Structure material ultra-large pore zeolite with network constituted by silicon and titanium oxides; their synthesis and use for selective oxidation of organic products.

摘要

STRUCTURE MATERIAL TYPE PORE ZEOLITE FORMED WITH ultralarge oxides of silicon and titanium RED: SYNTHESIS AND USE FOR ITS SELECTIVE OXIDATION OF ORGANIC. THIS IS A MATERIAL FORMED BY silicotitanates STRUCTURE CRISTALINA similar to the type zeolites MCM-41 typically contains IN HIS RED ATOMS TITANIUM AND CHANNELS pore structure WHOSE DIMENSIONS MEDIAS above 10 A WHAT YOU catalysing reactions in which INVOLVING SUCH AS BULKY organic molecules oxidize olefin epoxides and glycols, alcohols to ketones, thioethers to sulfoxides and sulfones, and phenol A catechol and hydroquinone and IF A1 INTRODUCE THE STRUCTURE MAY PREPARE CATALYST OXIDANTE bifunctional acid / BASE. TO ACHIEVE THIS PRODUCT IS PART OF A solution containing aqueous ION NR1R2R3R4 + AND OTHER CONTAINING AMMONIUM HYDROXIDE tetramethyl a silica source (PE AEROSILCO). ADDING after homogenisation MASSILICE, IT and power [PE TI (C2OH5) 4]. GEL RESULTING heated in an autoclave at a temperature between 80 and 200 C. The gel obtained by calcining TRIGGERED between 350 and 800 C. is used for catalytic oxidation.