Patent ID: 7923398
Filing Date: 2011-04-12
Classification: B01J,C01B,C07C,Y02P

Abstract:
1. A process for the preparation of a porous composite material formed from an amorphous core based on at least one silicon oxide and at least one aluminum oxide on which crystals of EU-1 zeolite are dispersed on the external surface of said core without a continuous and crystallized layer of EU-1 zeolite entirely covering said surface, said process comprising at least the following stages in succession: 1) impregnation and drying in at least one cycle of a reactive amorphous and porous solid comprising at least one silicon oxide and at least one aluminium oxide with at least one aqueous solution comprising at least one quaternary diammonium cation of formula [R 2) hydrothermal treatment, directly of resultant solid from stage 1) implemented in an autoclave of volume V (ml) under steam and at a temperature T comprised between 120 and 220° C., of said solid from stage 1), the quantity of water introduced beforehand into said autoclave being strictly greater than a volumetric quantity equal to V*[23.48*10 3) drying then calcination of the solid from stage 2) so as to obtain said porous composite material having a dispersed layer of EU-1 crystals on the amorphous core without a continuous and crystallized layer of EU-1 zeolite entirely covering the surface of the core.