HIGHLY HOMOGENOUS ZEOLITE PRECURSORS

摘要

Described herein are methods and compositions for zeolite synthesis. The methods and compositions involve modifying a colloidal silica sol with a metal compound and in the presence of a structure directing agent, followed by heating to form a zeolite. The methods and compositions result in rapid zeolite formation, even at reduced concentrations of structure directing agent.

主权项

1. A method of forming zeolites, the method comprising subjecting a colloidal silica sol modified with a metal bearing particle and in the presence of an SDA to a temperature of at least 100° C. for a time period of at least 0.1 hours and no more than 10 hours, wherein the SDA is a bromide, chloride, or hydroxide of an ammonium salt wherein the ammonium group is selected from tetramethylammonium, tetrapropylammonium, tetraethylammonium, tetrabutylammonium, tetrahexylammonium, tetraoctylammonium, tributylmethylammonium, triethylmethylammonium, trimethylphenylammonium, methyltripropylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, dimethyldodecylethylammonium, diethyldimethylammonium, or a combination thereof.