METHOD OF PREPARING FORMALDEHYDE Russian patent published in 1997 - IPC

Abstract RU 2094421 C1

FIELD: chemical, petrochemical and other industries. SUBSTANCE: claimed method comprises passing initial reaction gas containing 6-12 % methanol, 4.5-7 % oxygen and the inert gas balance successively through several layers of catalyst substantially made of metal oxides. Reaction gas temperature at each bed inlet is maintained at 200-280 C. Oxygen is added to partially reacted bed at reaction gas to oxygen volumetric ratio of 1:(0.05-0.03) so that the oxygen concentration in reaction gas is 2-6.5 %. EFFECT: more efficient preparation method. 2 cl

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RU 2 094 421 C1

Authors

Makarenko M.G.

Daut V.A.

Majer V.V.

Zolotarskij I.A.

Martynenko E.P.

Dates

1997-10-27—Published

1995-09-11—Filed