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公开(公告)号：US11332437B2
公开(公告)日：2022-05-17
申请号：US17424958
申请日：2020-12-30
Applicant: STAMICARBON B.V.
Inventor： Rahul Patil , Petrus Anna Maria Robertus Simons , Branislav Manic
IPC: C07C273/16 , B01D5/00 , B01D53/78 , C02F1/02 , C02F1/20 , B01D53/54 , C02F103/36 , B01D1/00
Abstract: A urea production process which includes and a synthesis section, a recovery section and evaporation section and a finishing section wherein the evaporation section includes a first evaporator and downstream thereof a second evaporator for urea solution. The second evaporator operates a lower pressure than the first evaporator to provide a urea melt and second vapor, solidifying the urea melt in a finishing section to provide a solid urea produce and off gas, scrubbing the off gas followed by condensing to produce a first condensate and second condensate; supplying the first condensate to a wastewater treatment section and supply the second condensate to the scrubber wherein the second condensate is used as a scrub liquid in the scrubber.
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公开(公告)号：US20210331086A1
公开(公告)日：2021-10-28
申请号：US17368924
申请日：2021-07-07
Applicant: STAMICARBON B.V.
Inventor： Joey DOBREE , Johannes Henricus MENNEN
IPC: B01D3/00 , C01C1/18 , C05C9/00 , C07C273/04 , C05C1/00 , C07C273/02 , C05G5/23 , B01J19/24 , B01J19/00 , C07C273/10 , C07C275/02
Abstract: Disclosed is a method for the integrated production of two different urea products. One is an aqueous urea solution suitable for use in NOx abatement (generally indicated as Diesel Exhaust Fluid DEF). The other is a solution used as a fertilizer, viz. Urea Ammonium Nitrate (UAN). The production of DEF and UAN are integrated as follows: ammonia recovered from the production of urea is used as a feed to the production of ammonium nitrate. At least part of an aqueous urea stream from urea production, is mixed with ammonium nitrate so as to obtain UAN.
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公开(公告)号：US20210129069A1
公开(公告)日：2021-05-06
申请号：US17141328
申请日：2021-01-05
Applicant: STAMICARBON B.V.
IPC: B01D47/10 , C05C9/00 , C07C273/04 , C07C273/02 , B01D47/05 , B01D47/06
Abstract: 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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424.发明申请公开(公告)号：US20210094822A1
公开(公告)日：2021-04-01
申请号：US16630423
申请日：2019-06-17
Inventor： Pierlorenzo CINOTTI , Michele COLOZZI , Simona CORTESE , Marino MICCIO , Emma PALO , Lucia BARBATO , Vincenzo PALMA , Daniela BARBA
Abstract: Disclosed is a catalyst suitable for the catalytic oxidative cracking of a H2S-containing gas stream. The catalyst comprises at least one or more active metals selected from the group consisting of iron, cobalt, and nickel, supported by a carrier comprising ceria and alumina. The active metal is preferably in the form of its sulphide. Also disclosed is a method for the production of hydrogen from a H2S-containing gas stream, comprising subjecting the gas stream to catalytic oxidative cracking so as to form H2 and S2, using a catalyst in accordance with any one of the composition claims.
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公开(公告)号：US10654758B2
公开(公告)日：2020-05-19
申请号：US16569479
申请日：2019-09-12
Applicant: Stamicarbon B.V.
Inventor： Giusy Elisa Puci , Joey Dobree
IPC: C05C9/00 , C05C1/00 , C01C1/18 , C07C273/04 , B01J12/00 , B01J14/00 , B01D53/58 , B01D53/14 , B01D53/78 , B01J19/24
Abstract: The invention relates to a process for the production of urea ammonium nitrate, a system and a method of modifying a plant. The process comprises treating ammonia-containing off-gas resulting from the production of ammonium nitrate (AN off-gas) with acidic scrubbing liquid in a finishing treatment section having a gas inlet in fluid communication with a gas outlet of a finishing section of a urea production unit, wherein the finishing section is adapted to solidify urea liquid, and wherein said finishing treatment section is adapted to subject ammonia-containing off-gas of the finishing section to treatment with an acidic scrubbing liquid.
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Patent Agency Ranking
公开(公告)号：US20190276392A1
公开(公告)日：2019-09-12
申请号：US16424346
申请日：2019-05-28
Applicant: Stamicarbon B.V.
Inventor： Giusy Elisa PUCI , Joey DOBREE
IPC: C07C273/04 , C07C273/16 , B01D53/14 , C05C1/00 , B01D53/00 , C01C1/18
Abstract: The invention relates to a process for the production of urea ammonium nitrate, a system and a method of modifying a plant. The process comprises subjecting ammonia-containing off-gas resulting from the production of ammonium nitrate (AN off-gas) to condensation under acidic conditions so as to form an acidic condensate, and using at least part of the acidic condensate as an acidic scrubbing liquid in a finishing treatment section having a gas inlet in fluid communication with a gas outlet of a finishing section of a urea production unit, wherein the finishing section is adapted to solidify urea liquid, and wherein said finishing treatment section is adapted to subject ammonia-containing off-gas of the finishing section to treatment with an acidic scrubbing liquid.
