CATALYST FOR OXIDISING METHANOL TO FORMALDEHYDE Russian patent published in 2010 - IPC B01J23/881 B01J23/10 B01J37/04 C07C47/52 

FIELD: chemistry.

SUBSTANCE: described is a catalyst for oxidising methanol to formaldehyde which contains catalyst Fe₂(MoO₄)₃/MoO₃ mixtures in which the atomic ratio Mo/Fe ranges from 1.5 to 5, and a compound of cerium, molybdenum and oxygen in amount ranging from 0.1 to 10 wt % with respect to pure cerium. Described is a multilayer catalyst layer formed using the above described catalyst. Described is a method of preparing a catalyst, involving a) mixing a suspension obtained through precipitation of a Fe₂(MoO₄)₃/MoO³ mixture in which the ratio Mo/Fe ranges from 1.5 to 5, from a solution of a soluble iron (III) salt mixed with a solution of a molybdate of an alkali metal or ammonia with an aqueous suspension obtained from reacting hot molybdenum trioxide and cerium (III) carbonate in atomic ratio Mo/Ce ranging from 1.5 to 2.1 until generation of CO₂ stops, b) dilution, precipitation, filtration an washing the residue converted to a suspension after that by stirring before mixing with a suspension of the product of reacting molybdenum trioxide with cerium carbonate, c) formation of a dry mixture or paste thereof in form of granules and d) calcination thereof at temperature ranging from 450 to 600°C. A method is described for oxidising methanol using the above described catalyst.

EFFECT: increased stability of the catalyst layer.

15 cl, 2 tbl, 5 ex