A method of forming composite zeolite catalyst particles includes combining a silicon source, an aqueous organic structure directing agent having a polyquaternary ammonium compound, water and an aluminum source to form a catalyst gel. The method also includes heating the catalyst gel to form the composite zeolite catalyst particle having an intergrowth region with a mixture of both Mordenite crystals and ZSM-5 crystals. An associated method of making xylene includes feeding heavy reformate to a reactor, the reactor containing the composite zeolite catalyst particles, and producing xylene by simultaneously performing dealkylation and transalkylation of the heavy reformate in the reactor, where each composite zeolite catalyst particle is able to catalyze both the dealkylation and transalkylation reactions.

A method of forming composite zeolite catalyst particles includes combining a silicon source, an aqueous organic structure directing agent having a polyquaternary ammonium compound, water and an aluminum source to form a catalyst gel. The method also includes heating the catalyst gel to form the composite zeolite catalyst particle having an intergrowth region with a mixture of both Mordenite crystals and ZSM-5 crystals. An associated method of making xylene includes feeding heavy reformate to a reactor, the reactor containing the composite zeolite catalyst particles, and producing xylene by simultaneously performing dealkylation and transalkylation of the heavy reformate in the reactor, where each composite zeolite catalyst particle is able to catalyze both the dealkylation and transalkylation reactions.

The invention relates to a method for preparing a hierarchical porous zeolite membrane and an application thereof, comprising the following steps: a mesoporous structure-directing agent is added to limit the growth of zeolite crystals, and self-assembled in the crystallization process to generate a mesoporous structure. Based on a seed crystal induced secondary nucleation mechanism, this method can realize one-step hydrothermal synthesis of hierarchical porous zeolite membrane with the advantages of mild and controllable synthesis conditions, simple process, good repeatability, reduced energy consumption and cost savings. The hierarchical porous zeolite membrane prepared by the method has good cut-off performance, and the cut-off molecular weight is adjustable between 200 to 500,000 Da.

This application consists of a method for the synthesis of a type of FER/MOR composite molecular sieve. That method consisting of mixing FER seed crystals, MOR seed crystals, a silicon source, water and an acid or alkali, thus yielding a reaction mixture; by adjusting the proportions of the seed crystals added, the silicon-aluminium proportion, acidity/alkalinity and other reaction conditions, it is possible to obtain a dual phase composite molecular sieve within which the proportions of the crystal phases may be adjusted. In the synthesis process to which the method of this application relates, there is no need to add any organic template, thus reducing the cost of the reaction, in addition to reducing likely environmental pollution, thus having major potential applications.

The present disclosure is directed to a method to co-synthesize amorphous and crystalline porous materials, including a phase of crystalline solids possessing well-defined structures and uniform pore sizes, and an amorphous phase. A sol-gel formulation which includes a water-soluble fraction of ODSO as an additional component is provided that precipitates multiple solid phases.

The present invention relates to a process for the preparation of a zeolitic material comprising YO.sub.2 in its framework structure, wherein Y stands for a tetravalent element, wherein said process comprises the steps of: (1) providing a mixture comprising one or more sources for YO.sub.2, one or more fluoride containing compounds, and one or more structure directing agents; (2) crystallizing the mixture obtained in step (1) for obtaining a zeolitic material comprising YO.sub.2 in its framework structure;
wherein the mixture provided in step (1) and crystallized in step (2) contains 35 wt.-% or less of H.sub.2O based on 100 wt.-% of YO.sub.2 contained in the mixture provided in step (1) and crystallized in step (2), as well as to a zeolitic material comprising YO.sub.2 in its framework structure obtainable and/or obtained according to said process, and to a zeolitic material per se comprising SiO.sub.2 in its framework structure, wherein in the .sup.29Si MAS NMR spectrum of the as-synthesized zeolitic material the ratio of the total integration value of the peaks associated to Q3 signals to the total integration value of the peaks associated to Q4 signals is in the range of from 0:100 to 20:80, including the use of the aforementioned zeolitic materials.

