Preparation of a porous composite material based on EU-1...

Details Preparation of a porous composite material based on EU-1... Preparation of a porous composite material based on EU-1...

2011-04-12

2011-04-12

Wood, Elizabeth D (Department: 1732)

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

C502S062000, C502S063000, C502S064000, C502S074000

Reexamination Certificate

active

07923398

ABSTRACT:
A preparation process is described for a porous composite material formed from an amorphous core based on at least one silicon oxide on which crystals of EU-1 zeolite are dispersed, said process comprising 1) the impregnation of a solid comprising a silicon oxide and an aluminum oxide with an aqueous solution comprising a hexamethonium cation, 2) the hydrothermal treatment, 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*10−10*T3−48*10−8*T2+5*10−5*T−0.002] and less than or equal to 0.25*V, and is such that said solid is not in direct contact with it, 3) the drying then calcination of the solid from stage 2). The preparation a catalyst from said material for its use in the isomerization of C8aromatics is also described.

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Arnold A et al : “Dry-Gel Synthesis of Zeolites [A] EU-1 and [GA]EU-1” Microporous and Mesoporous Materials, Elsevier Science Publishing, New York, US vol. 67, No. 2-3 (Feb. 6, 2004) XP004485734.
Arnold A et al: “Insight Into the Dry-Gel Synthesis of Gallium-Rich Zeolite [GA]Beta” Microporous and Mesoporous Materials, Elsevier Science Publishing, New York, US vol. 62, No. 1-2, (Aug. 14, 2003) XP004441138.
Microporous and Mesoporous Materials 27 (1999) 95 106—“Preparation and catalytic testing of zeolite coatings on preshaped alumina supports” —N. van der Puil—pp. 95-106.

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