Method for preparing a catalyst for oxidation of methanol to formaldehyde
AssigneeSud-Chemie Catalysts Italia S.R.L.
InventorsEsterino Conca, Carlo Rubini, Marcello Marchi
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Abstract
Process for preparing a catalyst for the oxidation of methanol to formaldehyde, comprising reacting iron powder and molybdenum trioxide in a Mo/Fe ratio from 1.5 to 5 in an aqueous suspension at temperatures from 20 to 100° C., and subsequently, optionally simultaneously, oxidizing the mixture with an oxidizing agent in a quantity equal to, or greater than the quantity required for the oxidation of the ferrous ion to ferric ion and to oxidize the molybdenum to the valence state 6.
Claims9
A process for preparing a catalyst for the oxidation of methanol to formaldehyde, comprising reacting iron powder and molybdenum trioxide in a Mo/Fe ratio from 1.5 to 5 in an aqueous suspension at temperatures from 20 to 100° C., and subsequently, optionally simultaneously, oxidizing the mixture with an oxidizing agent in a quantity equal to, or greater than the quantity required for the oxidation of the ferrous ion to ferric ion and to oxidize the molybdenum to the valence state 6.
A catalyst for oxidizing methanol to formaldehyde, comprising Fe2 (MoO4)3/MoO3 mixtures in which the Mo/Fe ratio is comprised from 1.5 to 5, free from anions of iron salts and with a content of impurities from alkali metals ions and/or ammonium ion lower than 40 ppm.
Dependencies are inferred from the claim text.