Process for producing titanium-containing silicon oxide...

B - Operations – Transporting – 01 – J

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B01J 29/89 (2006.01) C01B 33/20 (2006.01) C01B 37/00 (2006.01) C07D 301/19 (2006.01) C07D 303/04 (2006.01) B01J 35/10 (2006.01)

Patent

CA 2438882

A method for preparing a specific titanium-containing silicon oxide catalyst having a specific average pore diameter, a specific pore diameter distribution and a specific pore volume-to-weight ratio, which comprises a first step of admixing and agitating a silica source, a titanium source and a ternary ammonium ion in a liquid state as a mold material, to form a solid containing catalyst components and the mold material, wherein the resulting mixture contains an alkali metal in an amount satisfying the following formula (II) or (III): alkali metal / titanium <= 3 (mol / mol) (II) or alkali metal/[NR1R2R3R4]+ <= 0.3 (mol/mol) (III), and a second step of removing the mold material from the solid formed in the first step.

La présente invention concerne un procédé de préparation d'un catalyseur spécifique à base d'oxyde de silicium contenant du titane, présentant un diamètre de pore moyen spécifique, une distribution des diamètres de pore spécifique, ainsi qu'un rapport volume de pore sur poids spécifique. La première étape de ce procédé consiste à mélanger et à agiter une source de silice, une source de titane et un ion ammonium ternaire à l'état liquide, sous forme de matière fondue, afin de produire un solide contenant des composants de catalyseur et la matière fondue. Le mélange résultant contient un métal alcalin, dans une quantité satisfaisant les formules (II) et (III) suivantes : métal alcalin/titane <= 3 (mol/mol) (II) ou métal alcalin/[NR?1¿R?2¿R?3¿R?4¿]?+¿ <= 0,3 (mol/mol) (III) La seconde étape de ce procédé consiste à retirer la matière fondue du solide produit dans la première étape.

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