公开(公告)号：EP1918274A1

公开(公告)日：2008-05-07

申请号：EP06022990.3

申请日：2006-11-04

Applicant: UREA CASALE S.A.

Inventor： Zardi, Federico ,  Sticchi, Paolo ,  Brunengo, Paolo

IPC: C07C273/12

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

Abstract: 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 carbamate 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).

Abstract translation: 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：EP1752447A1

公开(公告)日：2007-02-14

申请号：EP05017376.4

申请日：2005-08-10

Applicant: UREA CASALE S.A.

Inventor： Brunengo, Paolo

IPC: C07C273/12 ,  C07D251/60

CPC classification number: C07D251/60 ,  C07C273/12

Abstract: A process for the integrated production of urea and melamine synthesized from at least part of said urea, comprising the steps of:
- carrying out a urea synthesis in a first urea synthesis reactor (16), fed with ammonia and carbon dioxide, obtaining a reaction mixture comprising urea and ammonium carbamate,
- carrying out melamine synthesis, with formation of off-gas comprising ammonia and carbon dioxide,
- carrying out a further urea synthesis in a second urea synthesis reactor (28), fed with said off-gas, with production of a respective reaction mixture comprising urea and ammonium carbamate,
- feeding said reaction mixture produced by said first reactor (16) and said reaction mixture produced by said second reactor (28) to a urea recovery unit (18), obtaining urea and an ammonium carbamate aqueous solution,
- feeding said ammonium carbamate aqueous solution obtained in said recovery unit (18) to said second urea synthesis reactor (28).

Abstract translation: 一种用于从至少部分所述尿素合成的尿素和三聚氰胺的综合生产方法，包括以下步骤： - 在第一尿素合成反应器（16）中进行尿素合成，供给氨和二氧化碳，获得反应 混合物，其包含尿素和氨基甲酸铵， - 进行三聚氰胺合成，形成包含氨和二氧化碳的废气， - 在供给所述废气的第二尿素合成反应器（28）中进一步进行尿素合成， 生产包含尿素和氨基甲酸铵的各自的反应混合物，将由所述第一反应器（16）产生的所述反应混合物和由所述第二反应器（28）产生的所述反应混合物输送到尿素回收单元（18），得到尿素和 氨基甲酸铵水溶液， - 将在所述回收单元（18）中获得的所述氨基甲酸铵水溶液进料到所述第二尿素合成反应器（28）。

公开(公告)号：EP1719755A1

公开(公告)日：2006-11-08

申请号：EP05009761.7

申请日：2005-05-04

Applicant: UREA CASALE S.A.

Inventor： Zardi, Federico ,  Sticchi, Paolo ,  Brunengo, Paolo

IPC: C07C273/04

CPC classification number: C07C273/04

Abstract: 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.

Abstract translation: 一种由氨和二氧化碳生产尿素的方法，其中在尿素合成段中获得的包含尿素，氨基甲酸铵和氨的水溶液的一部分在预定介质压力下操作的处理段中解离，以回收 氨基甲酸铵和其中所含的氨的方法包括在上述解离步骤中得到的尿素水溶液在低压尿素回收段中分解的步骤。

公开(公告)号：EP1752447B1

公开(公告)日：2010-11-10

申请号：EP05017376.4

申请日：2005-08-10

Applicant: UREA CASALE S.A.

Inventor： Brunengo, Paolo

IPC: C07C273/12 ,  C07D251/60

CPC classification number: C07D251/60 ,  C07C273/12

公开(公告)号：EP1918273A1

公开(公告)日：2008-05-07

申请号：EP06022991.1

申请日：2006-11-04

Applicant: UREA CASALE S.A.

Inventor： Zardi, Federico ,  Sticchi, Paolo ,  Brunengo, Paolo

IPC: C07C273/04

CPC classification number: C07C273/04

Abstract: 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.

Abstract translation: 一种由氨和二氧化碳生产尿素的方法，其中在尿素合成段中获得的包含尿素，氨基甲酸铵和氨的水溶液的一部分在预定介质压力下操作的处理段中解离，以回收 氨基甲酸铵和其中所含的氨的方法包括以下步骤：将由上述解离步骤产生的尿素水溶液在低压尿素回收部分中分解，并使用至少部分冷凝蒸汽，通过间接热 在包含尿素，氨基甲酸铵和氨的第二部分的高压汽提装置中，作为用于在包含尿素，氨基甲酸铵和氨的第一部分的水溶液中解离的加热流体， 压力处理部。

公开(公告)号：EP1533018A1

公开(公告)日：2005-05-25

申请号：EP03025219.1

申请日：2003-11-05

Applicant: UREA CASALE S.A.

Inventor： Brunengo, Paolo

IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  C01C1/02

CPC classification number: B01D53/56 ,  B01D53/8625 ,  C01C1/086

Abstract: A method for the removal of nitrogen oxides contained in combustion flue gas through treatment with gaseous ammonia, in which the gaseous ammonia is generated in situ by hydrolysis reaction of an aqueous urea solution (L4) whereby the ammonia generated by the hydrolysis is accumulated in gaseous state, under pressure, in an accumulator (L5).

Abstract translation: 一种通过用气态氨处理除去燃烧烟道气中的氮氧化物的方法，其中通过尿素水溶液（L4）的水解反应原位产生气态氨，由此水解产生的氨被积聚在气态 状态，在压力下，在蓄能器（L5）中。