Abstract: A method for producing a crystalline film comprising zeolite and/or zeolite-like crystals on a porous substrate is described. The method has the steps of: providing a porous support; modifying at least a surface of the top-layer of said porous support by treatment with a composition having one or more cationic polymer(s); rendering at least the outer surface of said porous support hydrophobic by treatment with a composition having one or more hydrophobic agent(s); subjecting said treated porous support to a composition having zeolite and/or zeolite-like crystals thereby depositing and attaching zeolite and/or zeolite-like crystals on said treated porous support, and growing a crystalline film of zeolite and/or zeolite-like crystals on said treated porous support and calcination. Crystalline films find use in a variety of fields such as in the production of membranes, catalysts etc.

Abstract: A method for producing a crystalline film comprising zeolite and/or zeolite-like crystals on a porous substrate is described. The method has the steps of: providing a porous support; modifying at least a surface of the top-layer of said porous support by treatment with a composition having one or more cationic polymer(s); rendering at least the outer surface of said porous support hydrophobic by treatment with a composition having one or more hydrophobic agent(s); subjecting said treated porous support to a composition having zeolite and/or zeolite-like crystals thereby depositing and attaching zeolite and/or zeolite-like crystals on said treated porous support, and growing a crystalline film of zeolite and/or zeolite-like crystals on said treated porous support and calcination. 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 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 present invention pertains to a method for producing zeolite or zeolite-like crystals using a composition comprising one or more fluorine-containing compounds as a mineralizing agent. Crystals produced by such a method are smaller in size than crystals available in the art and contain few defects. The invention also relates to zeolite and/or zeolite-like crystals obtainable by a method as provided herein as well as crystals defined by any of the structural characteristics provided herein, and the usage thereof such as in the manufacture of thin films and membranes, absorbents, catalysts etc.

Abstract: The present invention pertains to a method for producing zeolite or zeolite-like crystals using a composition comprising one or more fluorine-containing compounds as a mineralizing agent. Crystals produced by such a method are smaller in size than crystals available in the art and contain few defects. The invention also relates to zeolite and/or zeolite-like crystals obtainable by a method as provided herein as well as crystals defined by any of the structural characteristics provided herein, and the usage thereof such as in the manufacture of thin films and membranes, absorbents, 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.

Abstract: A process is described for the manufacture of crystalline molecular sieve layers with good para-xylene over meta-xylene selectivity's good para-xylene permeances and selectivities. The process requires impregnation of the support prior to hydrothermal synthesis using the seeded method and may be undertaken with pre-impregnation masking. The crystalline molecular sieve layer has a selectivity (&agr;x) for para-xylene over meta-xylene of 2 or greater and a permeance (Qx) for para-xylene of 3.27×10−8 mole(px)/m2.s.Pa(px) or greater measured at a temperature of ≧250° C. and an aromatic hydrocarbon partial pressure of ≧10×103 Pa.

Abstract: The invention is comprised of a procedure for applying molecular sieve films to the surface of different substrates. This procedure is characterized in that microcrystals of the molecular sieves in question bind to the substrate surface in a first step as a monolayer, and are then, in a second step, allowed to grow into a thin, continuous and dense film. Molecular sieve films are of interest in application areas such as preparing membranes, catalysts, sensor devices and polymer reinforcing fillers.