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公开(公告)号：US11331593B2
公开(公告)日：2022-05-17
申请号：US17423139
申请日：2020-06-05
Applicant: STAMICARBON B.V.
Inventor： Lambertus Wilhelmus Gevers , Juan Coloma González
IPC: B01D1/06 , B01D1/28 , B01D19/00 , C07C273/18 , C07C273/04
Abstract: A method is disclosed for stripping in a stripper a urea synthesis solution received from a urea forming process wherein ammonia and CO2 are reacted under urea forming conditions. The shell space of the stripper comprises a continuous vertical zone.
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公开(公告)号：US20220089529A1
公开(公告)日：2022-03-24
申请号：US17424958
申请日：2020-12-30
Applicant: STAMICARBON B.V.
Inventor： Rahul PATIL , Petrus Anna Maria Robertus SIMONS , Branislav MANIC
Abstract: The disclosure pertains to a urea production process using a first and a downstream second evaporator in an evaporation section, a finishing section and a scrubber for treating off-gas of the finishing section. Condensate from the condenser of the second evaporator is supplied to the scrubber.
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公开(公告)号：US20220089528A1
公开(公告)日：2022-03-24
申请号：US17424940
申请日：2020-12-30
Applicant: STAMICARBON B.V.
Inventor： Rahul PATIL
IPC: C07C273/16 , B01D5/00 , C07C273/04
Abstract: The disclosure pertains to a urea production process comprising concentrating a first urea solution in a first vacuum evaporator in an evaporation section to give a urea melt and first vapor, and condensing said first vapor in a first condensation section, wherein the first condensation section is a chilled condensation section.
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公开(公告)号：US11241649B2
公开(公告)日：2022-02-08
申请号：US17273813
申请日：2020-05-22
Applicant: STAMICARBON B.V.
Inventor： Giusy Elisa Puci , Wilfried Marc Renaat Dirkx
Abstract: Disclosed is a urea finishing method including an off-gas treatment, the method comprising urea finishing and supplying the off-gas to a quenching zone and to a scrub column comprising a sump and a venturi stage, wherein the sump has a split sump configuration with two compartments.
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公开(公告)号：US10857480B2
公开(公告)日：2020-12-08
申请号：US16469129
申请日：2018-10-26
Applicant: Stamicarbon B.V.
Inventor： Dorin Popa
IPC: B01D5/00 , C07C273/04 , C07C273/14 , B01J10/00 , F28D7/06 , F28F9/02 , F28D21/00
Abstract: Described are a high pressure carbamate condenser, urea plant, and urea production process. The high pressure carbamate condenser as described is of the shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.
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Patent Agency Ranking
公开(公告)号：US20200376453A1
公开(公告)日：2020-12-03
申请号：US16961481
申请日：2019-12-18
Applicant: STAMICARBON B.V.
IPC: B01J2/16 , C05C9/00 , C05G5/12 , C07C273/02
Abstract: A fluidized bed granulator for granulation with urea or urea-containing liquids is described, wherein the granulation liquid is supplied via a supply manifold comprising a header and risers. The risers are at least in part provided inside channels for secondary gas.
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公开(公告)号：US20200283377A1
公开(公告)日：2020-09-10
申请号：US16472792
申请日：2018-07-13
Applicant: STAMICARBON B.V.
Inventor： Juan COLOMA GONZÁLEZ , Johannes Henricus MENNEN
Abstract: The invention pertains to a finishing process for urea-comprising material, a plant for finishing urea-comprising material, a method of modifying an existing plant, and a use. Methods are disclosed for preventing the clogging of the conduit for off-gas between the finishing section and the treatment section.
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108.发明申请公开(公告)号：US20200254419A1
公开(公告)日：2020-08-13
申请号：US16858492
申请日：2020-04-24
Applicant: Stamicarbon B.V.
Inventor： Linn LARSSON , Daniel GULLBERG , Ulf KIVISÄKK , Martin ÖSTLUND , Alexander Aleida Antonius SCHEERDER
IPC: B01J19/02 , B22F3/15 , C22C33/02 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/58 , F28F21/08 , C07C273/04 , C22C38/00 , C22C38/02 , C22C38/04
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：US10654719B2
公开(公告)日：2020-05-19
申请号：US14757761
申请日：2015-12-23
Inventor： Lucio Molinari , Fabio Angelini , Lucia Barbato
Abstract: Disclosed is a process for the concurrent production of hydrogen and sulphur from a H2S-containing gas stream, with zero emissions. The method comprises the thermal oxidative cracking of H2S so as to form H2 and S2. Preferably, the oxidation is conducted using oxygen-enriched air, preferably pure oxygen. The ratio H2S/O2 in the feedstock is higher than 2:1, preferably in the range of 3:1-5:1.
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公开(公告)号：US20200095196A1
公开(公告)日：2020-03-26
申请号：US16698734
申请日：2019-11-27
Applicant: STAMICARBON B.V.
Inventor： Eelco MOSTERT
IPC: C07C273/04 , B01D53/58 , C07C273/16 , B01J4/00
Abstract: Disclosed is a novel method of controlling the formation of biuret in urea production, and particularly reducing, preventing or reversing such formation. This is accomplished by adding liquid ammonia to a urea aqueous stream. This addition is done at one or more positions downstream of a recovery section in a urea plant. The addition of liquid ammonia serves to shift the equilibrium of biuret formation from urea, to the side of the formation of urea from biuret and ammonia. The invention can be accomplished also in pre-existing urea plant, by the simple measure of providing an appropriate inlet for liquid ammonia, in fluid communication with a source of such liquid ammonia.
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