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US 9,174,849 B2Granted
Molecular sieve precursors and synthesis of molecular sieves
AssigneeBASF SE
InventorsAhmad Moini, Saeed Alerasool, Subramanian Prasad
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Abstract
Molecular sieves, improved methods for their synthesis, and catalysts, systems and methods of using these molecular sieves as catalysts in a variety of processes such as abating pollutants in exhaust gases and conversion processes are described. The molecular sieves are made using a tailored colloid including an alumina source, a silica source and a structure directing agent.
Claims29
A zeolite precursor comprising a solution comprising colloidal particles, wherein:
- each particle comprises alumina, silica, and a first structure directing agent;
- and
- the amounts of the alumina, silica, and the first structure directing agent are present in amount sufficient to form a zeolite having 8-ring pore openings and double-six ring secondary building units.
A method of making a zeolite having 8-ring pore openings and double-six ring secondary building units, the method comprising
- providing a solution of colloidal particles comprising alumina, silica, and a first structure directing agent, wherein the solution has a first pH;
- and
- performing a crystallization process comprising adjusting the pH of the solution and hydrothermally treating the solution to form a zeolite.
Dependencies are inferred from the claim text.