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581.发明申请公开(公告)号：US20180304224A1
公开(公告)日：2018-10-25
申请号：US16024686
申请日：2018-06-29
Applicant: Stamicarbon B.V.
Inventor： Linn LARSSON , Daniel GULLBERG , Ulf KIVISÄKK , Martin ÖSTLUND , Alexander Aleida Antonius SCHEERDER
IPC: B01J19/02 , C22C38/04 , C22C38/00 , C07C273/04 , B22F3/15 , C22C38/58 , C22C38/44 , C22C38/42 , F28F21/08 , C22C38/40 , C22C33/02 , C22C38/02
Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C 0-0.05; Si0-0.8; Mn0-4.0; Crmore than 29-35; Ni3.0-10; Mo0-4.0; N0.30-0.55: Cu0-0.8; W0-3.0; S 0-0.03; Ce0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.
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公开(公告)号：US20180195158A1
公开(公告)日：2018-07-12
申请号：US15746384
申请日：2016-07-20
Applicant: STAMICARBON B.V.
Inventor： Daniel GULLBERG , Christina HARALDSSON , Anders WILSON , Alexander Aleida Antonius SCHEERDER , Kirk Anguah OFEI
CPC classification number: C22C38/58 , B01D1/06 , B01D3/32 , B01J19/02 , B01J2219/0286 , C07C273/04 , C21D6/004 , C21D8/005 , C21D9/08 , C21D2211/001 , C21D2211/005 , C22C1/02 , C22C33/04 , C22C38/001 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , F28F21/083 , Y02P10/122
Abstract: The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea; and uses thereof. The disclosure also relates to objects made of said duplex stainless steel. Furthermore, the present disclosure also relates to a method for the production of urea and to a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and to a method of modifying an existing plant for the production of urea.
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公开(公告)号：US09981924B2
公开(公告)日：2018-05-29
申请号：US15692715
申请日：2017-08-31
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus Mennen
IPC: C07D251/60 , C07D251/62 , C07C273/12 , B01J19/24
CPC classification number: C07D251/60 , B01J19/245 , B01J2219/00103 , B01J2219/24 , C07C273/12 , C07D251/62
Abstract: Disclosed is a process for the integrated production of urea and melamine. A urea production zone produces a urea synthesis stream comprising urea, water and ammonium carbamate. This stream is subjected to processing, preferably involving stripping, so as to separate an aqueous urea stream from residual dissociated carbamate vapor comprising ammonia, carbon dioxide, and water. The urea is fed to a melamine synthesis zone and subjected to melamine forming conditions so as to form melamine and off-gas comprising carbon dioxide and ammonia. The dissociated carbamate vapor and the melamine off-gas are subjected to combined condensation so as to form a dilute melamine off-gas condensate.
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公开(公告)号：US20180044264A1
公开(公告)日：2018-02-15
申请号：US15555924
申请日：2016-03-04
Inventor： Chiarra CROPPI , Francesco Simone MARTORELLI , Emma PALO , Gaetano IAQUANIELLO , Annarita SALLADINI
CPC classification number: C07C5/333 , B01D53/226 , B01D53/228 , B01D53/229 , B01D69/02 , B01D71/022 , B01D2053/221 , B01D2256/24 , B01D2256/245 , B01D2257/108 , B01D2325/04 , B01J8/009 , B01J8/0419 , B01J8/0492 , B01J19/245 , B01J2208/00212 , B01J2208/00274 , B01J2219/00024 , B01J2219/24 , C07C5/3335 , C07C5/3337 , C07C7/144 , C07C2521/04 , C07C2523/26 , C07C2523/42 , C07C11/06 , C07C11/04 , C07C11/08 , C07C15/46
Abstract: Disclosed is a method and plant for the catalytic dehydrogenation of alkanes, such as propane. The plant is a plant of hybrid architecture wherein one or more membrane-assisted reactor configurations according to open architecture are combined with one or more membrane-containing reactors of closed architecture. Hydrogen remaining in the reaction mixture after separation in the membrane separation unit of a first open architecture configuration, is fed to a first membrane-reactor of the closed architecture type. Also disclosed are methods of modifying plants so as to create the hybrid architecture plant.
