公开(公告)号：US20250084032A1

公开(公告)日：2025-03-13

申请号：US18682550

申请日：2022-08-26

Applicant: Yara International ASA

Inventor： Lino Giovanni PORRO ,  Ruud VAN BELZEN ,  Patrice MALO ,  Sven KOHNKE ,  Werner RUNGGER ,  Klaus WEIGL ,  Vincent DUPONCHEL

IPC: C07C273/14 ,  B01D53/56

Abstract: A method for producing a SNCR/SCR solution, comprising the steps of: a) reacting ammonia and carbon dioxide in a high pressure section, thereby obtaining an aqueous composition comprising urea and ammonium salts; b) processing the aqueous composition obtained in step a), thereby obtaining a first aqueous solution comprising urea, and a second aqueous solution comprising ammonium salts; and c) diluting the second aqueous solution comprising ammonium salts obtained in step b) with a third aqueous solution, thereby producing the SNCR/SCR solution. The present disclosure also provides the use of an aqueous stream comprising ammonium salts from a urea-producing plant for producing a SNCR/SCR solution.