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1. 发明申请

WO2011157530A1 METHOD FOR REVAMPING A SELF-STRIPPING UREA PLANT AND PROCESS FOR SYNTHESIS OF UREA 审中-公开
标题翻译：用于自动分离尿素植物的方法和用于合成尿素的方法
公开(公告)号：WO2011157530A1
公开(公告)日：2011-12-22
申请号：PCT/EP2011/058741
申请日：2011-05-27
申请人： UREA CASALE SA , SCOTTO, Andrea , GABBIADINI, Serena , BERTINI, Paolo
发明人： SCOTTO, Andrea , GABBIADINI, Serena , BERTINI, Paolo
IPC分类号： C07C273/04 , B01J10/00 , B01D53/94
CPC分类号： C07C273/04 , B01J2219/00006 , B01J2219/00024
摘要： A method for revamping a self-stripping urea plant is disclosed, where an intermediate recovery section (30) is installed between the existing high- pressure section and medium-pressure section; a stream of urea solution (15A), which is delivered by the high pressure section, is directed to said intermediate section (30), and a flow of concentrated solution (15B) from said intermediate section is directed to said medium pressure section, the intermediate section operating at a pressure between those of the high- and medium-pressure sections. A related process and plant are also disclosed.
摘要翻译：公开了一种改造自动剥离式尿素装置的方法，其中中间回收部分（30）安装在现有的高压部分和中压部分之间; 由高压部分输送的尿素溶液（15A）被引导到所述中间部分（30），并且来自所述中间部分的浓缩溶液（15B）的流动被引导到所述中压部分，中间部分在高压段和中压段之间的压力下工作。还公开了相关的方法和设备。

2. 发明申请

WO2018015093A1 PROCESS FOR MELAMINE PURIFICATION 审中-公开
标题翻译：三聚氰胺净化工艺
公开(公告)号：WO2018015093A1
公开(公告)日：2018-01-25
申请号：PCT/EP2017/065187
申请日：2017-06-21
申请人： CASALE SA
发明人： SCOTTO, Andrea , GAMBA, Simone
IPC分类号： C07D251/60 , C07D251/62
摘要： A process for the purification of a melamine melt (5) containing melamine and by-products, comprising the steps of: (a1) quenching of said melamine melt; (a2) decomposition of by-products with alkali, providing an alkaline aqueous solution of melamine (26); (b) stripping of said alkaline aqueous solution of melamine (26); (c) crystallization of melamine with a first alkali-containing solution (6b) and separation of solid melamine (7) from a mother liquor (8); (d) treatment of said mother liquor, providing a waste water stream (11) containing carbonates; (e) decomposition of at least part of the carbonates contained in said waste water stream (11) into carbon dioxide and alkali, providing a second alkali-containing aqueous solution (30); (f) recycle of at least part of said alkali- containing aqueous solution (30) to at least one of said steps (a1), (a2) and (c).
摘要翻译：一种纯化含三聚氰胺和副产物的三聚氰胺熔体（5）的方法，包括以下步骤：（a1）所述三聚氰胺熔体骤冷; （a2）用碱分解副产物，提供三聚氰胺的碱性水溶液（26）; （b）汽提所述三聚氰胺碱性水溶液（26）; （c）用第一种含碱溶液（6b）结晶三聚氰胺并从母液（8）中分离固体三聚氰胺（7）; （d）处理所述母液，提供含碳酸盐的废水流（11）; （e）将包含在所述废水流（11）中的至少一部分碳酸盐分解成二氧化碳和碱，提供第二含碱水溶液（30）; （f）将所述含碱水溶液（30）的至少一部分循环至所述步骤（a1），（a2）和（c）中的至少一个。

3. 发明申请

WO2011098335A1 FALLING-FILM STRIPPER FOR CARBAMATE DECOMPOSITION 审中-公开
标题翻译：用于碳酸盐分解的薄膜剥离器
公开(公告)号：WO2011098335A1
公开(公告)日：2011-08-18
申请号：PCT/EP2011/050796
申请日：2011-01-21
申请人： UREA CASALE SA , SCOTTO, Andrea , VISCIOTTI, Damiano
发明人： SCOTTO, Andrea , VISCIOTTI, Damiano
IPC分类号： B01D1/06 , B01D1/14 , B01D3/04 , C07C273/04 , B01D3/00
CPC分类号： B01D1/06 , B01D1/14 , B01D3/008 , B01D3/04 , C07C273/04 , Y02P20/142 , Y10T29/49718
摘要： A stripper (S N ) for carbamate decomposition and ammonia plus carbon dioxide recovery from a urea solution (U) is realized with a shell-and-tube heat exchanger, where a liquid falling film of urea solution and a counter- current gaseous flow of a stripping medium fed to a bundle of surface-heated tubes (6); the stripping medium such as carbon dioxide is distributed into the tubes (6) by a plurality of gas risers (32); the gas risers are preferably associated to a perforated tray (30) in the bottom chamber (11) of the stripper. Revamping of a conventional CO 2 stripper is also disclosed.
摘要翻译：氨基甲酸酯分解的脱气剂（SN）和尿素溶液（U）中的氨加二氧化碳回收利用管壳式热交换器实现，其中尿素溶液的液体降膜和逆流气流进料到一束表面加热管（6）的汽提介质; 诸如二氧化碳的汽提介质通过多个气体提升管（32）分配到管（6）中; 气体提升管优选地与剥离器的底部室（11）中的多孔板（30）相关联。还公开了常规二氧化碳汽提器的改造。

