MOLECULAR SIEVE PRECURSORS AND SYNTHESIS OF MOLECULAR SIEVES

摘要

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.

主权项

1. A process for the catalytic reduction of nitrogen oxides, the process comprising:
contacting a gas comprising a nitrogen oxide with a zeolite, wherein the zeolite is prepared from 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.