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公开(公告)号：US20180326345A1
公开(公告)日：2018-11-15
申请号：US15536077
申请日：2015-12-17
申请人： Stamicarbon B.V.
CPC分类号： B01D47/10 , B01D47/05 , B01D47/06 , C05C9/00 , C07C273/02 , C07C273/04
摘要： Disclosed is a method for the removal of urea dust from the off-gas of a finishing section of a urea production plant. the method comprises subjecting the off-gas to quenching with water so as to produce quenched off-gas. The quenched off-gas is subjected to humidification by mixing said quenched gas stream with a humidification fluid selected from (a) saturated steam and (b) superheated steam mixed with a second aqueous stream, so as to produce a humidified gas stream, subjecting said humidified gas stream to particle separation (i.e., dust removal) by means of a scrubbing liquid in which at least part of the particles in the gas stream are soluble.
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公开(公告)号：US20240279165A1
公开(公告)日：2024-08-22
申请号：US18609842
申请日：2024-03-19
申请人： Stamicarbon B.V.
IPC分类号： C07C273/04 , B01D5/00 , B01J3/02 , B01J3/04
CPC分类号： C07C273/04 , B01D5/0075 , B01J3/02 , B01J3/042
摘要： The disclosure pertains to a urea production plant and process using a thermal stripper, wherein the reaction mixture is separated in two parts, wherein the first part is supplied at least in part to the thermal stripper and the second part at least in part bypasses the thermal stripper and is supplied to a medium pressure recovery section.
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公开(公告)号：US12060313B2
公开(公告)日：2024-08-13
申请号：US18007232
申请日：2022-02-22
申请人： STAMICARBON B.V.
IPC分类号： B01J10/00 , B01J19/00 , C01C1/18 , C07C273/04
CPC分类号： C07C273/04 , B01J10/00 , B01J19/0053 , B01J19/0086 , C01C1/185 , B01J2219/00006 , B01J2219/0002 , B01J2219/00038 , B01J2219/00761
摘要： Some embodiments of the disclosure pertain to a plant and a process for producing a urea-containing product. The plant comprises a medium pressure dissociation unit and a high pressure CO2 stripper each receiving a part of the urea synthesis solution. Stripped urea solution is further treated in a medium pressure treatment unit.
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公开(公告)号：US20240262787A1
公开(公告)日：2024-08-08
申请号：US18621755
申请日：2024-03-29
申请人： STAMICARBON B.V.
IPC分类号： C07C273/04 , B01D1/06 , B01D3/34 , B01J19/00 , B01J19/02 , B22F7/06 , C07C273/16 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/26 , C22C38/42 , C22C38/44 , C22C38/48
CPC分类号： C07C273/04 , B01D1/065 , B01D3/346 , B01J19/0013 , B01J19/02 , C07C273/16 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/26 , C22C38/42 , C22C38/44 , C22C38/48 , B01J2219/00081 , B01J2219/0286 , B22F7/064 , B22F2301/35 , C21D2211/005
摘要： The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.
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公开(公告)号：US20240092730A1
公开(公告)日：2024-03-21
申请号：US18248902
申请日：2022-12-19
申请人： STAMICARBON B.V.
IPC分类号： B01D5/00 , C07C273/04
CPC分类号： B01D5/0012 , C07C273/04
摘要： The disclosure pertains to a urea plant and process of the thermal stripping type as well as to a method of modifying a urea plant of the thermal stripping type. Provided is a urea plant with a thermal stripper and a high pressure carbamate condenser with a shell space wherein gas from the stripper is condensed in the shell space.
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公开(公告)号：US11912649B2
公开(公告)日：2024-02-27
申请号：US17424948
申请日：2020-12-30
申请人： STAMICARBON B.V.
