The invention provides methods and compositions for precursors and for the synthesis of zeolites. The invention makes use of intimately homogeneous precursors which avoid the formation of a difficult to work with gel stage in zeolite formation. This allows for the synthesis of zeolite in a much shorter period of time and with much lower amounts of structure directing agents.

The invention provides methods and compositions for precursors and for the synthesis of zeolites. The invention makes use of intimately homogeneous precursors which avoid the formation of a difficult to work with gel stage in zeolite formation. This allows for the synthesis of zeolite in a much shorter period of time and with much lower amounts of structure directing agents.

Catalyst and use of the catalyst comprising a molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60.

Catalyst and use of the catalyst comprising a molecular sieve belonging to the ABC-6 framework family with disorder in the ABC stacking sequence essentially composed of double-six-ring periodic building units and having a mole ratio of silicon oxide to aluminum oxide from about 8 to about 60.

Provided is a method for producing zeolite having a controlled aluminum content, wherein the sodium hydroxide molar concentration of a zeolite synthesis mixture can be adjusted to adjust the aluminum content in synthesized CHA. The structure of the low aluminum-content CHA produced by the provided method does not collapse even after high-temperature hydrothermal treatment, and thus the catalytic activity of the CHA can be maintained. Moreover, by adjusting the aluminum content in the framework, the properties of the produced CHA significantly change, and thus the CHA can be applied to various fields.

A method for hydrocracking a hydrocarbon feedstock, the method comprising: contacting the hydrocarbon feedstock with a catalyst containing a nano-sized mesoporous zeolite composition under reaction conditions to produce a product stream containing at least 20 weight percent of hydrocarbons with 1-4 carbon atoms, wherein the nano-sized mesoporous zeolite composition is produced by a method that includes: mixing silica, a source of aluminum, and tetraethylammonium hydroxide to form an aluminosilicate fluid gel; drying the aluminosilicate fluid gel to form a dried gel mixture; subjecting the dried gel mixture to hydrothermal treatment to produce a zeolite precursor; adding cetyltrimethylammonium bromide (CTAB) to the zeolite precursor to form a templated mixture; subjecting the templated mixture to hydrothermal treatment to prepare a CTAB-templated zeolite; washing the CTAB-templated zeolite with distilled water; separating the CTAB-templated zeolite by centrifugation; and drying and calcining the CTAB-templated zeolites to produce a nano-sized mesoporous zeolite composition.

A peak intensity of a (004) plane is greater than or equal to 3 times a peak intensity of a (110) plane in an X-ray diffraction pattern obtained by irradiation of X-rays to a membrane surface of an AFX membrane.

A peak intensity of a (004) plane is greater than or equal to 3 times a peak intensity of a (110) plane in an X-ray diffraction pattern obtained by irradiation of X-rays to a membrane surface of an AFX membrane.

A method for hydrocracking a hydrocarbon feedstock, the method comprising: contacting the hydrocarbon feedstock with a catalyst containing a nano-sized mesoporous zeolite composition under reaction conditions to produce a product stream containing at least 20 weight percent of hydrocarbons with 1-4 carbon atoms, wherein the nano-sized mesoporous zeolite composition is produced by a method that includes: mixing silica, a source of aluminum, and tetraethylammonium hydroxide to form an aluminosilicate fluid gel; drying the aluminosilicate fluid gel to form a dried gel mixture; subjecting the dried gel mixture to hydrothermal treatment to produce a zeolite precursor; adding cetyltrimethylammonium bromide (CTAB) to the zeolite precursor to form a templated mixture; subjecting the templated mixture to hydrothermal treatment to prepare a CTAB-templated zeolite; washing the CTAB-templated zeolite with distilled water; separating the CTAB-templated zeolite by centrifugation; and drying and calcining the CTAB-templated zeolites to produce a nano-sized mesoporous zeolite composition.

A novel process is described for the preparation of a microporous crystalline solid, known as IZM-2 microporous solid or IZM-2 zeolite. This novel process consists of carrying out the synthesis of IZM-2 zeolite by conversion/transformation of a zeolite with structure type FAU in a fluorinated medium under hydrothermal conditions. In particular, said novel process consists of carrying out the synthesis of an IZM-2 zeolite in a fluorinated medium starting from a zeolite with structure type FAU used as the source of silicon and aluminium and a specific organic molecule or template comprising two quaternary ammonium functions, namely 1,6-bis(methylpiperidinium)hexane dihydroxide.