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    Method for the simultaneous modernization of a plant for ammonia production and a plant for urea production
    5.
    发明授权
    Method for the simultaneous modernization of a plant for ammonia production and a plant for urea production 有权
    用于氨生产工厂同时现代化的方法和用于生产尿素的设备

    公开(公告)号：US06340451B1

    公开(公告)日：2002-01-22

    申请号：US09538971

    申请日：2000-03-31

    申请人： Giorgio Pagani ,  Federico Zardi

    发明人： Giorgio Pagani ,  Federico Zardi

    IPC分类号： C01C104

    CPC分类号： C01C1/0488 ,  C07C273/10 ,  Y02P20/52

    摘要： A method for the simultaneous modernization of a plant for ammonia synthesis and a plant for urea synthesis, provides—inter alia—the arrangement of a carbamate synthesis section and a carbamate decomposition section, in order to obtain a predetermined amount of carbamate in aqueous solution and of hydrogen and nitrogen in gaseous phase which are fed to the existing sections for urea synthesis, respectively ammonia synthesis. Thanks to this method of modernization it is possible to remarkably increase the production capacity and at the same time to reduce the energy consumption of the urea and ammonia plants without being forced to replace or anyway overload the existing sections of decarbonation, methanation and compression, in general.

    摘要翻译： 用于氨合成设备的同时现代化的方法和用于尿素合成的设备的方法尤其提供氨基甲酸酯合成段和氨基甲酸酯分解段的排列，以便在水溶液中获得预定量的氨基甲酸酯， 的氢气和氮气，分别送入现有的尿素合成段，分别为氨合成。 由于这种现代化方法，可以显着提高生产能力，同时可以降低尿素和氨厂的能源消耗，而不会被迫更换或反过来现有的脱碳，甲烷化和压缩部分， 一般。

    Method for modernizing a urea production plant
    6.
    发明授权
    Method for modernizing a urea production plant 有权
    尿素生产设备现代化的方法

    公开(公告)号：US06284922B1

    公开(公告)日：2001-09-04

    申请号：US09527221

    申请日：2000-03-16

    申请人： Giorgio Pagani ,  Federico Zardi

    发明人： Giorgio Pagani ,  Federico Zardi

    IPC分类号： C07C27300

    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 vapor 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 modernization, 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。

    Process for the revamping of urea synthesis plants consisting of a stripper with ammonia
    7.
    发明授权
    Process for the revamping of urea synthesis plants consisting of a stripper with ammonia 失效
    用氨气脱汽器组成的尿素合成装置改造工艺

    公开(公告)号：US06274767B1

    公开(公告)日：2001-08-14

    申请号：US07987127

    申请日：1992-12-08

    申请人： Giorgio Pagani ,  Umberto Zardi

    发明人： Giorgio Pagani ,  Umberto Zardi

    IPC分类号： C07C27304

    CPC分类号： C07C273/04 ,  B01J2219/00024 ,  Y02P20/142 ,  Y02P20/582

    摘要： Process for the revamping of urea production plants for the synthesis of ammonia (NH3) and carbon dioxide, with a stripping section with NH3, in which the process carries out with differentiated yields, a majority reaction a) between highly pure reagents and a reaction b) between less pure substantially recycled reagents, according to European Patent No. 91116297.2/0479103. According the invention, the urea solution is now fed upstream the stripping section and a reactor with heat removal is utilized. Advantageous, the production capacity of the existing reactor is reduced, with respect to the projected one, in a quantity of 35% to 5%, preferably from 20% to 10%, in favor of the capacity of the “once-through” reactor.

    摘要翻译： 用于合成氨（NH 3）和二氧化碳的尿素生产设备的改造工艺，具有NH 3的汽提部分，其中该方法以不同的产率进行，大多数反应a）高纯试剂和反应b ）在较不纯的基本上再循环的试剂之间，根据欧洲专利号91116297.2 / 0479103。 根据本发明，尿素溶液现在被提供在汽提部分的上游，并且使用具有除热的反应器。 有利的是，现有反应堆的生产能力相对于预计的反应堆减少了35％至5％，优选为20％至10％，有利于“一次通过”反应堆的容量 。

