Porous crystalline material (zeolite itq-21), the...

C - Chemistry – Metallurgy – 01 – B

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C01B 39/48 (2006.01) B01J 29/035 (2006.01) B01J 29/04 (2006.01) B01J 29/70 (2006.01) C01B 37/00 (2006.01) C01B 37/02 (2006.01) C01B 39/06 (2006.01) C10G 11/02 (2006.01) C10G 11/05 (2006.01) C10G 29/20 (2006.01) C10G 47/16 (2006.01) C10G 47/20 (2006.01) C10G 50/00 (2006.01)

Patent

CA 2447448

A porous crystalline material (ITQ-21) which in its calcined form has the chemical composition X2O3 : n YO2 : m ZO2 wherein (n + m) is at least 5, X is a trivalent element, Z is Ge, Y is at least one tetravalent element other than Ge, and the ratio is Y/Z is at least 1, and displays the X-ray diffraction values given in Table 1, and a method of preparation of the material in the presence of fluoride ions and using N(16)-methylsparteinium as structure director agent; the material being useful in its acid form and in bifunctional catalyst form in processes of catalytic cracking, hydro-cracking and alkylation of aromatics.

L'invention porte sur une matière poreuse cristalline (ITQ-21) qui, sous forme calcinée, présente la composition chimique (1), dans laquelle (n+m) désigne au moins 5, X désigne un élément trivalent, Z désigne Ge, Y désigne au moins un élément tétravalent différent de Ge, et le rapport Y/Z est au moins de 1. La matière poreuse cristalline présente les valeurs de diffraction de rayons X que l'on trouve sur le tableau 1. L'invention porte également sur un procédé de préparation de la matière en présence d'ions de fluorure et grâce à N(16)-methylspartéine servant d'agent directeur de structure. La matière est utilisée sous forme acide et sous forme de catalyseur bifonctionnel dans des processus de craquage catalytique, d'hydrocraquage et d'alkylation d'aromatiques.

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