Tilton, Fallon, Lungmus & Chestnut
An absorbing solution for the removal of nitrogen oxide form a gas containing same
 Oxides of nitrogen can be removed efficiently from a gas containing such oxides of nitrogen by bringing said gas into contact with an aqueous solution containing an organic acid alkali salt and a salt of metal selected from the group consisting of Fe, Co, Ni, Cu and Mn in the presence of a sulfurous acid alkali salt. The efficiency for removing oxides of nitrogen is much improved by use of a polybasic acid alkali such as ethylenediamine tetracarboxylic acid alkali salt or nitrilo-tricarboxylic acid alkali salt as said organic acid alkali salt. 
Kureha Kagaku Kogyo Kabushiki Kaisha
Y B B
Y02A B01D B01D
additional inventional inventional
Shigeru Tadashi Tetsuya Koji
Saitoh Nakamura Watanabe Konno