 12µm crystals, a time study has also been conducted which shows some of the steps of the synthesis. For the nanoparticles the effect of TPAOH content variation was studied, and 500nm particles were synthesized. For membranes the goal was to improve reproducibility, and different setups were tried to reach it.