4. 发明申请

WO2019145169A1 PLANT FOR THE SYNTHESIS OF MELAMINE WITH OFFGAS RECOVERY IN A TIED-IN UREA PLANT 审中-公开
公开(公告)号：WO2019145169A1
公开(公告)日：2019-08-01
申请号：PCT/EP2019/050746
申请日：2019-01-14
申请人： CASALE SA
发明人： SCOTTO, Andrea , FUMAGALLI, Matteo
IPC分类号： B01J19/00 , C07D251/60 , C07C273/12
摘要： Plant for the synthesis of melamine starting from urea, wherein the stream of offgas containing NH3 and CO2 produced by the synthesis of melamine is converted into urea in a dedicated urea plant.

5. 发明申请

WO2016083005A1 PLANT FOR UREA PRODUCTION 审中-公开
标题翻译：乌拉圭生产厂
公开(公告)号：WO2016083005A1
公开(公告)日：2016-06-02
申请号：PCT/EP2015/073379
申请日：2015-10-09
申请人： CASALE SA
发明人： SCOTTO, Andrea
IPC分类号： C07C273/04
CPC分类号： C07C273/04 , B01J19/0013 , B01J2219/00006 , B01J2219/00024 , B01J2219/00074 , Y02P20/123
摘要： Plant for the synthesis of urea, comprising: a synthesis section comprising at least one reactor, a compressor for supplying CO 2 to said synthesis section, a gas turbine for the operation of said CO 2 compressor and a heat recovery steam generator; the heat source of said heat recovery steam generator consists of the exhaust gases of said gas turbine, and at least one steam flow produced by said heat recovery steam generator is used as heat source for at least one component of said urea plant.
摘要翻译：用于合成尿素的装置，包括：合成部分，其包括至少一个反应器，用于向所述合成部分供应CO 2的压缩机，用于操作所述CO 2压缩机的燃气轮机和热回收蒸汽发生器; 所述热回收蒸汽发生器的热源由所述燃气轮机的废气组成，并且由所述热回收蒸汽发生器产生的至少一个蒸汽流被用作所述尿素设备的至少一个部件的热源。

6. 发明申请

WO2014180761A1 USE OF DUPLEX STAINLESS STEEL IN AN AMMONIA-STRIPPING OF UREA PLANTS 审中-公开
标题翻译：使用双相不锈钢在尿素植物的氨基酸分解中
公开(公告)号：WO2014180761A1
公开(公告)日：2014-11-13
申请号：PCT/EP2014/059053
申请日：2014-05-05
申请人： UREA CASALE SA
发明人： SCOTTO, Andrea , ZARDI, Federico
IPC分类号： B01D1/06 , B01D3/34 , B01J19/02 , C07C273/04 , F28F19/00
CPC分类号： B01J19/02 , B01D1/065 , B01D3/343 , B01J19/1825 , B01J19/24 , B01J19/245 , B01J19/247 , B01J2219/0286 , B01J2219/24 , C07C273/04 , F28D7/16 , F28D2021/0022 , F28F19/06 , F28F21/083 , Y02P20/142
摘要： In an ammonia stripping or self-stripping plant for the synthesis of urea, it is disclosed that a shell-and-tube stripper has a bundle of tubes made of a duplex stainless steel 29Cr-6.5Ni-2Mo-N according to UNS S32906 or 27Cr-7.6Ni- 1 Mo-2.3W-N according to UNS S32808. A revamping of urea plants is also disclosed, including the revamping of ammonia stripping plants, self-stripping plants and conventional total recycle plants, wherein said duplex stainless steel is used for the tubes of the stripper.
摘要翻译：在用于合成尿素的氨汽提或自剥离装置中，公开了壳管式汽提塔具有根据UNS S32906的由双相不锈钢29Cr-6.5Ni-2Mo-N制成的管束，或 27Cr-7.6Ni-1 Mo-2.3WN根据UNS S32808。还公开了尿素装置的改造，包括改造氨汽提装置，自剥离装置和常规总回收装置，其中所述双相不锈钢用于汽提塔的管。

7. 发明申请

WO2021037438A1 A METHOD FOR MEASURING A LIQUID LEVEL IN A PRESSURE VESSEL 审中-公开
公开(公告)号：WO2021037438A1
公开(公告)日：2021-03-04
申请号：PCT/EP2020/070435
申请日：2020-07-20
申请人： CASALE SA
发明人： BERTINI, Paolo , SCOTTO, Andrea , DI CARLO, Gabriele
IPC分类号： G01F23/24
摘要： A method for measuring a liquid level (L) in a pressure vessel (2) the method comprising: providing a thermometric well (10) inside the pressure vessel, heating an inner surface of the thermometric well which is not in contact with the fluid, detecting the temperature of at least one detection point of said inner surface; estimating a position of the liquid level based on the difference between a reference temperature and the temperature so detected.