Methods for producing mesoporous zeolites are provided. In some embodiments, the method includes mixing a silicon-containing material, an aluminum-containing material, or both, with a quaternary amine and at least one base to produce a zeolite precursor solution. The zeolite precursor solution is combined with nanocellulose to form a zeolite precursor gel, from which volatiles are removed. The zeolite precursor gel is crystallized to produce a crystalline zeolite intermediate. The crystalline zeolite intermediate is calcined to form the mesoporous zeolite. The nanocellulose mesopores template may include cellulose nanocrystals, nanocellulose fibers, or combinations thereof. The quaternary amine may include tetraethylammonium hydroxide, tetraethylamonnium alkoxide, tetrapropylammonium alkoxide, other alkaline materials comprising ammonium, or combinations thereof.

Crystalline molecular sieves and their synthesis using quaternary N-methyl-diisoalkylammonium cations as organic structure directing agents are disclosed. The structure directing agent has the following structure (1): ##STR00001##
in which R.sup.1 is selected from hydrogen, a methyl group, an ethyl group, a propyl group, and a hydroxymethyl group; and R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are independently selected from a methyl group, an ethyl group, and a propyl group.

Core @ layered double hydroxide shell materials of the invention have the formula:

T.sub.p@{[M.sup.z+.sub.(1x)M.sub.x.sup.y+(OH).sub.2].sup.a+(X.sup.n).sub.a/n.Math.bH.sub.2O.Math.c(AMO-solvent)}.sub.q

wherein T is a solid, porous, inorganic oxide-containing framework material, M.sup.z+ is a metal cation of charge z or a mixture of two or more metal cations each independently having the charge z; M.sup.y+ is a metal cation of charge y or a mixture of two or more metal cations each independently having the charge y; z=1 or 2; y=3 or 4; 0<x<0.9; b is 0 to 10; c is 0.01 to 10; p>0; q>0; X.sup.n is an anion; with n>0; a=z(1x)+xy2; and AMO-solvent is an organic solvent which is completely miscible with water.

Also disclosed are the products obtained by calcining the core @ layered double hydroxide shell materials which calcination products are core @ mixed metal oxide materials having the formula

T.sub.p@[{M.sup.z+.sub.1xM.sup.y+.sub.xO.sub.w].sub.p]

wherein T is a solid, porous, inorganic oxide-containing framework material, M.sup.z+.sub.1xM.sup.y+.sub.xO.sub.w is a mixed metal oxide, or mixture of mixed metal oxides, which may be crystalline or non-crystalline, wherein M.sup.z+ and M.sup.y+ are different charged metal cations; M.sup.z+ is a metal cation of charge z or a mixture of two or more metal cations each independently having the charge z; M.sup.y+ is a metal cation of charge y or a mixture of two or more metal cations each independently having the charge y; z is 1 or 2; y is 3 or 4; 0<x<0.9; w>0; p>0 and q>0; is the residue of an X.sup.n anion in which n>0.

Core @ layered double hydroxide shell materials of the invention have the formula:

T.sub.p@{[M.sup.z+.sub.(1x)M.sub.x.sup.y+(OH).sub.2].sup.a+(X.sup.n).sub.a/n.Math.bH.sub.2O.Math.c(AMO-solvent)}.sub.q

wherein T is a solid, porous, inorganic oxide-containing framework material, M.sup.z+ is a metal cation of charge z or a mixture of two or more metal cations each independently having the charge z; M.sup.y+ is a metal cation of charge y or a mixture of two or more metal cations each independently having the charge y; z=1 or 2; y=3 or 4; 0<x<0.9; b is 0 to 10; c is 0.01 to 10; p>0; q>0; X.sup.n is an anion; with n>0; a=z(1x)+xy2; and AMO-solvent is an organic solvent which is completely miscible with water.

Also disclosed are the products obtained by calcining the core @ layered double hydroxide shell materials which calcination products are core @ mixed metal oxide materials having the formula

T.sub.p@[{M.sup.z+.sub.1xM.sup.y+.sub.xO.sub.w].sub.p]

wherein T is a solid, porous, inorganic oxide-containing framework material, M.sup.z+.sub.1xM.sup.y+.sub.xO.sub.w is a mixed metal oxide, or mixture of mixed metal oxides, which may be crystalline or non-crystalline, wherein M.sup.z+ and M.sup.y+ are different charged metal cations; M.sup.z+ is a metal cation of charge z or a mixture of two or more metal cations each independently having the charge z; M.sup.y+ is a metal cation of charge y or a mixture of two or more metal cations each independently having the charge y; z is 1 or 2; y is 3 or 4; 0<x<0.9; w>0; p>0 and q>0; is the residue of an X.sup.n anion in which n>0.