INFLUENCE OF AGING AND DILUTION ON THE CRYSTALLIZATION OF SILICALITE-1

The correlation between the formation of colloidal aggregates and the crystallization of silicalite-l from a clear solution has been investi gated with in situ combined small-angle X-ray scattering and wide-angl e X-ray scattering, and in situ ultra-small-angle X-ray scattering usi ng synchrotron radiation. Increasing the aging time at room temperatur e of the synthesis mixture prior to heating to the reaction temperatur e reduced the induction period and increased the crystal growth rate w ithout affecting the formation of colloidal aggregates. Dilution of th e synthesis mixtures did not influence the nucleation and crystal grow th rate, and did not affect the formation of colloidal aggregates.