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1. 发明授权

US07608735B2 Process for urea production and related plant 有权
标题翻译：尿素生产工艺及相关工厂
公开(公告)号：US07608735B2
公开(公告)日：2009-10-27
申请号：US11911461
申请日：2006-04-06
申请人： Federico Zardi , Paolo Sticchi , Paolo Brunengo
发明人： Federico Zardi , Paolo Sticchi , Paolo Brunengo
IPC分类号： C07C273/16 , 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.
摘要翻译：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得到的包含尿素，氨基甲酸铵和氨水的部分水溶液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。

2. 发明申请

US20100063321A1 Process for Urea Production and Related Plant 有权
标题翻译：尿素生产工艺及相关工厂
公开(公告)号：US20100063321A1
公开(公告)日：2010-03-11
申请号：US12513487
申请日：2007-10-09
申请人： Federico Zardi , Paolo Brunengo , Paolo Sticchi
发明人： Federico Zardi , Paolo Brunengo , Paolo Sticchi
IPC分类号： C07C273/04 , B01J10/00
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.
摘要翻译：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得到的包含尿素，氨基甲酸铵和氨水的部分水溶液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段中分解并使用至少一部分冷凝蒸汽，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与第二部分水溶液交换，所述加热流体用于在介质中包含尿素，氨基甲酸铵和氨的水溶液的第一部分的解离，压力处理部。

3. 发明申请

US20080219900A1 Process for Urea Production and Related Plant 有权
标题翻译：尿素生产工艺及相关工厂
公开(公告)号：US20080219900A1
公开(公告)日：2008-09-11
申请号：US11817186
申请日：2005-11-15
申请人： Domenico Romiti , Paolo Sticchi
发明人： Domenico Romiti , Paolo Sticchi
IPC分类号： B01J19/00 , C07C273/04
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 CO2 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.
摘要翻译：一种由氨和二氧化碳生产尿素的方法，其在合适的合成反应器（112）中以预定的高压反应，从NH 3和CO 2之间的反应得到包含尿素，氨基甲酸铵和游离氨水溶液的反应混合物，从其中进行氨基甲酸铵和氨的回收，随后再循环到合成反应器（112），所述从反应混合物中回收的物质发生通过氨基甲酸铵分解成NH 3和CO 2 2及其汽提的操作步骤和随后的再次还原成氨基甲酸铵的操作步骤，其被再循环到合成物将从氨和二氧化碳之间的反应获得的所述反应混合物泵送到分解和汽提的操作步骤。

4. 发明授权

US08383856B2 Process for urea production and related plant 有权
标题翻译：尿素生产工艺及相关工厂
公开(公告)号：US08383856B2
公开(公告)日：2013-02-26
申请号：US11817186
申请日：2005-11-15
申请人： Domenico Romiti , Paolo Sticchi
发明人： Domenico Romiti , Paolo Sticchi
IPC分类号： C07C273/04 , C07C273/14 , C07C275/02 , C01B21/12
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 CO2 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.
摘要翻译：由氨和二氧化碳制备的尿素在适当的合成反应器（112）中由NH 3和CO 2之间的反应在预定的高压下反应得到包含尿素，氨基甲酸铵和游离氨水溶液的反应混合物溶液，其中氨基甲酸铵和氨的回收率随后再循环到合成反应器（112）中，所述从反应混合物中回收，通过氨基甲酸铵分解成NH 3和CO 2以及它们的操作步骤进行汽提和随后的将其再缩合成氨基甲酸铵再循环到合成反应器中的操作步骤，将从氨和二氧化碳之间的反应获得的所述反应混合物泵送到分解和汽提的操作步骤。

5. 发明授权

US07982068B2 Process for urea production and related plant 有权
标题翻译：尿素生产工艺及相关工厂
公开(公告)号：US07982068B2
公开(公告)日：2011-07-19
申请号：US12513487
申请日：2007-10-09
申请人： Federico Zardi , Paolo Brunengo , Paolo Sticchi
发明人： Federico Zardi , Paolo Brunengo , Paolo Sticchi
IPC分类号： C07C273/16 , 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.
摘要翻译：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得到的包含尿素，氨基甲酸铵和氨水的部分水溶液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段中分解并使用至少一部分冷凝蒸汽，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与第二部分水溶液交换，所述加热流体用于在介质中包含尿素，氨基甲酸铵和氨的水溶液的第一部分的解离，压力处理部。

6. 发明授权

US07732640B2 Process for urea production from ammonia and carbon dioxide 有权
标题翻译：从氨和二氧化碳生产尿素的方法
公开(公告)号：US07732640B2
公开(公告)日：2010-06-08
申请号：US11572387
申请日：2005-07-22
申请人： Domenico Romiti , Paolo Sticchi
发明人： Domenico Romiti , Paolo Sticchi
IPC分类号： C07C237/04 , C07C273/08 , C07C273/10 , C07C273/16
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.
摘要翻译：一种尿素生产方法包括第一工艺步骤，其中得到氨（7）和二氧化碳（6），使天然气（1）进行重整处理（12,14），第二步是制备尿素（8a）通过在尿素合成反应器（20）中形成包含尿素和氨基甲酸铵的溶液，随后氨基甲酸铵和/或氨基甲酸铵的分解，从这种氨（7）和二氧化碳中形成包含尿素和氨基甲酸铵的溶液。尿素回收，该方法包括以下步骤： - 将包含二氧化碳的燃烧烟雾（5）与包含这种氨（7）的部分（7b）的水溶液（9a）反应，得到氨基甲酸铵水溶液（9c）; 将由此获得的溶液（9c）供应到第二处理步骤。

7. 发明申请

US20100069631A1 Integrated Process for Urea and Melamine Production 审中-公开
标题翻译：尿素和三聚氰胺生产的综合过程
公开(公告)号：US20100069631A1
公开(公告)日：2010-03-18
申请号：US12513341
申请日：2007-10-09
申请人： Federico Zardi , Paolo Sticchi , Paolo Brunenbo
发明人： Federico Zardi , Paolo Sticchi , Paolo Brunenbo
IPC分类号： C07D251/02 , B01J19/00
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 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).
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部分 21），在三聚氰胺植物（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植物排出并再循环到高压尿素合成段（11）。

8. 发明申请

US20090124830A1 Process for Urea Production and Related Plant 有权
标题翻译：尿素生产工艺及相关工厂
公开(公告)号：US20090124830A1
公开(公告)日：2009-05-14
申请号：US11911461
申请日：2006-04-06
申请人： Federico Zardi , Paolo Sticchi , Paolo Brunengo
发明人： Federico Zardi , Paolo Sticchi , Paolo Brunengo
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.
摘要翻译：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得到的包含尿素，氨基甲酸铵和氨水的部分水溶液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。

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