Title:
水溶液からアンモニア及び二酸化炭素を分離する方法
Document Type and Number:
Japanese Patent JP5753170
Kind Code:
B2
Abstract:
The present invention relates to a method for contemporaneously recovering ammonia and carbon dioxide from an aqueous solution thereof, possibly comprising their condensates, in a synthesis process of urea, characterized in that it comprises a hydrophobic microporous membrane distillation phase of an aqueous solution comprising ammonia, carbon dioxide and their saline compounds or condensates, said distillation being carried out at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 20 MPa absolute, with the formation of a residual aqueous solution, possibly comprising urea, and a gaseous permeate stream, comprising ammonia, carbon dioxide and water. The present invention also relates to an apparatus for effecting the above method and a production process of urea which comprises the above method.
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Inventors:
Kasara Paolo
Gianazza Alessandro
Gianazza Alessandro
Application Number:
JP2012528281A
Publication Date:
July 22, 2015
Filing Date:
September 01, 2010
Export Citation:
Assignee:
SAIPEM S.P.A.
International Classes:
C01C1/10; B01D61/36; C01B32/40; C01B32/50; C07C273/04; C07C273/16; C07C275/02
Domestic Patent References:
| JP2004148208A | ||||
| JP2000509329A | ||||
| JP2012515131A |
Foreign References:
| EP1925355A1 | ||||
| WO2001004085A1 | ||||
| WO2008141832A1 | ||||
| US5670053 | ||||
| WO1998013124A1 |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Atsushi Hakoda
Kenji Asai
Kazuo Yamazaki
Satsuki Ichikawa
Shimura
Sadao Kumakura
Atsushi Hakoda
Kenji Asai
Kazuo Yamazaki
Satsuki Ichikawa
Shimura