Process for preparing hydroxylamine from NOx-containing flue gases

摘要

PCT No. PCT/EP92/02381 Sec. 371 Date Apr. 21, 1994 Sec. 102(e) Date Apr. 21, 1994 PCT Filed Oct. 15, 1992 PCT Pub. No. WO93/08121 PCT Pub. Date Apr. 29, 1993.A process and device are disclosed for preparing hydroxylamine from NOx-containing flue gases. Nitrogen removal from the NOx-containing flue gases by absorption in an aqueous solution of FeII-EDTA and by desorption through vapor stripping of the NA from the thus obtained FeII(NO)-EDTA solution, with admixture of hydrogen, leading to the recovery of an NO/H2 gaseous mixture, is combined with hydroxylamine synthesis by catalytic reduction of NO with hydrogen.