    Heterogeneous synthesis method and apparatus including wall temperature protection
    8.
    发明授权
    Heterogeneous synthesis method and apparatus including wall temperature protection 失效
    异质合成方法及装置包括壁温保护

    公开(公告)号：US5779988A

    公开(公告)日：1998-07-14

    申请号：US432466

    申请日：1995-02-28

    申请人： Umberto Zardi ,  Giorgio Pagani

    发明人： Umberto Zardi ,  Giorgio Pagani

    IPC分类号： B01J8/02 ,  C01C1/04 ,  C01C1/00

    CPC分类号： C01C1/0423 ,  B01J8/0214 ,  Y02P20/52

    摘要： Method for the protection of the internal walls of the shell of Braun type converters, transformed into axial-radial reactors with insertion of a cartridge and a cylindrical perforated wall, characterized by the fact that cooling gas is circulated (FLU) at temperatures between 250.degree. and 300.degree. C. in the airspace (I) between cartridge (C) and (P).

    摘要翻译： 保护Braun型转换器壳体内壁的方法，转换成插入筒体和圆柱形穿孔壁的轴向 - 径向反应器，其特征在于冷却气体在250°C的温度下循环（FLU） 在筒（C）和（P）之间的空气空间（I）中为300℃。

    Reactor for exothermic heterogeneous synthesis reactions
    9.
    发明授权
    Reactor for exothermic heterogeneous synthesis reactions 失效
    异构异构合成反应的反应器

    公开(公告)号：US5171543A

    公开(公告)日：1992-12-15

    申请号：US491311

    申请日：1990-03-09

    申请人： Umberto Zardi ,  Giorgio Pagani

    发明人： Umberto Zardi ,  Giorgio Pagani

    IPC分类号： B01J8/04 ,  C01C1/04

    CPC分类号： C01C1/0423 ,  B01J8/0415 ,  Y02P20/124 ,  Y02P20/129 ,  Y02P20/52

    摘要： Synthesis gas is reacted in several catalytic beds having axial-radial or radial flow. Reacted gas is collected at an outlet of a final catalytic bed and is transferred to a reaction heat recovery system situated at a top of a reactor. The reactor includes three catalytic beds, two or more beds having inverted, curved bottoms. A first quenching system is located in the reactor and includes a distributor situated inside a first, upper bed at a location immediately under an unperforated portion of an internal wall of that bed. A gas/gas heat exchanger is located centrally within one or more of two upper beds located within the reactor. A water pre-heater or boiler is located inside an upper bottleneck portion of a shell of the reactor and is fed with reacted gas collected from a lowermost catalytic bed.

    Converters for heterogeneous catalytic synthesis, particularly for ammonia and methanol, under pressure
    10.
    发明授权
    Converters for heterogeneous catalytic synthesis, particularly for ammonia and methanol, under pressure 失效
    用于异构催化合成的转化剂，特别用于在压力下的氨和甲醇

    公开(公告)号：US5135722A

    公开(公告)日：1992-08-04

    申请号：US288484

    申请日：1988-12-22

    申请人： Umberto Zardi ,  Giorgio Pagani

    发明人： Umberto Zardi ,  Giorgio Pagani

    IPC分类号： B01J8/04 ,  C01C1/04 ,  C07C29/152

    CPC分类号： C01C1/0423 ,  B01J8/0415 ,  B01J8/0496 ,  C07C29/152 ,  B01J2208/00194 ,  B01J2208/00814 ,  Y02P20/52

    摘要： A converter for heterogeneous catalytic synthesis under pressure, consisting of an external shell in a single piece and inside this of at least a cartridge containing a catalyst arranged in one or more beds contained in catalyst-carrying baskets. An external wall of these baskets is provided with means that protrude from the closed bottom and are coupled, in order to be supported, with means protruding from the internal continuous face which extends substantially along the entire axial height of the converter and is the nearest to the internal wall of the baskets. An unflanged labyrinth seal is located between two centrally located heat exchangers contained within the converter.For reactions at high pressures, the wall holding the protruding support rings at the bottom of the baskets is a cartridge wall in a single piece that extends substantially along the whole shell and forms with this an airspace.For reactions at low pressures, the support rings of the basket bottoms protrude from the internal surface of the shell. At least one of the catalytic beds supported by the baskets or elementary cartridges is centrally crossed by an indirect heat exchanger.