| abstract |
Crystalline silicates having:n a) a certain specific X-ray powder diffraction pattern; b) a composition expressed in moles of the oxides: p(0.9 ± 0.3)M2/n0. p(a X 2 O 3 . b Y 2 O 3 ). SiO 2 , wherein M = H and alkali metal and/or alkaline earth metal, X = rhodium, chromium and/or scandium, Y = aluminium, iron and/or gallium,a>0.5,b>O,a+b=1,0<p<0.1 and n=the valency of M. n Process for the preparation of these silicates and process for carrying out chemical conversions using catalysts comprising the silicates. |