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1. 发明申请

US20070282102A1 Integrated Process for Urea and Melamine Production 有权
标题翻译：尿素和三聚氰胺生产的综合过程
公开(公告)号：US20070282102A1
公开(公告)日：2007-12-06
申请号：US11777842
申请日：2007-07-13
申请人： Paolo Brunengo , Federico Zardi
发明人： Paolo Brunengo , Federico Zardi
IPC分类号： C07C273/12 , B01J19/24 , C07D251/60
CPC分类号： C07D251/60 , B01J2219/00006 , B01J2219/00092 , B01J2219/00103 , C07C273/12 , Y02P20/125 , Y02P20/582
摘要： In an integrated process for urea and melamine production, urea is produced in a urea plant (12) comprising a high pressure urea synthesis section (15) and a urea recovery section (16) for separating urea from a carbamate aqueous solution, and melamine is produced in a melamine plant (11) wherein off-gases resulting as byproducts of the melamine synthesis are discharged therefrom at a pressure of at least 2 bar and recycled to the high pressure urea synthesis section (15).
摘要翻译：在尿素和三聚氰胺生产的综合方法中，尿素在尿素装置（12）中生产，尿素装置（12）包括高压尿素合成段（15）和用于从氨基甲酸酯水溶液中分离尿素的尿素回收段（16），三聚氰胺是在三聚氰胺植物（11）中生产，其中作为三聚氰胺合成的副产物产生的废气在至少2巴的压力下从其中排出并再循环到高压尿素合成段（15）。

2. 发明授权

US07414130B2 Integrated process for urea and melamine production 有权
标题翻译：尿素和三聚氰胺生产的综合过程
公开(公告)号：US07414130B2
公开(公告)日：2008-08-19
申请号：US11777842
申请日：2007-07-13
申请人： Paolo Brunengo , Federico Zardi
发明人： Paolo Brunengo , Federico Zardi
IPC分类号： C07D251/60
CPC分类号： C07D251/60 , B01J2219/00006 , B01J2219/00092 , B01J2219/00103 , C07C273/12 , Y02P20/125 , Y02P20/582
摘要： In an integrated process for urea and melamine production, urea is produced in a urea plant (12) comprising a high pressure urea synthesis section (15) and a urea recovery section (16) for separating urea from a carbamate aqueous solution, and melamine is produced in a melamine plant (11) wherein off-gases resulting as byproducts of the melamine synthesis are discharged therefrom at a pressure of at least 2 bar and recycled to the high pressure urea synthesis section (15).
摘要翻译：在尿素和三聚氰胺生产的综合方法中，尿素在尿素装置（12）中生产，尿素装置（12）包括高压尿素合成段（15）和用于从氨基甲酸酯水溶液中分离尿素的尿素回收段（16），三聚氰胺是在三聚氰胺植物（11）中生产，其中作为三聚氰胺合成的副产物产生的废气在至少2巴的压力下从其中排出并再循环到高压尿素合成段（15）。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明申请

US20070032650A1 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：US20070032650A1
公开(公告)日：2007-02-08
申请号：US10595349
申请日：2004-08-10
申请人： Paolo Brunengo , Federico Zardi
发明人： Paolo Brunengo , Federico Zardi
IPC分类号： C07D251/60 , C07C273/12
CPC分类号： C07D251/60 , B01J2219/00006 , B01J2219/00092 , B01J2219/00103 , C07C273/12 , Y02P20/125 , Y02P20/582
摘要： In an integrated process for urea and melamine production, urea is produced in a urea plant (12) comprising a high pressure urea synthesis section (15) and a urea recovery section (16) for separating urea from a carbamate aqueous solution, and melamine is produced in a melamine plant (11) wherein off-gases resulting as byproducts of the melamine synthesis are discharged therefrom at a pressure of at least 2 bar and recycled to the high pressure urea synthesis section (15).
摘要翻译：在尿素和三聚氰胺生产的综合方法中，尿素在尿素装置（12）中生产，尿素装置（12）包括高压尿素合成段（15）和用于从氨基甲酸酯水溶液中分离尿素的尿素回收段（16），三聚氰胺是在三聚氰胺植物（11）中生产，其中作为三聚氰胺合成的副产物产生的废气在至少2巴的压力下从其中排出并再循环到高压尿素合成段（15）。

