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21. 发明申请

US20080242890A1 Method for Modernizing a Urea Production Plant 有权
标题翻译：尿素生产厂现代化方法
公开(公告)号：US20080242890A1
公开(公告)日：2008-10-02
申请号：US12051529
申请日：2008-03-19
申请人： Federico Zardi
发明人： Federico Zardi
IPC分类号： C07C273/04 , B01J19/00
CPC分类号： C07C273/04 , B01J2219/00006 , Y02P20/142 , Y02P20/582
摘要： A method for modernizing a urea production plant including a urea synthesis reactor, a stripping unit and at least one condensation unit. The method includes providing: means in the condensation unit for substantially condensing at least a portion of a flow comprising ammonia and carbon dioxide in vapor phase leaving the stripping unit; a second stripping unit; means for feeding a first portion of a reaction mixture flow comprising urea, carbamate and free ammonia in aqueous solution leaving the reactor to the first stripping unit; means for feeding a second portion of the reaction mixture flow leaving the reactor to the second stripping unit; and means for feeding at least a portion of a flow comprising ammonia and carbon dioxide in vapor phase leaving the second stripping unit directly to the synthesis reactor. A de-bottlenecking of the high-pressure section downstream of the synthesis reactor may be achieved, improving production capacity.
摘要翻译：一种使尿素生产设备现代化的方法，包括尿素合成反应器，汽提单元和至少一个冷凝单元。该方法包括提供：在冷凝单元中的装置，用于基本上冷凝包含氨和二氧化碳的气流的至少一部分，离开汽提单元; 第二剥离单元; 用于将含有尿素，氨基甲酸酯和游离氨的反应混合物流的第一部分进料到水溶液中以使反应器进入第一汽提单元的装置; 用于将离开反应器的反应混合物流的第二部分进料到第二汽提单元的装置; 以及用于在汽相中进料至少一部分包含氨和二氧化碳的流的装置，其将第二汽提单元直接送入合成反应器。可以实现合成反应器下游的高压段的脱瓶颈，提高生产能力。

22. 发明申请

US20060099118A1 Plant for urea production 审中-公开
标题翻译：尿素生产厂
公开(公告)号：US20060099118A1
公开(公告)日：2006-05-11
申请号：US10519742
申请日：2003-06-04
申请人： Ermanno Filippi , Enrico Rizzi , Mirco Tarozzo , Federico Zardi
发明人： Ermanno Filippi , Enrico Rizzi , Mirco Tarozzo , Federico Zardi
IPC分类号： B01J19/00 , B32B27/04
CPC分类号： C07C273/04 , B01J19/0013 , B01J2219/00085 , F28D9/0006 , F28D9/0031 , F28F3/04 , F28F2250/102 , Y02P20/142
摘要： Plant for urea production from ammonia and carbon dioxide having a so-called high-pressure section which comprises a synthesis reactor and a condensation unit (7, 107) positioned inside the reactor, all substantially operating at the same pressure.
摘要翻译：具有所谓的高压部分的氨和二氧化碳的尿素生产装置，其包括位于反应器内部的合成反应器和冷凝单元（7,107），所有这些都基本上在相同的压力下操作。

23. 发明申请

US20100285214A1 Fluid Bed Granulation Process and Apparatus 审中-公开
标题翻译：流化床造粒工艺及装置
公开(公告)号：US20100285214A1
公开(公告)日：2010-11-11
申请号：US12811186
申请日：2008-12-19
申请人： Federico Zardi
发明人： Federico Zardi
IPC分类号： B01J2/16
CPC分类号： B05D1/24 , B01J2/16 , B05C19/02
摘要： A fluid bed granulation process and apparatus, wherein a suitable fluid bed of a particulate material is maintained in a granulator (1) fed by an input flow (F) comprising a growth liquid (L) and by a flow (S1) of seeds adapted to promote the granulation, and wherein a part (F2) of said input flow (F) is taken upstream the feeding of the fluid bed, and used in a seeds generator (33), to produce the seeds for the fluid bed.
摘要翻译：流化床造粒方法和装置，其中颗粒材料的合适的流化床保持在由包括生长液体（L）的输入流（F）和由适应的种子的流（S1））供给的造粒机（1）中以促进造粒，并且其中所述输入流（F）的部分（F2）在流体床的进料的上游被采集并用于种子发生器（33）中，以产生用于流化床的种子。

24. 发明申请

US20100210874A1 Process and Plant for Urea Production 有权
标题翻译：尿素生产过程和设备
公开(公告)号：US20100210874A1
公开(公告)日：2010-08-19
申请号：US12679827
申请日：2007-10-04
申请人： Federico Zardi , Sergio Debernardi
发明人： Federico Zardi , Sergio Debernardi
IPC分类号： C07C273/04 , B01J19/00
CPC分类号： C07C273/04 , B01F5/0451 , B01F5/0646 , B01F5/0652 , B01J19/26 , B01J2219/00006
摘要： A process for producing urea is disclosed, wherein liquid ammonia and carbon dioxide are reacted in a high-pressure synthesis section (100), and at least part of the carbon dioxide is fed to said synthesis section (100) in liquid phase. A plant operating according to said process and a method for modernizing existing plants accordingly are also disclosed.
摘要翻译：公开了一种生产尿素的方法，其中液态氨和二氧化碳在高压合成段（100）中反应，并且至少部分二氧化碳以液相进料到所述合成段（100）。还公开了根据所述方法操作的设备以及相应地对现有设备进行现代化的方法。

