公开(公告)号：EP2086928B1

公开(公告)日：2010-07-28

申请号：EP07818804.2

申请日：2007-10-09

申请人： Urea Casale S.A.

发明人： ZARDI, Federico ,  STICCHI, Paolo ,  BRUNENGO, Paolo

IPC分类号： C07C273/04

CPC分类号： C07C273/04

公开(公告)号：EP2094652B1

公开(公告)日：2013-12-04

申请号：EP07818806.7

申请日：2007-10-09

申请人： UREA CASALE S.A.

发明人： ZARDI, Federico ,  STICCHI, Paolo ,  BRUNENGO, Paolo

IPC分类号： C07C273/12

CPC分类号： C07D251/62 ,  B01J19/245 ,  B01J2219/24 ,  C07C273/12 ,  C07C273/16 ,  Y02P20/125 ,  Y02P20/582

公开(公告)号：EP1863758A2

公开(公告)日：2007-12-12

申请号：EP05806779.4

申请日：2005-11-15

申请人： UREA CASALE S.A.

发明人： ROMITI, Domenico ,  STICCHI, Paolo

IPC分类号： C07C273/04 ,  B01J10/00 ,  B01J19/24

CPC分类号： C07C273/04 ,  B01J2219/00006 ,  B01J2219/00103 ,  B01J2219/00108 ,  B01J2219/182 ,  B01J2219/185 ,  Y02P20/142

摘要： A process for urea production from ammonia and carbon dioxide, made to react at a predetermined high pressure in an appropriate synthesis reactor (112), from the reaction between NH3 and C02 being obtained a reaction mixture comprising urea, ammonium carbamate and free ammonia in aqueous solution, from which a recovery of ammonium carbamate and ammonia is carried out with their subsequent recycle to the synthesis reactor (112), said recovery from the reaction mixture taking place through operative steps of decomposition of the ammonium carbamate into NH3 and CO2 and of their stripping and a subsequent operative step of their recondensation into ammonium carbamate that is recycled to the synthesis reactor, the said reaction mixture obtained from the reaction between ammonia and carbon dioxide being pumped to the operative steps of decomposition and stripping.

公开(公告)号：EP1863758B1

公开(公告)日：2012-06-13

申请号：EP05806779.4

申请日：2005-11-15

申请人： UREA CASALE S.A.

发明人： ROMITI, Domenico ,  STICCHI, Paolo

IPC分类号： C07C273/04 ,  B01J10/00 ,  B01J19/24

CPC分类号： C07C273/04 ,  B01J2219/00006 ,  B01J2219/00103 ,  B01J2219/00108 ,  B01J2219/182 ,  B01J2219/185 ,  Y02P20/142

摘要： A process for urea production from ammonia and carbon dioxide, made to react at a predetermined high pressure in an appropriate synthesis reactor (112), from the reaction between NH3 and C02 being obtained a reaction mixture comprising urea, ammonium carbamate and free ammonia in aqueous solution, from which a recovery of ammonium carbamate and ammonia is carried out with their subsequent recycle to the synthesis reactor (112), said recovery from the reaction mixture taking place through operative steps of decomposition of the ammonium carbamate into NH3 and CO2 and of their stripping and a subsequent operative step of their recondensation into ammonium carbamate that is recycled to the synthesis reactor, the said reaction mixture obtained from the reaction between ammonia and carbon dioxide being pumped to the operative steps of decomposition and stripping.

公开(公告)号：EP2094652A1

公开(公告)日：2009-09-02

申请号：EP07818806.7

申请日：2007-10-09

申请人： UREA CASALE S.A.

