Method for recovering denitrating catalyst

Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...

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423239, 502 27, 502515, 502516, B01J 3862, B01J 2392, B01J 2120, C01B 2100

Patent

active

046159916

ABSTRACT:
A method for recovering a denitrating catalyst which is characterized by washing, with an aqueous oxalic acid solution, the used tungsten-titania or the tungsten-titania-vanadium denitrating catalyst which dust components have adhered to or have accumulated on and in which an SO.sub.2 -oxidizing power has thus risen; impregnating the catalyst with a tungsten compound; and drying and calcining the thus treated catalyst.

REFERENCES:
patent: 2380731 (1945-07-01), Drake et al.
patent: 4522928 (1985-06-01), McVicker et al.

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