| abstract |
Disclosed is a general process which, through the use of surfactants, enables to reduce the time durations for the synthesis of crystalline microporous silica-based materials having channels and of which the pore opening is formed of 10 or 12 silica tetrahydra. This process is based on the addition of a surfactant which may be cationic, anionic or neutral to the reaction mixture where the zeolite is formed. Additionally, this new synthesis process increases the performances of the reactive used in the synthesis of zeolite and the stability of the materials obtained, thereby controlling the crystal size. In cases wherein there is some competition in the growth of various microporous materials, it is possible, thorough an appropriate surfactant selection to favor one phase with respect to another phase which is competing with the former. |