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

IPC: B01D47/05 ,  B01D47/06 ,  B01D47/10 ,  B01D47/12 ,  B01D53/58 ,  B01D53/78 ,  B01J2/16 ,  C07C273/16

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.

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.

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.

Inventor： Petrus Anna Maria Robertus SIMONS ,  Johannes Lambertus KURSTEN

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.

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

IPC: C07C273/16 ,  B01D53/58 ,  B01D53/73 ,  B01D47/10 ,  B01J2/04 ,  B01J4/00

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.

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.

公开(公告)号：US10654719B2

公开(公告)日：2020-05-19

申请号：US14757761

申请日：2015-12-23

Applicant: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTER

Inventor： Lucio Molinari ,  Fabio Angelini ,  Lucia Barbato

IPC: C01B17/04 ,  C01B3/02 ,  C01B3/04 ,  C01B3/06 ,  B01D53/86 ,  B01J19/24

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.

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.

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

IPC: B01D47/10 ,  B01D47/06 ,  B01D47/12 ,  B01D53/40 ,  B01D53/58 ,  B01D53/79 ,  B01J2/04

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.

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.

Inventor： Ronny Albert Mathijs PUSTJENS ,  Johan Albert Arno VAN DEN TILLAART

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.

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.

Inventor： Petrus Catharina Gerlach Soons ,  Wilfried Marc Renaat Dirkx

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.