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公开(公告)号：US09890115B2
公开(公告)日：2018-02-13
申请号：US14127962
申请日：2012-10-12
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus Mennen
IPC: C07C273/16 , C07C273/14 , B01J2/22 , B01J2/30 , B29C43/00 , C05C9/02 , C05C9/00 , B29K75/00
CPC classification number: C07C273/16 , B01J2/22 , B01J2/30 , B29C43/006 , B29K2075/02 , C05C9/005 , C05C9/02 , C07C273/14 , Y10T29/49716
Abstract: Disclosed is a method for urea finishing. A urea solution is subjected to crystallization and, other than in conventional processes, the urea crystals are shaped by exerting mechanical force onto them. Thus, the conventional prilling or granulation finishing steps can be avoided, and so are the corresponding emissions of ammonia and/or dust. The crystallization comprises a flash crystallization. The invention also pertains to the urea particles obtainable by the process, to a urea plant, and to a method of modifying an existing urea plant.
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Patent Agency Ranking
公开(公告)号：US20170326521A1
公开(公告)日：2017-11-16
申请号：US15669818
申请日：2017-08-04
Applicant: Stamicarbon B.V.
Inventor： Luc Louis Maria DIELTJENS
IPC: B01J12/00 , C07C273/04
CPC classification number: B01J12/005 , B01J12/00 , C07C273/04 , Y02P20/142
Abstract: The invention relates to a urea plant with a CO2 and a NH3 feed, which comprises a purge line, characterized in that the purge line is connected with a fuel gas input line of a utility plant or an NH3 plant.
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公开(公告)号：US20170260061A1
公开(公告)日：2017-09-14
申请号：US15528708
申请日：2015-11-26
Applicant: Stamicarbon B.V.
CPC classification number: C01C1/185 , B01J10/007 , B01J19/002 , B01J2219/00024 , B01J2219/0004 , C05C1/00 , C05C9/00
Abstract: The invention provides a method and a plant for producing urea ammonium nitrate (UAN). The method involves the use of a condensation section, optionally in combination with a medium pressure decomposition section, between the dissociation and neutralization sections. The invention further provides a method of modifying an existing UAN plant. The advantages of the process of the invention are that the emission of CO2 can be reduced, the plant capacity can be increased and the high capital expenditure needed for CO2 compression equipment is reduced.
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公开(公告)号：US20170204054A1
公开(公告)日：2017-07-20
申请号：US15326434
申请日：2015-07-16
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus MENNEN
IPC: C07C273/16 , B01D21/26 , B01D9/00
CPC classification number: C07C273/16 , B01D9/0022 , B01D21/262 , C07C275/02
Abstract: Disclosed is a process for the preparation of a urea product suitable for being diluted with water so as to form an aqueous urea comprising solution for use in a unit for the reduction of NOx in combustion engine exhaust gases, also known as Diesel Exhaust Fluid (DEF) or to be used in De NOx systems of exhaust vapor from industrial furnaces. The process comprises obtaining an aqueous urea solution from or after a recovery section in a urea production process. This solution, which has a low content of impurities, is subjected to flash crystallization at a low pressure, so as to obtain a solid crystallized urea containing product, which is a free-flowing powder containing less than 0.2 wt. % water. This product is packaged under conditions such that the water content in the packaged product is maintained below 0.2 wt. %. The invention can also be used in a method of increasing the capacity of an existing urea plant.
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公开(公告)号：US20170137330A1
公开(公告)日：2017-05-18
申请号：US15421265
申请日：2017-01-31
Applicant: Stamicarbon B.V.
Inventor： Jozef Hubert MEESSEN , Pantelis ORFANIDIS
CPC classification number: C05C3/00 , B01D53/54 , B01D53/58 , B01D53/80 , B01D2251/506 , B01D2257/406 , B01D2257/70 , C01C1/12 , C01C1/22 , C05C3/005 , C05C9/00 , C07C273/16
Abstract: The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.
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公开(公告)号：US09556077B2
公开(公告)日：2017-01-31
申请号：US14098496
申请日：2013-12-05
Applicant: Stamicarbon B.V.
Inventor： Jozef Hubert Meessen , Pantelis Orfanidis
IPC: B01D47/00 , C05C9/00 , C01C1/12 , C05C3/00 , C07C273/16
CPC classification number: C05C3/00 , B01D53/54 , B01D53/58 , B01D53/80 , B01D2251/506 , B01D2257/406 , B01D2257/70 , C01C1/12 , C01C1/22 , C05C3/005 , C05C9/00 , C07C273/16
Abstract: The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.
Abstract translation: 本发明涉及通过使所述气流与硫酸水溶液接触从气流中回收尿素灰尘和氨的方法，从而形成硫酸铵和尿素的酸溶液，其特征在于将酸溶液浓缩至 熔体包含少于5重量％的水，该熔体随后转移到包含尿素和硫酸铵的固体颗粒中。
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