Patent ID: 7582278
Filing Date: 2009-09-01
Classification: B01J,C01B

Abstract:
1. A microporous crystalline zeolite material having, in the calcined state and in the absence of defects in the crystal lattice thereof, manifested by the presence of silanols, an empirical formula in which M is selected from among H X is at least one chemical element in oxidation state +3; Y is at least one chemical element in oxidation state +4, which is different from Si, x takes a value of between 0 and 0.2 inclusive, y takes a value of between 0 and 0.1 inclusive, and in that the material, as it is synthesised, has an X-ray diffraction pattern with at least the values of angle 2θ (degrees) and relative intensities (I/I where I 0 is the intensity of the strongest peak which is assigned a value of 100 w is a weak relative intensity of between 0 and 20%, m is a medium relative intensity of between 20 and 40%, s is a strong relative intensity of between 40 and 60%, vs is a very strong relative intensity of between 60 and 100%.