Arsenic-resistant mixed oxide catalyst and process for producing

Details Arsenic-resistant mixed oxide catalyst and process for producing Arsenic-resistant mixed oxide catalyst and process for producing

1990-06-21

1992-05-12

Shine, W. J.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502248, 502312, B01J 2104, B01J 2106, B01J 2322, B01J 2328

Patent

active

051127946

ABSTRACT:
In an arsenic resistant mixed oxide catalyst and a process for producing the same, oxides of at least the metals vanadium and molybdenum are provided, especially for reducing nitrogen oxides in flue gases in the presence of a reducing agent such as ammonia and carbon monoxide. A MoO.sub.3 phase and at least one oxygen-rich mixed oxide phase such as V.sub.9 Mo.sub.6 O.sub.40 is at least partly converted into a mixed oxide phase being poorer in oxygen such as a V.sub.9 Mo.sub.4 O.sub.25 phase, for increasing arsenic resistance.

REFERENCES:
patent: 4071601 (1978-01-01), Shiraishi et al.
patent: 4925825 (1990-05-01), Tachi et al.
Magazine `Surface Technology`, 9(1979), pp. 195-202, "Studies on the Heterogeneous Oxidation of 1-Butene Over V.sub.2 O.sub.5 -MoO.sub.3 Catalyst" by K. M. ABD El-Salaan and E. A. Hassan.

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