Method of recycling spent flue gas denitration catalyst

Details Method of recycling spent flue gas denitration catalyst Method of recycling spent flue gas denitration catalyst

2011-05-17

2011-05-17

Johnson, Edward M (Department: 1736)

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

Regenerating or rehabilitating catalyst or sorbent

By heat

C502S514000, C502S515000

Reexamination Certificate

active

07943544

ABSTRACT:
The present invention provides a method of recycling a spent flue gas denitration catalyst and a method of determining a washing time of the spent flue gas denitration catalyst. The method of recycling the spent flue gas denitration catalyst includes physically removing solids deposited in the spent flue gas denitration catalyst, removing poisoning substances deposited in the spent flue gas denitration catalyst by washing the spent flue gas denitration catalyst with a washing liquid for a washing time determined by measuring the hydrogen ion concentration of the washing liquid and drying the resulting spent flue gas denitration catalyst.

REFERENCES:
patent: 3634497 (1972-01-01), Budke
patent: 4678557 (1987-07-01), Rodriguez et al.
patent: 6387836 (2002-05-01), Dörr et al.
patent: 10-2006-0076297 (2006-07-01), None

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