B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/56 (2006.01) B01D 53/86 (2006.01)
Patent
CA 2678079
The invention relates to a method for preparing a reducing agent composition, which is used in the selective catalytic reduction of nitrogen oxides and which contains from 20 to 40 % by weight of urea, from 20 to 40 % by weight of ammonium formate, and water. The composition is prepared by adding urea to the aqueous solution of ammonium formate that is prepared in situ, and by preparing the said aqueous solution of ammonium formate using, as starting materials, a source of ammonium, a source of formate, and water.
L'invention porte sur un procédé de préparation d'une composition d'agent réducteur, qui est utilisé dans la réduction catalytique sélective d'oxydes d'azote et qui contient de 20 à 40 % en poids d'urée, de 20 à 40 % en poids de formiate d'ammonium, et de l'eau. La composition est obtenue par addition d'urée à la solution aqueuse de formiate d'ammonium qui est préparée in situ, et par préparation de ladite solution aqueuse de formiate d'ammonium à l'aide, comme matières de départ, d'une source d'ammonium, d'une source de formiate et d'eau.
Arvola Jouko
Harma Timo
Hatala Eero
Maatta Lauri
Nissinen Timo
Gowling Lafleur Henderson Llp
Kemira Oyj
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