Patent ID: 6533923
Filing Date: 2003-03-18
Classification: B01J,C01B,C07C,C10G

Abstract:
A crystallized phyllosilicate having:a) the general chemical formula (per half-lattice) C(2(3âˆ’tâˆ’y)+xâˆ’y)/mm+(Si4âˆ’xAlx)(MgtAly&square;3âˆ’tâˆ’y)O10(OH)2âˆ’zFz,nH2O where &square; represents an unoccupied octahedral cavity, C is the compensation cation taken from a reaction medium or a cation introduced by at least one post-synthesis ion exchange process, selected from the group consisting of the cations of elements from groups IA, IIA, and VIII of the periodic table, the cations of rare earth elements having an atomic number of 57 to 71 inclusive, the ammonium cation and, the organic cations containing nitrogen, m is the valence of the cation C, t is a number ranging between 0 and 3, x is a number greater than 0 and less than or equal to 1, y is a number greater than 0 and less than or equal to 2, z is a number greater than 0 and less than or equal to 2, n is a real positive number and not zero, and b) an X-ray diffraction diagram characterized by the presence of the following rays: one or more rays corresponding to a value of d060 equal to: 1.52Â±0.01Ã—10âˆ’10m, attributable to the trioctahedral character, 1.50Â±0.01Ã—10âˆ’10m, attributable to the di-trioctahedral character, 1.49Â±0.01Ã—10âˆ’10m, attributable to the dioctahedral character, and at least one reflection 001 such that d001 is between 10.1 and 17.0Ã—10âˆ’10m.