Process for removing cyanogen halides and phosgene from waste gases

摘要

Cyanogen halides and/or phosgene are removed from waste gases by bringing the waste gases into intimate contact with an aqueous solution of at least one amine of the formula NR3; in the formula, 1 or 2 of the radicals R represent an alkanol or alkylamine group having 2 or 3 carbon atoms in each case, where H and/or C1-C2-alkyl is bound to the nitrogen of the amine group, and the remaining groups R are H or C1-C4-alkyl.