8. 发明申请

US20110306791A1 IMPROVEMENT TO THE HIGH-PRESSURE LOOP IN A PROCESS FOR SYNTHESIS OF UREA 有权
标题翻译：改进乌拉圭合成工艺中的高压环路
公开(公告)号：US20110306791A1
公开(公告)日：2011-12-15
申请号：US13140286
申请日：2009-11-17
申请人： Federico Zardi , Andrea Scotto
发明人： Federico Zardi , Andrea Scotto
IPC分类号： C07C273/04 , B01J8/00
CPC分类号： C07C273/04 , B01D19/0015 , B01J2219/00006 , B01J2219/00024 , B01J2219/00108 , Y02P20/142
摘要： A process and a related plant layout for producing urea are disclosed, wherein the high-pressure loop (1) comprises a synthesis reactor (2), a thermal stripper (3), a condenser (4), and an adiabatic CO2 stripper (10) disposed upstream said thermal stripper, separating a vapour phase (13) containing ammonia from the urea solution (9) discharged from the reactor, and recycling said vapour phase to the reactor. The adiabatic stripper (10) can be incorporated in a reactor (200) having a top reaction zone and a bottom diabatic stripping zone. A revamping method for a conventional urea plant in accordance with the inventive process is also disclosed.
摘要翻译：公开了一种用于生产尿素的方法和相关工厂布局，其中高压回路（1）包括合成反应器（2），热汽提器（3），冷凝器（4）和绝热CO 2汽提器（10 ），设置在所述热汽提器的上游，从从反应器排出的尿素溶液（9）中分离含有氨的气相（13），并将所述气相再循环到反应器。绝热汽提塔（10）可以结合在具有顶部反应区和底部绝热剥离区的反应器（200）中。还公开了根据本发明方法的常规尿素装置的改进方法。

9. 发明申请

US20100140543A1 Process and Plant for the Production of an Aqueous Solution Comprising Urea 有权
标题翻译：用于生产包含尿素的水溶液的方法和设备
公开(公告)号：US20100140543A1
公开(公告)日：2010-06-10
申请号：US12525655
申请日：2008-01-30
申请人： Federico Zardi
发明人： Federico Zardi
IPC分类号： C09K3/00 , B01J19/00 , B23P11/00
CPC分类号： C07C273/16 , B01D2251/2062 , B01J2219/00024 , Y10T29/49826
摘要： The present invention regards a process for the production of an aqueous solution comprising urea for use in the removal of nitrogen oxides from combustion gas or fumes, the process being characterised in that it comprises the steps of: -subjecting at least a part of a urea-concentrated aqueous solution comprising residual free ammonia, obtained directly from or downstream of a recovery section of a plant for the production of urea, to washing with carbon dioxide, so obtaining a first vapour phase comprising carbon dioxide and optionally ammonia and a urea-concentrated aqueous solution comprising carbamate and essentially lacking in free ammonia, and -diluting said urea-concentrated aqueous solution comprising carbamate and essentially lacking in free ammonia with water until the desired concentration of urea in aqueous solution is reached.
摘要翻译：本发明涉及用于生产包含尿素的水溶液的方法，该方法用于从燃烧气体或烟气中除去氮氧化物，该方法的特征在于其包括以下步骤： - 将至少一部分尿素包含残余游离氨的浓缩水溶液，其直接从用于生产尿素的设备的回收部分的下游获得，用二氧化碳洗涤，从而获得包含二氧化碳和任选的氨的第一气相和尿素浓缩包含氨基甲酸酯并且基本上不含游离氨的水溶液，并且用水稀释所述包含氨基甲酸酯并且基本上不含游离氨的尿素浓缩水溶液，直到达到所需浓度的尿素在水溶液中。

10. 发明授权

US06702992B2 Method for modernizing a urea production plant 有权
标题翻译：尿素生产设备现代化的方法
公开(公告)号：US06702992B2
公开(公告)日：2004-03-09
申请号：US09881099
申请日：2001-06-15
申请人： Giorgio Pagani , Federico Zardi
发明人： Giorgio Pagani , Federico Zardi
IPC分类号： B01J804
CPC分类号： C07C273/04 , B01D5/0012 , B01D5/0081 , B01J19/2425 , B01J2219/00024 , B01J2219/00081 , B01J2219/00159 , Y02P20/582
摘要： A method for the modernization of a plant for urea production of the type comprising a reactor (2) for urea synthesis, a stripping unit (3) with carbon dioxide and at least one vertical condensation unit (4) of the film type, foresees the provision of means (36) for feeding a major portion of a flow comprising ammonia and carbon dioxide in vapor phase leaving the stripping unit (3) to the condensation unit (4) and the provision in said condensation unit (4) of means (37) for subjecting to substantially total condensation such major portion of the flow comprising ammonia and carbon dioxide in vapour phase, obtaining a flow comprising urea and carbamate in aqueous solution, then fed to the reactor (2) for urea synthesis. Thanks to the present method of modernisation, the efficiency of the condensation unit (4) is remarkably improved, thus permitting an increase of its capacity.
摘要翻译：用于尿素生产用于尿素生产的设备的现代化方法包括用于尿素合成的反应器（2），具有二氧化碳的汽提单元（3）和膜类型的至少一个垂直冷凝单元（4），其预期为提供用于将气流中包含氨和二氧化碳的大部分流动供给到冷凝单元（4）的装置（36），并且在所述冷凝单元（4）中提供装置（37）），以使气相中含有氨和二氧化碳的大部分流动基本上完全冷凝，得到包含尿素和氨基甲酸酯在水溶液中的流动，然后送入反应器（2）进行尿素合成。由于现代化的现代化方法，冷凝单元（4）的效率显着提高，从而允许其容量增加。

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