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1. 发明授权

US6120740A Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature 有权
公开(公告)号：US6120740A
公开(公告)日：2000-09-19
申请号：US226909
申请日：1999-01-05
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： 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.

2. 发明授权

US06175040B1 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：US06175040B1
公开(公告)日：2001-01-16
申请号：US09226913
申请日：1999-01-05
申请人： Federico Zardi , Paolo Silva
发明人： Federico Zardi , Paolo Silva
IPC分类号： C07C27304
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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 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）。

8. 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。

9. 发明授权

US09708250B2 Process and plant for ammonia-urea production 有权
公开(公告)号：US09708250B2
公开(公告)日：2017-07-18
申请号：US14007100
申请日：2012-02-10
申请人： Ermanno Filippi , Marco Badano , Federico Zardi , Andrea Scotto
发明人： Ermanno Filippi , Marco Badano , Federico Zardi , Andrea Scotto
IPC分类号： C07C273/10 , C01C1/04
CPC分类号： C07C273/10 , C01C1/0488 , Y02P20/52 , C07C275/02
摘要： A process for ammonia-urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia-urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia-urea plants.

10. 发明授权

US08263805B2 Process and plant for urea production 有权
公开(公告)号：US08263805B2
公开(公告)日：2012-09-11
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
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.

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