CRUST CATALYST SPECIFICALLY DESIGNED FOR OXIDISING METHANOL TO FORMALDEHYDE AND METHOD OF PREPARING SAID CATALYST Russian patent published in 2010 - IPC B01J23/881 B01J37/02 B01J35/02 B01J37/08 C07C47/52 C07C45/38 

FIELD: chemistry.

SUBSTANCE: invention relates to a crust catalyst specifically designed for oxidising methanol to formaldehyde, a method of preparing the said catalyst and use of a catalyst for oxidising methanol to formaldehyde. A catalyst is described, which contains at least one coating layer on an inert, preferably essentially non-porous carrier, where the said coating layer, before removal of organic components b) and c), contains (a) oxides or precursor molybdenum and iron compounds transformed to corresponding oxides, where molar ratio Mo:Fe ranges from 1:1 to 5:1, and, if necessary, other metal or metal oxide compounds or precursor compounds transformed to corresponding oxides, (b) at least one organic binder material, preferably an aqueous dispersion of copolymers selected from vinylacetate/vinylaurate, vinylacetate/ethylene, vinylacetate/acrylate, vinylacetate/maleate, styrene/acrylate or mixtures thereof, and (c) at least one other component selected from a group consisting of SiO₂ sol or its precursor, Al₂O₃ sol or its precursor, ZrO₂ sol or its precursor, TiO₂ sol or its precursor, liquid glass, MgO, cement, monomers, oligomers or polymers of silanes, alkoxysilanes, aryloxysilanes, acryloxysilanes, aminosilanes, siloxanes or silanols. Described also is a method of preparing the catalyst and its preferred use in the method with a fixed bed catalyst.

EFFECT: obtaining an active, selective and wear-resistant catalyst.

35 cl, 4 ex,1 dwg