8. 发明申请

WO2017157561A1 COMBINED APPARATUS FOR THE SYNTHESIS OF UREA 审中-公开
标题翻译：用于合成尿素的组合设备
公开(公告)号：WO2017157561A1
公开(公告)日：2017-09-21
申请号：PCT/EP2017/052019
申请日：2017-01-31
申请人： CASALE SA
发明人： SCOTTO, Andrea , RIZZI, Enrico
IPC分类号： C07C273/04
摘要： Combined apparatus (1) for the synthesis of urea from ammonia and carbon dioxide, comprising an internal wall (3) which delimits two coaxial zones (4) inside the apparatus, operating respectively as reaction (4) and condensation (5)zones, and optionally also comprising a stripping zone and/or a scrubber integrated in the same apparatus.
摘要翻译：用于从氨和二氧化碳合成尿素的组合设备（1）包括限定装置内的两个同轴区（4）的内壁（3），其分别作为反应（4）操作，和冷凝（5）区，并且可选地还包括集成在同一装置中的汽提区和/或洗涤器。

9. 发明申请

WO2016074813A1 UREA FINISHING PROCESS WITH ACID SCRUBBING 审中-公开
标题翻译：尿酸整理过程与酸洗
公开(公告)号：WO2016074813A1
公开(公告)日：2016-05-19
申请号：PCT/EP2015/069857
申请日：2015-08-31
申请人： CASALE SA
发明人： SCOTTO, Andrea , BERTINI, Paolo
IPC分类号： C07C273/16 , B01D53/14 , B01D53/54 , B01D53/58 , B01D53/73
CPC分类号： B01J2/003 , C07C273/16
摘要： A process for the finishing of urea comprising: (a) removing water from an aqueous urea solution in a first evaporation and condensation section, obtaining a urea melt; (b) subjecting said urea melt to a finishing treatment comprising granulation and resulting in solid urea and air contaminated with urea dust and ammonia; (c) subjecting said contaminated air to acid scrubbing, producing an aqueous solution comprising urea and ammonium salts; (d) subjecting at least part of said aqueous solution to evaporation in a second evaporation section, obtaining a liquid stream comprising urea and ammonium salts and a gaseous stream; (e) condensing said gaseous stream in a second condensation section, obtaining a recycle aqueous stream; (f) using at least a part of said recycle aqueous stream for the scrubbing of contaminated air; (g) converting at least a portion of said liquid stream comprising urea and ammonium salts into solid particles, and (h) using said solid particles as seeds for the granulation; a corresponding urea plant and method of revamping a urea plant are also disclosed.
摘要翻译：一种用于尿素整理的方法，包括：（a）在第一蒸发和冷凝部分中从尿素水溶液中除去水，获得尿素熔体; （b）对所述尿素熔体进行整理处理，包括造粒并导致固体尿素和被尿素粉尘和氨污染的空气; （c）使所述被污染的空气进行酸洗涤，产生包含尿素和铵盐的水溶液; （d）使至少部分所述水溶液在第二蒸发段中蒸发，得到包含尿素和铵盐和气流的液体流; （e）在第二冷凝段中冷凝所述气流，获得循环水流; （f）使用至少一部分所述循环水流用于洗涤污染的空气; （g）将包含尿素和铵盐的所述液体流的至少一部分转化成固体颗粒，和（h）使用所述固体颗粒作为颗粒的种子; 还公开了相应的尿素装置和改造尿素装置的方法。

10. 发明申请

WO2014016090A1 CONCENTRATION OF THE UREA SOLUTION IN A PROCESS FOR THE SYNTHESIS OF UREA 审中-公开
标题翻译：尿素溶液在尿素合成过程中的浓度
公开(公告)号：WO2014016090A1
公开(公告)日：2014-01-30
申请号：PCT/EP2013/064045
申请日：2013-07-03
申请人： UREA CASALE SA
发明人： SCOTTO, Andrea
IPC分类号： C07C273/16
CPC分类号： C07C273/16 , B01J19/24 , B01J2219/24 , C07C273/04 , Y02P20/142
摘要： A process and a related plant for the synthesis of urea, where a solution (13) comprising urea is obtained in a synthesis section (10), said solution is treated in a recovery section (14), and an aqueous solution (15) comprising mainly urea and water, which is obtained from said recovery section, is concentrated by means of contact with a water-selective membrane.
摘要翻译：一种用于合成尿素的方法和相关设备，其中在合成部分（10）中获得包含尿素的溶液（13），所述溶液在回收部分（14）中处理，所述水溶液（15）包含主要是从所述回收部分获得的尿素和水通过与水选择性膜接触而被浓缩。

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