US 12,378,505 B2
Additive for cleaning SCR systems
Volker Knöthig, Weilheim in Oberbayern (DE); Alex Lange, Fürholzen (DE); and Sergej Pawlitschek, Munich (DE)
Assigned to TUNAP GMBH & CO. KG, Wolfratshausen (DE)
Appl. No. 18/576,668
Filed by TUNAP GMBH & CO. KG, Wolfratshausen (DE)
PCT Filed Jul. 4, 2022, PCT No. PCT/EP2022/068471
§ 371(c)(1), (2) Date Jan. 4, 2024,
PCT Pub. No. WO2023/280786, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 21883593 (EP), filed on Jul. 5, 2021.
Prior Publication US 2024/0368504 A1, Nov. 7, 2024
Int. Cl. C11D 7/50 (2006.01); B01D 53/94 (2006.01); C11D 1/46 (2006.01); C11D 1/52 (2006.01); C11D 1/65 (2006.01); F01N 3/20 (2006.01)
CPC C11D 7/5013 (2013.01) [B01D 53/9418 (2013.01); C11D 7/5022 (2013.01); F01N 3/2066 (2013.01); B01D 2251/2067 (2013.01); B01D 2257/404 (2013.01); B01D 2258/012 (2013.01); C11D 1/46 (2013.01); C11D 1/52 (2013.01); C11D 1/652 (2013.01); C11D 7/5086 (2013.01); C11D 7/5095 (2013.01); F01N 3/206 (2013.01); F01N 3/208 (2013.01); F01N 2430/04 (2013.01); F01N 2550/05 (2013.01); F01N 2610/01 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1453 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of using a polar solvent as an additive to a solution containing a component that releases ammonia at above 200° C. for removing deposits or impurities in a selective catalytic reduction system, wherein the polar solvent has a boiling point at 101.3 kPa of at least 140° C.