The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 2012
Filed:
Feb. 14, 2008
Jouko Arvola, Oulu, FI;
Timo Härmä, Espoo, FI;
Eero Hätälä, Oulu, FI;
Lauri Määttä, Oulu, FI;
Timo Nissinen, Ylöjärvi, FI;
Pentti Pekonen, Oulu, FI;
Jouko Arvola, Oulu, FI;
Timo Härmä, Espoo, FI;
Eero Hätälä, Oulu, FI;
Lauri Määttä, Oulu, FI;
Timo Nissinen, Ylöjärvi, FI;
Pentti Pekonen, Oulu, FI;
Kemira Oyj, Helsinki, FI;
Abstract
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 aqueous solution of ammonium formate using, as starting materials, a source of ammonium, a source of formate, and water.