Lane, Aitken, Dunner & Ziems
Method of removing nitrogen oxides from a gas as a salt of imidodisulfonic acid
 A method of removing nitrogen oxides from a gas containing nitrogen oxides and converting same to a salt of imidodisulfonic acid, wherein the gas containing nitrogen oxides is brought into contact with an aqueous solution which contains at least one ferrous salt and at least one sulfurous acid alkali salt to absorb the nitrogen oxides in solution in the form of imidodisulfonic acid alkali salts. 
Kureha Kagaku Kogyo Kabushiki Kaisha
B B C
B01D B01D C01C
inventional inventional inventional
Shigeru Tadashi Koji Tetsuya
Saitoh Nakamura Konno Watanabe