The invention provides methods for completely removing aluminum from existing zeolite frameworks that have been previously considered unalterable due to their small pore sizes and stable crystal structures. Consequently, new combinations of metal atoms and zeolite structures can now be made using the methods disclosed herein. Metal atoms that have useful properties for catalysis and adsorption have been integrated into zeolite structures that provide advantageous size selection or solvation properties to increase rates, conversions, and yields of catalytic processes. The disclosed catalysts and methods reduce the cost of synthesizing useful materials and zeolite structures with compositions of matter that have not been reported.

The present invention relates to a process for preparing a pulverulent, porous crystalline metal silicate, comprising the following steps: a) hydrothermal synthesis in an aqueous mixture comprising (A) at least one silicon source, (B) at least one metal source and (C) at least one mineralizer to obtain an aqueous suspension comprising a porous crystalline metal silicate as reaction product; and b) calcination of the reaction product, characterized in that the calcination is conducted by means of flame spray pyrolysis at an adiabatic combustion temperature within a range of 450-2200° C., wherein the suspension having a solids content of 70% by weight which is obtained in step a) is sprayed into a flame generated by combustion of a fuel in the presence of oxygen to form a pulverulent, porous crystalline metal silicate.

The present invention relates to a process for preparing a pulverulent, porous crystalline metal silicate, comprising the following steps: a) hydrothermal synthesis in an aqueous mixture comprising (A) at least one silicon source, (B) at least one metal source and (C) at least one mineralizer to obtain an aqueous suspension comprising a porous crystalline metal silicate as reaction product; and b) calcination of the reaction product, characterized in that the calcination is conducted by means of flame spray pyrolysis at an adiabatic combustion temperature within a range of 450-2200° C., wherein the suspension having a solids content of 70% by weight which is obtained in step a) is sprayed into a flame generated by combustion of a fuel in the presence of oxygen to form a pulverulent, porous crystalline metal silicate.

The present invention relates to a process for preparing zeolite crystals having a multimodal particle size distribution, and the sizes of which are between 0.02 μm and 20 μm, said process comprising a first introduction of one or more seeding agents into the tubular reactor or upstream of the tubular reactor, and at least one second introduction of one or more, identical or different, seeding agents into the tubular reactor.

The present invention relates to a process for preparing zeolite crystals having a multimodal particle size distribution, and the sizes of which are between 0.02 μm and 20 μm, said process comprising a first introduction of one or more seeding agents into the tubular reactor or upstream of the tubular reactor, and at least one second introduction of one or more, identical or different, seeding agents into the tubular reactor.

The present invention generally relates to binderless zeolitic adsorbents and methods for making the binderless adsorbents. More particularly, the invention relates to FAU type binderless zeolitic adsorbents and methods for making the FAU type binderless adsorbents. The FAU type binderless adsorbents may be used for xylene separation and purification in selective adsorptive separation processes using binderless zeolitic adsorbents.

The present invention generally relates to binderless zeolitic adsorbents and methods for making the binderless adsorbents. More particularly, the invention relates to FAU type binderless zeolitic adsorbents and methods for making the FAU type binderless adsorbents. The FAU type binderless adsorbents may be used for xylene separation and purification in selective adsorptive separation processes using binderless zeolitic adsorbents.

The present invention relates to a method for the preparation of faujasite nanocrystals, to faujasite nanocrystals, to a method for the preparation of a stable colloidal suspension of faujasite nanocrystals, to a stable colloidal suspension of faujasite nanocrystals, and to the use of said faujasite nanocrystals and said stable colloidal suspension of faujasite nanocrystals in various applications.

The present invention relates to a method for the preparation of faujasite nanocrystals, to faujasite nanocrystals, to a method for the preparation of a stable colloidal suspension of faujasite nanocrystals, to a stable colloidal suspension of faujasite nanocrystals, and to the use of said faujasite nanocrystals and said stable colloidal suspension of faujasite nanocrystals in various applications.

The present application relates to a method for synthesizing nanozeolite Y crystals, nanozeolite Y crystals obtainable by said method, and the use of the synthesized nanozeolite Y crystals in cracking hydrocarbons, as molecular sieves or as ion-exchangers.