Abstract: 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.

Abstract: This invention relates generally to a process to perform controlled alkaline and acid treatments on inorganic porous solids, yielding superior physico-chemical and catalytic properties, whereas the particle and crystal size is not negatively influenced. Accordingly, the solids obtained in this fashion can be easily recovered from the alkaline solution. The latter being problematic in the state of the art.

Abstract: The invention is broadly drawn to a process to introduce mesoporosity in faujasite zeolites with Si/Al<5 and unit cell sizes below 24.58 Angstrom by an inventive sequence of acid and base treatments, yielding superior physico-chemical and catalytic properties compared to the materials prepared according to the teachings known in the state of the art. Part of the invention relates to the acid step which is executed in the presence of a salt of which the anion is able to form multi-ligand complexes with aluminum, and of which a specific amount of cations are protonic (ca. 90% to 20% of the total cations with ?3<pK<6). The superior properties may be the combination of an enhanced mesoporosity with a higher Brønsted acidity, a higher microporosity, a higher mesoporosity, a higher crystallinity, and/or combinations hereof.

Abstract: A process of performing controlled alkaline treatments on inorganic porous solids, yielding superior physico-chemical and catalytic properties, whereby the particle and crystal size is not negatively influenced. The solids obtained from this process can be easily recovered from the alkaline solution.

Abstract: This invention relates generally to a process to perform controlled alkaline and acid treatments on inorganic porous solids, yielding superior physico-chemical and catalytic properties, whereas the particle and crystal size is not negatively influenced. Accordingly, the solids obtained in this fashion can be easily recovered from the alkaline solution. The latter being problematic in the state of the art.