Abstract: Methods for introducing mesoporosity into zeolite materials that employ an acid pretreatment step are provided. By utilizing a non-acidic chelating agent during the acid treatment step, the zeolite material can be pretreated with a strong acid, often in higher concentrations or over shorter contact times, than had previously been contemplated. The resulting acid-treated mesoporous materials retain desirable properties, including Si/Al, UCS, and total mesopore and micropore volume. The ability to use a stronger acid without damaging the zeolite material results in a less expensive process capable of producing mesoporous zeolite materials suitable for a wide range of uses.

Abstract: Compositions and methods for preparing mesoporous and/or mesostructured materials from low Si/Al zeolites. Various embodiments described herein relate to preparation of mesoporous and/or mesostructured zeolites via a framework modification step followed by a mesopore introduction step.

Abstract: Compositions and methods for introducing mesoporosity into zeolitic materials employing sequential acid, surfactant, and base treatments are disclosed herein. Mesopores can be introduced into zeolitic materials, such as zeolites, by treatment with an acid and surfactant followed by treatment with a base. The resulting mesoporous zeolitic materials can have a total 20 to 135 ? diameter mesopore volume of at least 0.05 cc/g. Additionally, the resulting mesoporous zeolitic materials can have a total 0 to 20 ? micropore volume of at least 0.10 cc/g.

Abstract: Methods for introducing mesoporosity into zeolite materials that employ an acid pretreatment step are provided. By utilizing a non-acidic chelating agent during the acid treatment step, the zeolite material can be pretreated with a strong acid, often in higher concentrations or over shorter contact times, than had previously been contemplated. The resulting acid-treated mesoporous materials retain desirable properties, including Si/Al, UCS, and total mesopore and micropore volume. The ability to use a stronger acid without damaging the zeolite material results in a less expensive process capable of producing mesoporous zeolite materials suitable for a wide range of uses.

Abstract: Compositions and methods for preparing mesoporous and/or mesostructured materials from low Si/Al zeolites. Various embodiments described herein relate to preparation of mesoporous and/or mesostructured zeolites via a framework modification step followed by a mesopore introduction step.

Abstract: Compositions and methods for making stabilized mesoporous materials. Surfactant-treated mesoporous precursor materials can be heat-treated in the presence of steam and/or ammonia in a heat-treating environment. The steam and/or ammonia can be introduced into the heat-treating environment via in situ and/or ex situ sources. Such stabilized mesoporous materials can have increased structural stability.

Abstract: To control the pressure generated by the decomposition of quaternary ammonium hydroxides during the crystallization of molecular sieve materials at elevated temperatures, to levels below the mechanical limits of the equipment, the present invention substitutes halide salts of the same quaternary ammonium structure directing agent compound for some fraction of the hydroxide compound. In addition, because the quaternary ammonium hydroxides are generally more expensive than the corresponding halides, using a combination of the two reduces the cost of manufacturing the molecular sieve product.

Abstract: The present invention is directed towards methods for the cost-effective commercial manufacture of small crystal titanium-silicate molecular sieve products, toward a novel titano-silicate molecular sieve composition synthesized thereby, which the present inventors have termed “TS-PQ”, and toward uses of that molecular sieve composition as an oxidation catalyst.

Abstract: To control the pressure generated by the decomposition of quaternary ammonium hydroxides during the crystallization of molecular sieve materials at elevated temperatures, to levels below the mechanical limits of the equipment, the present invention substitutes halide salts of the same quaternary ammonium structure directing agent compound for some fraction of the hydroxide compound. In addition, because the quaternary ammonium hydroxides are generally more expensive than the corresponding halides, using a combination of the two reduces the cost of manufacturing the molecular sieve product.