In an embodiment, the present disclosure pertains to a composition comprising a zeolite with high silica content. In some embodiments, the silica to aluminum ratio (SAR) for the zeolite is 2:1. In some embodiments, the zeolite comprises Zeolite HOU-2 (LTA-type). In some embodiments, the silica to aluminum ratio (SAR) for the zeolite is >3. In some embodiments, the zeolite comprises Zeolite HOU-3 (FAU type). In some embodiments, the zeolite is synthesized using a one-step method. In some embodiments, the zeolite is synthesized without the use of an organic structure-directing agent (OSDA). In some embodiments, the zeolite is synthesized without the use of post-synthesis dealumination. In some embodiments, the zeolite is synthesized without the use crystal seeds. In some embodiments, the zeolite is used in commercial ion exchange. In some embodiments, the zeolite is used for catalysis reaction. In some embodiments, the zeolite is highly thermostable.

In an embodiment, the present disclosure pertains to a composition comprising a zeolite with high silica content. In some embodiments, the silica to aluminum ratio (SAR) for the zeolite is 2:1. In some embodiments, the zeolite comprises Zeolite HOU-2 (LTA-type). In some embodiments, the silica to aluminum ratio (SAR) for the zeolite is >3. In some embodiments, the zeolite comprises Zeolite HOU-3 (FAU type). In some embodiments, the zeolite is synthesized using a one-step method. In some embodiments, the zeolite is synthesized without the use of an organic structure-directing agent (OSDA). In some embodiments, the zeolite is synthesized without the use of post-synthesis dealumination. In some embodiments, the zeolite is synthesized without the use crystal seeds. In some embodiments, the zeolite is used in commercial ion exchange. In some embodiments, the zeolite is used for catalysis reaction. In some embodiments, the zeolite is highly thermostable.

According to one or more embodiments disclosed herein, a mesoporous zeolite may be made by a method comprising contacting an initial zeolite material with ammonium hexafluorosilicate to modify the framework of the initial zeolite material, and forming mesopores in the framework-modified zeolite material. The contacting may form a framework-modified zeolite material. The mesoporous zeolites may be incorporated into catalysts.

A process for preparing a nanometric zeolite Y of FAU structural type with a crystal size of less than 100 nm and an A/B ratio of greater than 2, by mixing, in aqueous medium, of at least one source AO.sub.2 of at least one tetravalent element A chosen from silicon, germanium and titanium, of at least one source BO.sub.b of at least one trivalent element B chosen from aluminum, boron, iron, indium and gallium, of at least one source C.sub.2/mO of an alkali metal or alkaline-earth metal C chosen from lithium, sodium, potassium, calcium and magnesium, where source C.sub.2/mO also includes at least one source of hydroxide ions, to obtain a gel, maturation and hydrothermal treatment of the gel.

A process for preparing a nanometric zeolite Y of FAU structural type with a crystal size of less than 100 nm and an A/B ratio of greater than 2, by mixing, in aqueous medium, of at least one source AO.sub.2 of at least one tetravalent element A chosen from silicon, germanium and titanium, of at least one source BO.sub.b of at least one trivalent element B chosen from aluminum, boron, iron, indium and gallium, of at least one source C.sub.2/mO of an alkali metal or alkaline-earth metal C chosen from lithium, sodium, potassium, calcium and magnesium, where source C.sub.2/mO also includes at least one source of hydroxide ions, to obtain a gel, maturation and hydrothermal treatment of the gel.

Preparation of a FAU-structural-type nanometric zeolite Y having a crystal size of less than 100 nm and an Si/Al ratio that is greater than 2: mixing, in aqueous medium, of at least one AO.sub.2 source of at least one tetravalent element A that is silicon, germanium, and/or titanium, at least one BO.sub.b source of at least one trivalent element B that is aluminum, boron, iron, indium, and/or gallium, at least one C.sub.2/mO source of an alkaline metal or alkaline-earth metal C that is lithium, sodium, potassium, calcium, and/or magnesium the C.sub.2/mO source also having at least one hydroxide ion source obtaining a gel, curing of the gel after at least 3 days of curing, with addition of at least one source of at least one tetravalent element A and the hydrothermal treatment of the gel obtained at a to achieve crystallization of the FAU-structural-type nanometric zeolite Y.

Preparation of a FAU-structural-type nanometric zeolite Y having a crystal size of less than 100 nm and an Si/Al ratio that is greater than 2: mixing, in aqueous medium, of at least one AO.sub.2 source of at least one tetravalent element A that is silicon, germanium, and/or titanium, at least one BO.sub.b source of at least one trivalent element B that is aluminum, boron, iron, indium, and/or gallium, at least one C.sub.2/mO source of an alkaline metal or alkaline-earth metal C that is lithium, sodium, potassium, calcium, and/or magnesium the C.sub.2/mO source also having at least one hydroxide ion source obtaining a gel, curing of the gel after at least 3 days of curing, with addition of at least one source of at least one tetravalent element A and the hydrothermal treatment of the gel obtained at a to achieve crystallization of the FAU-structural-type nanometric zeolite Y.

A method for synthesizing an aluminosilicate molecular sieve of SWY framework topology via interzeolitic conversion is described. The method includes (1) a step of preparing a reaction mixture containing an aluminosilicate zeolite of FAU framework topology, a structure directing agent comprising a 1-methyl-1-[7-(trimethylammonio)heptyl]piperidinium cation, a source of an alkali metal cation, a source of hydroxide ions, and water; and (2) a step of heating the reaction mixture to obtain an aluminosilicate molecular sieve of SWY framework topology.

The present disclosure provides a molecular sieve, a sound absorbing material using the molecular sieve, and a speaker. The molecular sieve is a core-shell molecular sieve. The core-shell molecular sieve includes a core phase molecular sieve and a shell layer molecular sieve. The shell layer molecular sieve has a greater average pore diameter than the core phase molecular sieve. The porous shell layer molecular sieve having the greater pore diameter can protect the internal functioning micropores from being blocked, so that a resonant frequency f.sub.0 of a same volume of molecular sieve can be reduced, the bass effect and performance stability are significantly improved.

A process is presented for the removal of contaminants like oxygenates from hydrocarbons. The contaminant oxygenates are removed from hydrocarbons that may be feed to cracking units. A crude feed stream is fed to a water wash column along with water to remove oxygenates and is subsequently treated with an adsorbent to effectively remove all the oxygenates from the crude hydrocarbon. A regenerant medium from a naphtha hydrotreating unit is used to regenerate the adsorbent.