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31. 发明授权

US5888460A Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature 失效
标题翻译：用于两相反应的反应器，特别是用于在高压和高温下的尿素合成
公开(公告)号：US5888460A
公开(公告)日：1999-03-30
申请号：US491998
申请日：1995-07-18
申请人： Federico Zardi , Paolo Silva
发明人： Federico Zardi , Paolo Silva
IPC分类号： B01D3/22 , B01J3/04 , B01J10/00 , B01J19/00 , C07C273/04 , B01J8/04
CPC分类号： C07C273/04 , B01D3/22 , B01J10/002 , B01J19/006 , B01J3/04 , B01J2219/00024 , B01J2219/00777 , B01J2219/185 , B01J2219/1943 , Y02P20/142 , Y02P20/582
摘要： An in-situ modernization method is provided for a reactor of the type having a plurality of spaced apart perforated plates disposed within a hollow cylindrical vessel wherein the plates are perforated and spaced from the vessel wall to define an annular gap between the periphery of each plate and the vessel wall. The method includes the steps of providing a substantially annular baffle to substantially close the gap while leaving an opening with the openings of adjacent plates being diametrically opposed to each other. Alternatively, the annular gap may be substantially closed by an annular baffle and an enlarged opening is provided in each plate with the openings of adjacent plates being diametrically opposed to each other.
摘要翻译： PCT No.PCT / EP95 / 00554 Sec。 371 1995年7月18日第 102（e）1995年7月18日PCT PCT 1995年2月15日提交PCT公布。公开号WO95 / 31278 日期1995年11月23日为了这种类型的反应器提供现场现代化方法，该反应器具有设置在中空圆柱形容器内的多个间隔开的多孔板，其中板与容器壁进行穿孔并间隔开，每个板的周边和血管壁。该方法包括以下步骤：提供基本上环形的挡板以基本上封闭间隙，同时留下开口，相邻板的开口彼此直径相对。或者，环形间隙可以由环形挡板基本封闭，并且在每个板中提供扩大的开口，相邻板的开口彼此沿直径相对。

32. 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.

33. 发明授权

US08721975B2 Plant for urea production 有权
标题翻译：尿素生产厂房
公开(公告)号：US08721975B2
公开(公告)日：2014-05-13
申请号：US12367240
申请日：2009-02-06
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： C01C1/00 , B01J8/00 , B01J19/00 , F28D7/00 , B01J19/24 , B01D5/00 , F28D7/02 , F28D7/10 , C07C273/00
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。

34. 发明授权

US08367867B2 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：US08367867B2
公开(公告)日：2013-02-05
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
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。

35. 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。

36. 发明申请

US20090220396A1 Plant for Urea Production 有权
标题翻译：尿素生产厂
公开(公告)号：US20090220396A1
公开(公告)日：2009-09-03
申请号：US12367240
申请日：2009-02-06
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
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运行。

37. 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）。

38. 发明申请

US20050256339A1 Process and plant for the production of area 有权
标题翻译：过程和厂房生产区域
公开(公告)号：US20050256339A1
公开(公告)日：2005-11-17
申请号：US10513189
申请日：2004-01-15
申请人： Federico Zardi
发明人： Federico Zardi
IPC分类号： B01J10/00 , C07C1/00 , C07C273/04
CPC分类号： C07C273/04
摘要： A process for urea production comprises the steps of:—performing a reaction between ammonia and carbon dioxide in a reaction space to obtain a reaction mixture comprising urea, carbamate and free ammonia in aqueous solution,—subjecting said mixture to a stripping treatment with carbon dioxide feed as a stripping agent to obtain a first flow comprising ammonia and carbon dioxide in vapor phase and a flow comprising urea and residual carbamate in aqueous solution,—feeding said flow comprising urea and residual carbamate in aqueoue solution to a urea recovery section,—separating in said recovery section said residual carbamate from the urea to obtain a first flow of carbamate in aqueous solution.
摘要翻译：一种用于生产尿素的方法包括以下步骤： - 在反应空间中实施氨和二氧化碳之间的反应，以获得包含尿素，氨基甲酸酯和游离氨在水溶液中的反应混合物， - 将所述混合物喷射到二氧化碳的汽提处理进料作为汽提剂以获得包含气相中的氨和二氧化碳的第一流，以及包含尿素和残留的氨基甲酸酯在水溶液中的流动，将包含脲和氨基甲酸酯的残留氨基甲酸酯在阿克斯溶液中进料到尿素回收段，分离在所述回收部分中，所述残余的氨基甲酸酯从尿素中获得在水溶液中的氨基甲酸酯的第一流。

39. 发明授权

US06827887B2 Method for obtaining urea prills 有权
标题翻译：获得尿素颗粒的方法
公开(公告)号：US06827887B2
公开(公告)日：2004-12-07
申请号：US09987078
申请日：2001-11-13
申请人： Federico Zardi , Domenico Romiti
发明人： Federico Zardi , Domenico Romiti
IPC分类号： B29B910
CPC分类号： B01J2/04 , C05C9/005 , F28F3/12 , F28F19/008
摘要： A method for obtaining urea prills in a prilling tower (1) comprising the step of making a plurality of melt urea droplets to fall from a urea melt distributing device (4) towards an urea prills collecting bottom (6) of the prilling tower, further comprises the step of cooling the collecting bottom (6).
摘要翻译：一种在造粒塔（1）中获得尿素颗粒的方法，包括使多个熔融尿素液滴从尿素熔体分配装置（4）向造粒塔的尿素颗粒收集底部（6）落下的步骤包括冷却收集底部（6）的步骤。

40. 发明授权

US06444180B1 Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature 有权
标题翻译：用于两相反应的反应器，特别是用于在高压和高温下的尿素合成
公开(公告)号：US06444180B1
公开(公告)日：2002-09-03
申请号：US09722029
申请日：2000-11-27
申请人： Federico Zardi , Paolo Silva
发明人： Federico Zardi , Paolo Silva
IPC分类号： B01J1000
CPC分类号： C07C273/04 , B01D3/22 , B01J3/04 , B01J10/002 , B01J19/006 , B01J2219/00024 , B01J2219/00777 , B01J2219/185 , B01J2219/1943 , Y02P20/142 , Y02P20/582
摘要： A reactor for two-phase reaction, in particular for urea synthesis at high pressure and temperature of the type wherein a co-current flow of a gaseous phase and a liquid phase takes place, comprises a substantially cylindrical vertical external shell (2) in which is supported a plurality of superimposed horizontal perforated plates (6a-6e) in mutually spaced relationship and at least one opening (12a-12e) for liquid flow being defined in correspondence of each of the perforated plates. Advantageously the openings (12a-12e) for liquid flow are mutually offset so as to obtain a substantially zigzag preferential flow path for the liquid phase in the reactor.
摘要翻译：用于两相反应的反应器，特别是在其中发生气相和液相的并流流动的高压和高温下的尿素合成反应器包括基本上圆柱形的垂直外壳（2），其中以相互间隔的关系支撑多个重叠的水平多孔板（6a-6e），并且用于液体流动的至少一个开口（12a-12e）对应于每个多孔板被限定。有利地，用于液体流动的开口（12a-12e）相互偏移，以便获得用于反应器中的液相的基本上Z字形的优先流动路径。

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