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公开(公告)号：US20190224610A1
公开(公告)日：2019-07-25
申请号：US16300434
申请日：2017-05-09
Applicant: Stamicarbon B.V.
Inventor： Brian Sayre HIGGINS , John Marshall TATE, III , Robert Arthur YATES , Marcel Julien POMERLEAU , Jon Michael HEON , Wilfried Marc Renaat DIRKX , Juan Coloma González
Abstract: Disclosed are methods and systems for removing submicron particles from a gas stream, in particular from urea prilling off-gas, wherein a Venturi ejector is used. A method comprises contacting a gas stream containing submicron particles in a Venturi ejector with an injected high velocity scrubbing liquid to provide a pumping action, wherein the scrubbing liquid has an initial velocity of at least 2 m/s and wherein the ratio of scrubbing liquid and gas flow is between 0.0005 and 0.0015 (m3/h)/(m3/h). The disclosure also pertains to a prilling tower having a gas stream treatment system comprising a Venturi ejector at the top of the prilling tower, and to a method of modifying an existing prilling tower.
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公开(公告)号：US20190185422A1
公开(公告)日：2019-06-20
申请号：US16186410
申请日：2018-11-09
Applicant: Stamicarbon B.V.
IPC: C07C273/04 , C07C273/14 , B01D5/00 , B01J19/00
Abstract: Processes and plants for the production of purified urea solution are described. In a described urea production process, urea is produced in a synthesis section without a high pressure stripper and the urea solution is subjected to purification after the recovery section, to give purified urea solution and off-gas. The purification comprises e.g. steam stripping.
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公开(公告)号：US10207216B2
公开(公告)日：2019-02-19
申请号：US14902831
申请日：2014-07-04
Applicant: Stamicarbon B.V.
IPC: B01D47/10 , B01D47/06 , C07C273/02
Abstract: Disclosed is a method for the removal of urea dust from the off-gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber (11). As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.
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公开(公告)号：US10035971B2
公开(公告)日：2018-07-31
申请号：US15327358
申请日：2015-05-11
Applicant: STAMICARBON B.V.
Inventor： Cinzia Chiappe , Christian Pomelli , Andrea Mezzetta , Barbara Masciocchi , Alessio Gentile
CPC classification number: C11B1/10 , C11B1/04 , C12N1/06 , C12N1/12 , C12P7/6463
Abstract: In the present invention a method for treating algae is disclosed, which method comprises the steps of (a) providing an ionic liquid, which is a conjugate of an organic base with pKa at least 6 and an acid, (b) providing algae, (c) subjecting algae to cell lysis with the ionic liquid, whereby at least two phases are formed, including a hydrophobic phase and a hydrophilic phase, and (d) separating the hydrophobic phase containing lipids.
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公开(公告)号：US20180201551A1
公开(公告)日：2018-07-19
申请号：US15742488
申请日：2016-07-06
Applicant: STAMICARBON B.V.
Inventor： Petrus Catharina Gerlach SOONS , Stefan H. SCHAAFSMA
Abstract: Disclosed is a method of making a granulate of a urea product comprising urea and a salt, such as urea ammonium sulfate, having a high content of the salt. The high content is such as to provide an amount of the salt above the limit of solubility of the salt in urea. The granulate of the invention is characterized by having a smooth surface, which, e.g. in the event of urea ammonium sulfate, is not normally the case for granulate having the aforementioned high ammonium sulfate content. According to the invention this is realized by dividing the feed liquids to granulation. This division is based on non-final granulation liquids of a sufficiently high content of the salt, and a final granulation liquid (determining the surface) having a salt content of below the solubility limit of the salt, or no salt at all. E.g. in the event of urea ammonium sulfate, the non-final granulation liquids possibly are a slurry of urea and more than 20 wt. % of ammonium sulfate. The final granulation liquid then has 0-20 wt. % of ammonium sulfate, i.e. below the solubility limit.
