[12] Patent
[11] Patent No.:GC0009252  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/140707
Date of the Decision to Grant the Patent:02/Dec/2018

[21] Application No.:GC 2010-16662

[22] Filing Date:18/9/2010

[30] Priority:

[33] State [32] Priority date [31] Priority No.
EP
16/9/2009
09170447.8

[72] Inventors:1- MEESSEN Jozef Hubert،2- ORPHANIDES Pan

[73] Owner: DSM IP Assets B.V., Het Overloon 1, HEERLEN 6411 TE, Netherlands

[74] Agent: Suleiman I. Al-Ammar Law Office

  

 

  

[51]IPC:
Int. Cl.7: C01C1/12; C05C3/00; C05C9/00; C05G3/00; C07C273/16

[56] Cited Documents:

-DE 101 33 935 A1 (SKN STICKSTOFFNERKEPIESTERITZ GMBH)30 January 2003
-WO 2006/111331 A (DSM IP ASSETS B.V.)26 October 2006
-WO 01/51429 A (SKN STICKSTOFFWERKEPIESTERITZ GMBH) 19 July 2001
-US 3 928 015 A (SIEGEL MILTON R ET AL)23 December 1975
 
Examiner: Saja Mohammed AlHassan

[54] REMOVAL OF UREA AND AMMONIA FROM EXHAUST GASES
[57] Abstract: The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt% of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate
No. of claims: 7     No. of figures: 3


 

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