Method for production of a coated substrate with controlled surface characteristics
AssigneesEniricerche S.p.A., Enichem Synthesis S.p.A., Snamprogetti S.p.A.
InventorsGiuseppe Bellussi, Mario G. Clerici, Aldo Giusti, Franco Buonomo
Life of this patent
Estimating the term…
Abstract
A crystalline, porous, synthetic material is disclosed, together with its related preparation process. Such a material of zeolitic character, containing silicon, titanium and iron oxides, corresponds, in its calcined and anhydrous state, to the following empi rical formula pHFeO.sub.2.qTiO.sub.2.SiO.sub.2 wherein p has a value greater than zero and lower than or equal to 0.050, q has a value greater than zero and lower than or equal to 0.025, and the H.sup.+ of HFeO.sub.2 can be at least partly replaceable or replaced by cations.
Claims17
Process for preparing a synthetic crystalline and porous material having a zeolite nature, containing oxides of silicon, titanium and iron, having, in its calcined and anhydrous state the empirical formula:
- pHFeO.sub.2.qTiO.sub.2.SiO.sub.2
- wherein p has a value greater than zero and smaller than or equal to 0.050, and q has a value greater than zero and smaller than or equal to 0.025, the hydrogen of HFeO.sub.2 being at least partially substitutable by cations, said process comprising:
- reacting under hydrothermal conditions a source of silicon, a source of titanium, a source of iron and a nitrogenous organic base, with a SiO.sub.2 /Fe.sub.2 O.sub.3 molar ratio in the reaction mixture greater than 50, with a SiO.sub.2 /TiO.sub.2 molar ratio in the reaction mixture greater than 5, and with a H.sub.2 O/SiO.sub.2 molar ratio from 10 to 100, at a temperature from 120.degree. C. to 200.degree. C., at a pH from 9 to 14 and for a time from 1 hour to 5 days.
Dependencies are inferred from the claim text.