公开(公告)号：US20140090433A1

公开(公告)日：2014-04-03

申请号：US14098496

申请日：2013-12-05

Applicant: STAMICARBON B.V.

Inventor： Jozef Hubert MEESSEN ,  Pantelis ORFANIDIS

IPC: C05C9/00

CPC classification number: C05C3/00 ,  B01D53/54 ,  B01D53/58 ,  B01D53/80 ,  B01D2251/506 ,  B01D2257/406 ,  B01D2257/70 ,  C01C1/12 ,  C01C1/22 ,  C05C3/005 ,  C05C9/00 ,  C07C273/16

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.

Abstract translation: 本发明涉及通过使所述气流与硫酸水溶液接触从气流中回收尿素灰尘和氨的方法，从而形成硫酸铵和尿素的酸溶液，其特征在于将酸溶液浓缩至 熔体包含少于5重量％的水，该熔体随后转移到包含尿素和硫酸铵的固体颗粒中。

公开(公告)号：US20170137330A1

公开(公告)日：2017-05-18

申请号：US15421265

申请日：2017-01-31

Applicant: Stamicarbon B.V.

Inventor： Jozef Hubert MEESSEN ,  Pantelis ORFANIDIS

IPC: C05C3/00 ,  B01D53/80 ,  B01D53/58 ,  B01D53/54 ,  C01C1/22 ,  C07C273/16

CPC classification number: C05C3/00 ,  B01D53/54 ,  B01D53/58 ,  B01D53/80 ,  B01D2251/506 ,  B01D2257/406 ,  B01D2257/70 ,  C01C1/12 ,  C01C1/22 ,  C05C3/005 ,  C05C9/00 ,  C07C273/16

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.

公开(公告)号：US20160362360A1

公开(公告)日：2016-12-15

申请号：US15246334

申请日：2016-08-24

Applicant: Stamicarbon B.V.

Inventor： Johannes Henricus MENNEN ,  Jozef Hubert MEESSEN

IPC: C07C273/04 ,  B01D5/00 ,  B01D47/00 ,  B01J10/00

CPC classification number: C07C273/04 ,  B01D5/006 ,  B01D5/009 ,  B01D47/00 ,  B01J10/00 ,  B23P15/26 ,  Y10T29/49352

Abstract: Disclosed is a plant for the production of urea. The plant comprises conventional sections for synthesis and recovery, for evaporation and condensation, for urea finishing, and for dust scrubbing. According to the invention, an additional evaporation and condensation loop is introduced from and to the dust scrubbing section. This loop results in a more favorable energy consumption of the plant.