Patent ID: 8158103
Filing Date: 2012-04-17
Classification: C01B

Abstract:
1. A process for preparing a microporous crystalline zeolite having a three-dimensional framework of at least AlO 2 and SiO 2 tetrahedral units and an empirical composition in the as synthesized and anhydrous basis expressed by an empirical formula of: where M represents sodium or a combination of potassium and sodium exchangeable cations, “m” is the mole ratio of M to (Al+E) and varies from about 0.05 to about 2, R is a singly charged propyltrimethylammonium cation, “r” is the mole ratio of R to (Al+E) and has a value of about 0.25 to about 2.0, E is an element selected from the group consisting of gallium, iron, boron and mixtures thereof, “x” is the mole fraction of E and has a value from 0 to about 1.0, “y” is the mole ratio of Si to (Al+E) and varies from greater than 8 to about 40 and “z” is the mole ratio of O to (Al+E) and has a value determined by the equation: and is characterized in that it has the x-ray diffraction pattern having at least the d-spacings and intensities set forth in Table A and is thermally stable up to a temperature of at least 600° C. and has a BET surface area of less than about 420 m where “a” has a value of about 0.05 to about 1.25, “b” has a value of about 1.5 to about 40, “c” has a value of 0 to about 1.0, “d” has a value of about 4 to about 40, “e” has a value of about 25 to about 4000.