发明人： ZARDI, Federico ,  STICCHI, Paolo ,  BRUNENGO, Paolo

IPC分类号： C07C273/12

CPC分类号： C07D251/62 ,  B01J19/245 ,  B01J2219/24 ,  C07C273/12 ,  C07C273/16 ,  Y02P20/125 ,  Y02P20/582

摘要： In an integrated process for urea and melamine production, urea is produced in a urea plant (10) comprising a high pressure urea synthesis section (11) from which an aqueous solution comprising urea, ammonium carbonate and ammonia is obtained and a urea recovery section (21) operating at low pressure, and melamine is produced in a melamine plant (40) wherein off-gases resulting as by-products of the melamine synthesis are discharged from said plant at a medium pressure and recycled to the high-pressure urea synthesis section (11).

摘要翻译： 在用于尿素和三聚氰胺生产的综合方法中，在包含高压尿素合成段（11）的尿素装置（10）中生产尿素，从其中获得包含尿素，氨基甲酸铵和氨的水溶液和尿素回收段（ 21），在三聚氰胺装置（40）中产生三聚氰胺，其中作为三聚氰胺合成的副产物产生的废气在中压下从所述设备排出并再循环到高压尿素合成段 （11）。

公开(公告)号：EP1776335A1

公开(公告)日：2007-04-25

申请号：EP05767515.9

申请日：2005-07-22

申请人： UREA CASALE S.A.

发明人： ROMITI, Domenico ,  STICCHI, Paolo

IPC分类号： C07C273/10 ,  C01C1/04 ,  C01B3/02

CPC分类号： C07C273/10 ,  C01B3/382 ,  C01B3/384 ,  C01B3/386 ,  C01B3/52 ,  C01B2203/0233 ,  C01B2203/0261 ,  C01B2203/0415 ,  C01B2203/0475 ,  C01B2203/068 ,  C01B2203/0816 ,  C01B2203/1241 ,  C01B2203/127 ,  C01B2203/142 ,  C01C1/0488 ,  Y02P20/52

摘要： A process for urea production comprises a first process step in which ammonia (7) and carbon dioxide (6) are obtained, subjecting natural gas (1) to reforming treatments (12, 14), and a second step of urea (8a) production from such ammonia (7) and from carbon dioxide, through a formation of a solution comprising urea and ammonium carbamate in a urea synthesis reactor (20) and a subsequent decomposition of the ammonium carbamate and. urea recovery, the process comprises the steps of: - treating combustion smokes (5) comprising carbon dioxide with an aqueous solution (9a) comprising a part (7b) of such ammonia (7), obtaining an aqueous ammonium carbamate solution (9c) ; - supplying the solution (9c) thus obtained to the second process step.

公开(公告)号：EP2086928A1

公开(公告)日：2009-08-12

申请号：EP07818804.2

申请日：2007-10-09

申请人： Urea Casale S.A.

发明人： ZARDI, Federico ,  STICCHI, Paolo ,  BRUNENGO, Paolo

IPC分类号： C07C273/04

CPC分类号： C07C273/04

摘要： A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the steps of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section and of using at least a part of the condensed steam, obtained by indirect thermal exchange with a second part of said aqueous solution comprising urea, ammonium carbmate and ammonia in a high- pressure stripping unit, as a heating fluid for the dissociation of the first part of the aqueous solution comprising urea, ammonium carbmate and ammonia in the medium-pressure treatment section.

公开(公告)号：EP1877368A1

公开(公告)日：2008-01-16

申请号：EP06742542.1

申请日：2006-04-06

申请人： UREA CASALE S.A.

发明人： ZARDI, Federico ,  STICCHI, Paolo ,  BRUNENGO, Paolo

IPC分类号： C07C273/04

CPC分类号： C07C273/04

摘要： A process for urea production from ammonia and carbon dioxide, in which part of the aqueous solution comprising urea, ammonium carbamate and ammonia obtained in a urea synthesis section is subjected to dissociation in a treatment section operating at a predetermined medium pressure for the recovery of the ammonium carbamate and of the ammonia contained in it, comprises the step of subjecting the urea aqueous solution resulting from the aforementioned dissociation step to decomposition in a low pressure urea recovery section.