Process for preparing a catalyst for the oxidation of methanol t

Details Process for preparing a catalyst for the oxidation of methanol t Process for preparing a catalyst for the oxidation of methanol t

1975-07-10

1976-09-28

Shine, W. J.

Compositions

X-ray or neutron shield

260603HF, B01J 2388

Patent

active

039830730

ABSTRACT:
A catalyst active in the oxidation of methanol to formaldehyde is prepared by forming a suspension of an amorphous precipitate by mixing an aqueous molybdate solution with an aqueous solution of a ferric salt, while maintaining an atomic ratio Mo/Fe of at least 1.5:1 in the mixture, heating the suspension at 70.degree.-100.degree.C for at least 30 minutes, washing the resulting precipitate with water to remove the soluble salts and at least a part of the excess of soluble molybdate not transformed into iron molybdate, thereby to ensure in the washed solid an atomic ratio Mo/Fe of from 1.5:1 to 1.7:1, and drying the washed solid at a temperature not exceeding 120.degree.C for a period of at least 30 minutes.
The catalyst consists of iron molybdate Fe.sub.2 (MoO.sub.4).sub.3 with an amount of free molybdenum trioxide ranging from zero to a value such that the atomic ratio Mo/Fe is from 1.5:1 to 1.7:1, and has a crystallinity degree of at least 90%.

REFERENCES:
patent: 3716497 (1973-02-01), Courty

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