Process for purifying combustion plant flue gases which...

Details Process for purifying combustion plant flue gases which... Process for purifying combustion plant flue gases which...

C - Chemistry, Metallurgy

01

B

C01B 17/88 (2006.01) B01D 53/50 (2006.01) B01D 53/86 (2006.01) C01B 17/76 (2006.01) B01D 53/36 (1990.01)

Patent

CA 2122321

ABSTRACT OF THE DISCLOSURE The invention relates to an advantageous further development of a process for purifying flue gases which contain oxides of nitrogen and sulphur from a combustion plant by selective catalytic reduction of the nitrogen oxides, subsequent catalytic oxidation of sulphuric dioxide with oxygen to give sulphur trioxide and washing the sulphur trioxide out of the flue gases as aqueous sulphuric acid. The further development according to the invention relates to concentrating the aqueous sulphuric acid to more than 95 wt. % strength sulphuric acid.

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