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公开(公告)号：US10370326B2
公开(公告)日：2019-08-06
申请号：US15573452
申请日：2016-12-21
Applicant: Stamicarbon B.V.
Inventor： Giusy Elisa Puci , Joey Dobree
IPC: C07C273/16 , C07C273/04 , C05C1/00 , B01D53/00 , B01D53/14 , C01C1/18
Abstract: The invention relates to a process for the production of urea ammonium nitrate, a system and a method of modifying a plant. The process comprises subjecting ammonia-containing off-gas resulting from the production of ammonium nitrate (AN off-gas) to condensation under acidic conditions so as to form an acidic a acidic scrubbing liquid in a finishing treatment section having a gas inlet in fluid communication with a gas outlet of a finishing section of a urea production unit, wherein the finishing section is adapted to solidify urea liquid, and wherein said finishing treatment section is adapted to subject ammonia-containing off-gas of the finishing section to treatment with an acidic scrubbing liquid.
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公开(公告)号：US20190015811A1
公开(公告)日：2019-01-17
申请号：US15576214
申请日：2017-03-30
Applicant: STAMICARBON B.V.
IPC: B01J19/18 , B01D5/00 , C07C273/04 , C07C275/02
CPC classification number: B01J19/1837 , B01D3/06 , B01D3/14 , B01D5/006 , B01D2257/406 , B01D2257/504 , B01J19/24 , B01J2219/00006 , B01J2219/00018 , B01J2219/00024 , B01J2219/00038 , B01J2219/0004 , B01J2219/00051 , B01J2219/00087 , B01J2219/00092 , B01J2219/00162 , C07C273/04 , C07C275/02 , Y02P20/582
Abstract: Disclosed is a urea plant wherein, in deviation from conventional plants, a high-pressure synthesis section is operated with two different pressures. The synthesis section comprises a reactor, which is operated under a first high pressure. The synthesis section also comprises a stripper and a condenser, both operated at substantially the same second high pressure. In accordance with the invention, the first pressure is substantially higher than the second pressure. The disclosed plant particularly comprises a compression unit capable of converting a pressure difference into work, or more specifically, mechanical energy for compression. This compression unit is positioned between a liquid outlet of the condenser and a liquid inlet of the reactor, and in fluid communication therewith. In order to make use of a pressure drop (expansion as a result of a liquid being depressurized), said compression unit is configured to obtain compression energy from one or more events in the urea production process (i.e., at one or more points in the urea production plant), at which a loss of energy occurs, such as decompression of a high energy stream. Typically, the compression unit is thereby configured to utilize mechanical energy recovered from a decompression unit positioned downstream of the stripper and upstream of the recovery section.
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公开(公告)号：US20180290937A1
公开(公告)日：2018-10-11
申请号：US15573448
申请日：2016-12-21
Applicant: Stamicarbon B.V.
Inventor： Giusy Elisa PUCI , Joey DOBREE
IPC: C05C1/00 , C01C1/18 , B01J12/00 , B01J14/00 , B01J19/24 , C07C273/04 , B01D53/58 , B01D53/78 , B01D53/14
Abstract: The invention relates to a process for the production of urea ammonium nitrate, a system and a method of modifying a plant. The process comprises treating ammonia-containing off-gas resulting from the production of ammonium nitrate (AN off-gas) with acidic scrubbing liquid in a finishing treatment section having a gas inlet in fluid communication with a gas outlet of a finishing section of a urea production unit, wherein the finishing section is adapted to solidify urea liquid, and wherein said finishing treatment section is adapted to subject ammonia-containing off-gas of the finishing section to treatment with an acidic scrubbing liquid.
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公开(公告)号：US09981253B2
公开(公告)日：2018-05-29
申请号：US15395093
申请日：2016-12-30
Inventor： Michele Colozzi , Lucia Barbato , Fabio Angelini , Emma Palo , Vincenzo Palma , Vincenzo Vaiano
CPC classification number: B01J27/0515 , B01J23/881 , B01J35/08 , B01J37/0201 , B01J37/0207 , B01J37/0215 , B01J37/08 , B01J37/20 , C01B3/04 , C01B17/046 , C01B17/0465 , C01B17/0495 , Y02E60/364
Abstract: Disclosed is a catalyst suitable for the catalytic oxidative cracking of a H2S-containing gas stream, particularly in the event that the stream also contains methane and/or ammonia. The catalyst comprises iron and molybdenum supported by a carrier comprising aluminum. The carrier preferably is alumina. The iron and molybdenum preferably are in the form of sulphides. Also disclosed is a method for the production of hydrogen from a H2S-containing gas stream, comprising subjecting the gas stream to catalytic oxidative cracking so as to form H2 and S2, using a catalyst in accordance with any one of the preceding claims.
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