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US 2020/0246775 A1Published application
Supported zeolite films and methods for preparing
AssigneeZeoMem Sweden AB
InventorsJonas Hedlund, Allan Holmgren, Liang Yu
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AssigneeZeoMem Sweden AB
InventorsJonas Hedlund, Allan Holmgren, Liang Yu
Estimating the term…
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.
A method for producing a substrate or porous support for deposition of a crystalline film comprising zeolite and/or zeolite-like crystals, said method comprising the steps of:
A method for producing a crystalline film comprising zeolite and/or zeolite-like crystals on a substrate or porous support, said method comprising the steps of:
A method according to any one of the preceding claims, wherein said substrate or porous support is made hydrophobic using hydrophobic agent(s) comprising one or more hydroxamate(s) and/or one or more silane(s) such as organo silanes, alkyl silanes, hydro silanes, dialkyl silanes, fluorinated alkyl silanes, fluorinated dialkyl silanes, perfluorinated alkyl silanes, fluorinated alkoxy silanes, chloro silanes, fluorinated chloro silanes or a combination thereof.
A method according to any one of the preceding claims, wherein the zeolite material is selected from the group comprising silicalite-1, zeolite A, zeolite Beta, the zeolites L, Y, X, ZSM-22, ZSM-11, ZSM-5, ZSM-2, LTA, SAPO-34, DDR, mordenite, chabazite, faujasite, sodalite, ferrierite, MFI and phillipsite.
A method according to any one of the preceeding claims, wherein the porous support is asymmetric and the top layer is charge modified.
A method according to any one of the preceeding claims, wherein the top surface of the substrate or porous support is charge modified.
A method according to any one of the preceeding claims, wherein the product of steps (a) to (c) is used in subsequent steps of the method without calcination.
A substrate or porous support comprising substrate or porous support material with a first layer of deposited charge modifying material and a second layer of hydrophobic agent(s).
A crystalline film on a substrate or porous support, comprising a substrate or porous support material with a first deposited layer of charge modifying material, a deposited layer of hydrophobic agent(s) and a crystalline zeolite film hydrothermally grown from zeolite seed crystals.
Dependencies are inferred from the claim text.