Patent ID: 7112316

Claim:
A process for synthesizing a molecular sieve having a three dimensional microporous framework structure and a framework composition represented by an empirical formula of: (Al x Si 1−x )O 2 where Al and Si are framework elements present as tetrahedral oxide units, x has a value from 0 to about 0.5; the process comprising forming a reaction mixture comprising reactive sources of the framework elements, M and optionally R, where M is selected from the group consisting of alkali metals, alkaline earth metals and mixtures thereof, R is an organic templating agent selected from the group consisting of quaternary ammonium cations, amines and mixtures thereof; the reaction mixture having a composition expressed in terms of mole ratios of the oxides of: aM 2/n O:bR:Al 2 O 3 :cSiO 2 :dH 2 O where “a/c” has a value from 0 to about 4, “n” is the valence of M and has a value from about 1 to about 2, “b/c” has a value from 0 to about 4, “d/c” has a value of about 2 to about 200, and reacting the reaction mixture at reaction conditions which include a temperature of about 50° C. to about 200° C. for a period of about 4 hours to about 14 days to at least partially crystallize molecular sieve seed crystals and provide a seed crystal slurry; adding to the seed slurry, at growing conditions, nutrients (sources) to provide framework elements of the seed crystals thereby growing the seed crystals; carrying out the addition at a rate that essentially equals the crystal growth rate and for a time sufficient to produce the molecular sieve.