Oxidation catalyst, especially for the preparation of methacryli

Details Oxidation catalyst, especially for the preparation of methacryli Oxidation catalyst, especially for the preparation of methacryli

1983-03-01

1984-12-18

Gantz, Delbert E.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

562534, 562535, B01J 2714, C07C 5116

Patent

active

044891709

ABSTRACT:
Oxidation catalysts which in addition to oxygen ions, with or without NH.sub.4.sup.+ ions, contain molybdenum, tungsten, phosphorus and antimony as basic components, in the atomic ratio Mo:W:P:Sb=12:0.1-3:0.1-4:0.1-3, and which are prepared in a conventional manner by combining molybdenum, phosphorus, antimony and tungsten compounds in aqueous solutions or suspensions, removing the water and calcining the residues, the combination being carried out at chloride ion concentrations of less than 0.3 mole per mole of molybdenum and in the presence of ions of monocarboxylic acids of 1 or 2 carbon atoms, dicarboxylic acids or hydroxycarboxylic acids, are particularly suitable for the gas phase oxidation of methacrolein to methacrylic acid.

REFERENCES:
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patent: 4305843 (1981-12-01), Krabetz et al.
patent: 4334116 (1982-06-01), Velenyi et al.
patent: 4335018 (1982-06-01), Franz et al.

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