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US 4,233,248 AGranted
Process for oxidation of methanol to formaldehyde with nitrous oxide
AssigneeE. I. Du Pont de Nemours and Company
InventorsV. N. Mallikarjuna Rao, Stanislaw B. Ziemecki
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Abstract
Formaldehyde is synthesized by continuously passing a gaseous mixture of methanol and nitrous oxide over a metallic silver-containing catalyst bed at a temperature of about 475 to about 675.degree. C.
Claims12
The process of making formaldehyde which comprises continuously passing, for a contact time of 0.001 to 0.2 second, a gaseous mixture of methanol and nitrous oxide in a methanol to nitrous oxide mole ratio of 0.5 to 4.0, over a metallic silver, metallic silver:
- gold alloy, or metallic silver:
- copper alloy catalyst bed which is either unsupported or supported and contains at least about 3 weight percent silver metal, wherein the silver alloy present contains at least 2.5 mole percent silver maintained at a temperature of 475.degree. to 675.degree. C.
Dependencies are inferred from the claim text.