Abstract: The invention concerns a method for producing a crystalline film comprising zeolite and/or zeolite-like crystals on a porous substrate The method includes the steps of: a) providing a porous substrate, b) rendering at least a part of said porous substrate hydrophobic by treatment with a composition comprising one or more hydrophobic agent(s), d) subjecting said treated porous substrate to a composition comprising zeolite and/or zeolite-like crystals thereby depositing and attaching zeolite and/or zeolite-like crystals on said treated porous substrate, and e) growing a crystalline film comprising zeolite and/or zeolite-like crystals on said treated porous substrate obtained in step d). Crystalline films find use in a variety of fields such as in the production of membranes, catalysts etc.

Abstract: The invention concerns a method for producing a crystalline film comprising zeolite crystals and/or zeolite-like crystals on a porous substrate The method includes the steps of: a) providing a porous substrate, b) rendering at least a part of said porous substrate hydrophobic by treatment with a composition comprising one or more hydrophobic agent(s), d) subjecting said treated porous substrate to a composition comprising zeolite crystals and/or zeolite-like crystals thereby depositing and attaching zeolite crystals and/or zeolite-like crystals on said treated porous substrate, and e) growing a crystalline film comprising zeolite crystals and/or zeolite-like crystals on said treated porous substrate obtained in step d). Crystalline films find use in a variety of fields such as in the production of membranes, catalysts etc.