IPC分类号： C07C273/14 , C07C273/04 , B01D53/00 , B01D53/58
CPC分类号： C07C273/14 , B01D53/002 , B01D53/58 , B01D2251/504 , B01D2251/506 , B01D2257/406 , B01D2257/80 , C07C273/04
摘要： Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. Also disclosed is a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scrubbing section, the off-gas is brought into contact with an acidic scrubbing liquid so as to provide a scrubbed off-gas and a utilized scrubbing liquid comprising ammonium salt. The method specifies an evaporation section, which is part of the urea plant that produces urea melt, that is divided into first and second stages. The first stage is part of the urea melt production plant. The second stage decoupled, as regards recirculation of liquids other than the urea product stream, from the urea melt production plant. This is accomplished by sending utilized scrubbing liquid that contains ammonium salts to the second stage evaporation section, and by sending condensed vapours from said second stage evaporation section to said scrubbing section.
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公开(公告)号：US11795140B2
公开(公告)日：2023-10-24
申请号：US18006046
申请日：2022-06-10
申请人： STAMICARBON B.V.
IPC分类号： C07C273/04 , B01J19/00 , B01D3/00 , B01D5/00 , B01D19/00
CPC分类号： C07C273/04 , B01D5/0003 , B01D5/0057 , B01D19/0036 , B01J19/002 , B01J2219/00024 , B01J2219/00245
摘要： The disclosure pertains to a urea production plant and process using a high-pressure CO2 stripper, downstream medium-pressure treatment unit and a medium-pressure dissociator receiving urea synthesis solution from the reactor, wherein gas from the treatment unit and dissociator are condensed in a first condenser and off-gas from the synthesis section is condensed separately in a second condenser. A revamping method is also described.
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公开(公告)号：US20230123681A1
公开(公告)日：2023-04-20
申请号：US18069690
申请日：2022-12-21
申请人： STAMICARBON B.V.
IPC分类号： C07C273/04 , B01D1/06 , B01D3/34 , B01J19/00 , B01J19/02 , C07C273/16 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/48 , C22C38/26
摘要： The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.
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公开(公告)号：US11331623B2
公开(公告)日：2022-05-17
申请号：US17104644
申请日：2020-11-25
发明人： Michele Colozzi , Emma Palo , Palma Contaldo , Maria Rosaria Pepe , Vincenzo Palma , Vincenzo Vaiano
IPC分类号： B01D53/48 , B01J23/06 , B01J23/22 , B01J23/26 , B01J23/28 , B01J23/34 , B01J23/46 , B01J23/745 , B01J23/755 , B01D53/14 , B01J19/24 , C07C7/148 , C10L3/10
摘要： Disclosed is method for removing carbonyl sulphide and/or carbon disulphide from a sour gas stream. The method comprises subjecting the gas stream to simultaneous contact with an absorption liquid, such as an aqueous amine solution, and with a catalyst suitable for hydrolyzing carbonyl sulphide and/or carbon disulphide. To this end, the invention also provides a reactor system wherein both an absorption liquid and a catalyst are present. In a preferred embodiment, the catalyst is a heterogeneous catalyst present on or in an absorption column, either coated on the trays of a column with trays, or contained in the packing of a packed column.
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公开(公告)号：US20220089527A1
公开(公告)日：2022-03-24
申请号：US17424948
申请日：2020-12-30
申请人： STAMICARBON B.V.
IPC分类号： C07C273/14 , B01D53/58 , B01D53/00
摘要： Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. Also disclosed is a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scrubbing section, the off-gas is brought into contact with an acidic scrubbing liquid so as to provide a scrubbed off-gas and a utilized scrubbing liquid comprising ammonium salt. The method specifies an evaporation section, which is part of the urea plant that produces urea melt, that is divided into first and second stages. The first stage is part of the urea melt production plant. The second stage decoupled, as regards recirculation of liquids other than the urea product stream, from the urea melt production plant. This is accomplished by sending utilized scrubbing liquid that contains ammonium salts to the second stage evaporation section, and by sending condensed vapours from said second stage evaporation section to said scrubbing section.
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