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Patent Agency Ranking
公开(公告)号：US09981849B2
公开(公告)日：2018-05-29
申请号：US14989696
申请日：2016-01-06
Applicant: STAMICARBON B.V.
Inventor： Fabio Angelini , Lucia Barbato
CPC classification number: C01B17/0495 , B01D53/8612 , B01D2251/102 , B01D2256/16 , B01J8/00 , C01B3/02 , C01B3/04 , C01B17/0404 , C01B17/0408 , C01B17/0426 , Y02E60/364 , Y02P20/129
Abstract: Disclosed is a process for the concurrent production of hydrogen and sulphur from a H2S-containing gas stream, with reduced, and preferably zero, emissions. The method comprises the catalytic oxidative cracking of H2S so as to form H2 and S2. Preferably, the oxidation is conducted using oxygen-enriched air, preferably pure oxygen. The process is conducted in a reaction chamber comprising a bifunctional catalyst material, so as to favor both the partial oxidation of H2S and the dissociation thereof.
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公开(公告)号：US09914107B2
公开(公告)日：2018-03-13
申请号：US14655680
申请日：2013-12-27
Applicant: Stamicarbon B.V.
IPC: B01J19/00 , B01D3/00 , C07C273/04
CPC classification number: B01J19/00 , B01D3/009 , B01J2219/00024 , B01J2219/00027 , B01J2219/0004 , B01J2219/185 , C07C273/04 , Y10T29/49718
Abstract: Disclosed is a method of increasing the capacity of an existing urea plant. With reference to the regular components of a urea plant, including a synthesis section comprising a high pressure carbamate condenser and a reactor, and a recovery section, the method comprises installing an additional reactor between the recovery section and the high pressure carbamate condenser. The additional reactor is preferably installed in connection with an ejector, so as to allow ground placement of the additional reactor.
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公开(公告)号：US09732033B2
公开(公告)日：2017-08-15
申请号：US15246334
申请日：2016-08-24
Applicant: Stamicarbon B.V.
Inventor： Johannes Henricus Mennen , Jozef Hubert Meessen
IPC: C07C273/04 , B01D5/00 , B01D47/00 , B23P15/26 , B01J10/00
CPC classification number: C07C273/04 , B01D5/006 , B01D5/009 , B01D47/00 , B01J10/00 , B23P15/26 , Y10T29/49352
Abstract: Disclosed is a plant for the production of urea. The plant comprises conventional sections for synthesis and recovery, for evaporation and condensation, for urea finishing, and for dust scrubbing. According to the invention, an additional evaporation and condensation loop is introduced from and to the dust scrubbing section. This loop results in a more favorable energy consumption of the plant.
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公开(公告)号：US20170106355A1
公开(公告)日：2017-04-20
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 aluminium. 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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公开(公告)号：US09512069B2
公开(公告)日：2016-12-06
申请号：US14655330
申请日：2013-12-27
Applicant: Stamicarbon B.V.
IPC: C07C273/04 , B01J19/24 , B01J19/02
CPC classification number: C07C273/04 , B01J19/02 , B01J19/24 , B01J19/245 , B01J2219/00006 , B01J2219/00024 , B01J2219/00103 , B01J2219/00765 , B01J2219/0286 , B01J2219/24 , C07C275/02
Abstract: Disclosed is a urea plant comprising an additional reactor. With reference to the regular components of a urea plant, including a recovery section and a high pressure carbamate condenser, the additional reactor is positioned between the recovery section and the high pressure carbamate condenser. The invention also relates to a process for the synthesis of urea, comprising an additional reaction step converting, at an earlier stage than conventional, recovered carbamate into urea.
Abstract translation: 公开了一种包含另外的反应器的尿素装置。 参考包括回收部分和高压氨基甲酸酯冷凝器的尿素装置的常规部件，附加反应器位于回收部分和高压氨基甲酸酯冷凝器之间。 本发明还涉及一种用于合成尿素的方法，其包括另外的反应步骤，其比在常规方法中将回收的氨基甲酸酯转化成尿素的步骤更好。
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