The present invention relates to processes for the preparation of mesoporous zeolites by post-synthetic technologies, the properties of resulting materials, and the use of the resulting materials as catalysts in the refining and petrochemical industry.

The present invention relates to processes for the preparation of mesoporous zeolites by post-synthetic technologies, the properties of resulting materials, and the use of the resulting materials as catalysts in the refining and petrochemical industry.

Lithium ion-exchanged zeolite particles and methods of making such lithium ion-exchanged zeolite particles are provided herein. The method includes combining precursor zeolite particles with (NH.sub.4).sub.3PO.sub.4 to form a first mixture including intermediate zeolite particles including NH.sub.4.sup.+ cations. The method further includes adding a lithium salt to the first mixture to form the lithium ion-exchanged zeolite particles, or separating the intermediate zeolite particle from the first mixture and combining the intermediate zeolite particles with the lithium salt to form the lithium ion-exchanged zeolite particles.

Lithium ion-exchanged zeolite particles and methods of making such lithium ion-exchanged zeolite particles are provided herein. The method includes combining precursor zeolite particles with (NH.sub.4).sub.3PO.sub.4 to form a first mixture including intermediate zeolite particles including NH.sub.4.sup.+ cations. The method further includes adding a lithium salt to the first mixture to form the lithium ion-exchanged zeolite particles, or separating the intermediate zeolite particle from the first mixture and combining the intermediate zeolite particles with the lithium salt to form the lithium ion-exchanged zeolite particles.

A method of making a molecular sieve may include: reacting a source selected from the group consisting of: a source of a tetrahedral element in the presence of a structure directing agent (SDA) selected from the group consisting of: Ar.sup.+-L-Ar, Ar.sup.+-L-Ar-L-Ar.sup.+, Ar.sup.+-L-Ar-L-NR3.sup.+, and ArAr.sup.+-L-Ar.sup.+Ar, where Ar.sup.+ is to a N-containing cationic aromatic ring, Ar is to a non-charged aromatic ring, L is a methylene chain of 3-6 carbon atoms, NR3.sup.+ is to a quaternary ammonium, and ArAr.sup.+ and Ar.sup.+Ar are a fused aromatic ring structure comprising both a N-containing cationic portion and a non-charged portion, to produce the molecular sieve.

A method for synthesizing a zeolite is described. The method may include the steps of: (a) preparing an aqueous mixture comprising water, a substituted hydrocarbon, and a 1-oxa-4-azacyclohexane derivative; (b) reacting the aqueous mixture; (c) obtaining a solution comprising an organo-1-oxa-4-azoniumcyclohexane compound; (d)) forming a reaction mixture comprising reactive sources of Al, and Si, and the solution; and (e) heating the reaction mixture to form the zeolite.

A method for synthesizing a zeolite is described. The method may include the steps of: (a) preparing an aqueous mixture comprising water, a substituted hydrocarbon, and a 1-oxa-4-azacyclohexane derivative; (b) reacting the aqueous mixture; (c) obtaining a solution comprising an organo-1-oxa-4-azoniumcyclohexane compound; (d)) forming a reaction mixture comprising reactive sources of Al, and Si, and the solution; and (e) heating the reaction mixture to form the zeolite.

A method for preparing a zeolite L host-guest material hosting at least one type of guest molecule including the steps of: a) obtaining a composition including at least one cyclic siloxane and a mixture of guest molecules and zeolite L crystals having straight through channels, and b) heating the composition obtained in step a) to at least 100° C. to incorporate the organic guest molecules in the channels of the zeolite L crystals.

A method for preparing a zeolite L host-guest material hosting at least one type of guest molecule including the steps of: a) obtaining a composition including at least one cyclic siloxane and a mixture of guest molecules and zeolite L crystals having straight through channels, and b) heating the composition obtained in step a) to at least 100° C. to incorporate the organic guest molecules in the channels of the zeolite L crystals.

Compositions and methods for preparing mesoporous and/or mesostructured materials from low SAR zeolites are provided herewith. In particular, methods are provided that involve: (a) providing a low SAR zeolite, (b) optionally subjecting the low SAR zeolite to an acid framework modification, and (c) subjecting the framework-modified zeolite to a mesopore formation treatment. The resulting mesoporous zeolites can have bi-modal mesoporosity and higher aluminum contents relative to existing mesoporous zeolites.