CATALYST FOR OXIDATION OF METHANOL TO FORMALDEHYDE AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2022 - IPC B01J35/10 B01J23/881 B01J37/03 C07C47/52 

FIELD: catalysts.

SUBSTANCE: present invention relates to a catalyst, a method for producing a catalyst, and to a method for oxidation of methanol to formaldehyde in the presence of said catalyst. Catalyst includes a mixture of Fe₂(MoO₄)₃/MoO₃ in the form of granules in a certain geometric shape, produced by tableting. Catalyst has a porous structure with a total pore volume of 0.15 to 0.35 cm³/g, wherein the proportion of mesopores with a radius of 50 to 100 nm is 30 to 86%, the proportion of macropores with a radius of 100 to 200 nm is 5.5 to 68%; a specific surface area of 4 to 10 m²/g and a mass ratio of MoO₃/Fe₂O₃ of 3.6 to 5.1 expressed as oxides. The catalyst is synthesised by deposition of solutions of a salt of trivalent iron and molybdenum salt at a mass ratio of MoO₃/Fe₂O₃ of 3.6 to 5.1 expressed as oxides. Deposition is performed at a temperature of 50 to 60°C and a pH at the level of 1.2 to 2.0, followed by maturation of the deposition at a constant pH in the above range, followed by filtering and washing of the deposition. After drying, the deposition is mixed with a lubricant, subjected to heat treatment at 250 to 330°C, tableted, followed by calcination at 460 to 500°C for 3 to 5 hours. Method for producing formaldehyde by oxidation of methanol includes passing a gas containing methanol and oxygen through the catalyst, where methanol and oxygen are supplied into a reactor at concentrations of 5 to 10% and 9 to 13%, respectively, the rest being nitrogen.

EFFECT: development of a catalyst with increased mechanical strength, wherein the high catalytic activity and selectivity of the catalyst are retained.

9 cl, 2 dwg, 4 tbl, 10 ex