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1. (WO2018122379) METHOD FOR PROCESSING A GAS STREAM COMPRISING UREA DUST AND AMMONIA

Pub. No.:    WO/2018/122379    International Application No.:    PCT/EP2017/084819
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sat Dec 30 00:59:59 CET 2017
IPC: C01C 1/12
B01J 2/00
C01C 1/242
C05C 1/02
C05C 3/00
C07C 273/16
Applicants: YARA INTERNATIONAL ASA
Inventors: VOLKE, Howard
VAN BELZEN, Ruud
WINNE, Erika
Title: METHOD FOR PROCESSING A GAS STREAM COMPRISING UREA DUST AND AMMONIA
Abstract:
The present invention provides a method for processing a gas stream comprising urea dust and ammonia, comprising the steps of: (a) separating said ammonia from said urea dust, (b) converting said urea dust into an aqueous urea solution, (c) converting said ammonia into an aqueous ammonium sulphate solution, (d) mixing said aqueous urea solution and said aqueous ammonium sulphate solution, thereby obtaining a urea ammonium sulphate solution, and optionally, concentrating said aqueous urea solution, said aqueous ammonium sulphate solution, and/or said urea ammonium sulphate solution.