25. 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。

26. 发明授权

US07585473B2 Carbamate condensation unit 有权
标题翻译：氨基甲酸酯缩合单元
公开(公告)号：US07585473B2
公开(公告)日：2009-09-08
申请号：US10399895
申请日：2001-10-01
申请人： Federico Zardi
发明人： Federico Zardi
IPC分类号： B01J19/00 , C07C273/04
CPC分类号： C07C273/04 , B01J19/242 , B01J19/246 , B01J19/2465 , B01J2219/00094 , C01B21/12 , Y02P20/142
摘要： A carbamate condensation unit of the submerged type for synthesis urea production plants comprising a tube bundle for the condensation of gaseous compounds, is distinguished in that it further comprises a duct, structurally independent from the tube bundle, for the circulation of part of the condensed gaseous compounds inside the condensation unit.
摘要翻译：用于合成尿素生产设备的浸没式氨基甲酸酯缩合单元包括用于冷凝气态化合物的管束，其特征在于它还包括结构上独立于管束的导管，用于循环部分冷凝气态冷凝单元内的化合物。

27. 发明授权

US07153344B2 Process for the preparation and recovery of carbon dioxide from waste gas or fumes produced by combustible oxidation 有权
标题翻译：从废气中制备和回收二氧化碳或通过可燃氧化产生的烟雾的方法
公开(公告)号：US07153344B2
公开(公告)日：2006-12-26
申请号：US10474573
申请日：2002-03-22
申请人： Ermanno Filippi , Federico Zardi
发明人： Ermanno Filippi , Federico Zardi
IPC分类号： B01D53/02
CPC分类号： B01D53/22 , Y02C10/08
摘要： A process for the separation and recovery of carbon dioxide from waste gases produced by combustible oxidation is described comprising the steps of feeding a flow of waste gas to a gas semipermeable material, separating a gaseous flow comprising high concentrated carbon dioxide from said flow of waste gas through the gas semipermeable material, and employing at least a portion of the gaseous flow comprising high concentrated carbon dioxide as feed raw material in an industrial production plant and/or stockpiling at least a portion of the gaseous flow comprising carbon dioxide.
摘要翻译：描述了由可燃氧化产生的废气分离和回收二氧化碳的方法，其包括以下步骤：将废气流供给到气体半透性材料，从所述废气流中分离包含高浓度二氧化碳的气流通过气体半渗透材料，并且使用至少一部分包含高浓度二氧化碳的气流作为工业生产设备中的原料，和/或储存至少一部分包含二氧化碳的气流。

28. 发明授权

US06552224B2 Process and plant for the production of urea 有权
公开(公告)号：US06552224B2
公开(公告)日：2003-04-22
申请号：US10049687
申请日：2002-05-16
申请人： Giorgio Pagani , Federico Zardi , Domenico Romiti
发明人： Giorgio Pagani , Federico Zardi , Domenico Romiti
IPC分类号： C07C27304
CPC分类号： C07C273/04 , Y02P20/582
摘要： A process for urea production in a synthesis loop based on CO2 stripping is distinguished by the fact that at least part of a flow recycle carbamate is sent to a treatment of carbamate decomposition and removal of free ammonia to obtain a vapour flow containing CO2 and NH3 with minimum content of water, and a weak water carbamate solution sent back to a urea recovery unit URS and being at least part of above vapour flow containing CO2 and NH3 with minimum content of water directly fed to the bottom zone of a reaction space.

29. 发明授权

US06334984B1 Hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous solution 失效
标题翻译：水解反应器，用于从包含尿素在水溶液中的液相中除去尿素，氨和二氧化碳
公开(公告)号：US06334984B1
公开(公告)日：2002-01-01
申请号：US09065044
申请日：1998-04-27
申请人： Giorgio Pagani , Federico Zardi
发明人： Giorgio Pagani , Federico Zardi
IPC分类号： B01J804
CPC分类号： C07C273/16 , B01J3/04 , B01J10/002 , B01J19/006 , B01J2219/00777 , B01J2219/185 , B01J2219/1943 , C02F1/025 , C07C273/04 , Y02P20/142
摘要： A hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous solution advantageously comprises a dividing baffle extending horizontally at a preset height in the reactor in which it defines a first and a second respectively lower and upper reaction space, means of collection and extraction from the reactor of a first portion of a gaseous phase comprising high pressure and temperature steam, previously fed into the first reaction space and means for feeding a second portion of the gaseous phase comprising high pressure and temperature steam to the second reaction space.
摘要翻译：用于从包含尿素在水溶液中的液相除去尿素，氨和二氧化碳的水解反应器有利地包括在反应器中以预定高度水平延伸的分隔挡板，其中它限定第一和第二分别下部和上部反应空间从反应器中收集和从反应器中提取预先进料到第一反应空间中的包含高压和高温蒸汽的气相的第一部分的装置，以及用于将包含高压和高温蒸汽的第二部分气相进料至第二反应空间。

30. 发明授权

US09988345B2 Process and plant for the production of an aqueous solution comprising urea 有权
公开(公告)号：US09988345B2
公开(公告)日：2018-06-05
申请号：US12525655
申请日：2008-01-30
申请人： Federico Zardi
发明人： Federico Zardi
IPC分类号： C07C273/00 , C07C273/16
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 characterized 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 vapor 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.

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