公开(公告)号：US11090627B2

公开(公告)日：2021-08-17

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: B01J19/00 ,  B01J19/02 ,  B22F3/15 ,  C07C27/04 ,  C22C33/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58 ,  F28F21/08 ,  C07C273/04 ,  C22C38/00

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; Si
0-0.8; Mn
0-4.0; Cr
more than 29-35; Ni
3.0-10;  Mo
0-4.0; N
0.30-0.55;   Cu
0-0.8; W
0-3.0; S
 0-0.03; Ce
0-0.2; 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：US11083976B2

公开(公告)日：2021-08-10

申请号：US15560460

申请日：2016-03-29

Applicant: Stamicarbon B.V.

Inventor： Joey Dobree ,  Johannes Henricus Mennen

IPC: B01J19/24 ,  C01C1/18 ,  C07C273/04 ,  B01D3/00 ,  C05C9/00 ,  C05C1/00 ,  C07C273/02 ,  C05G5/23 ,  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 prodution, is mixed with ammonium nitrate so as to obtain UAN.

公开(公告)号：US11000817B2

公开(公告)日：2021-05-11

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 ,  C05G5/12 ,  C05C9/00 ,  C07C273/02 ,  B05B7/04 ,  B01J8/18 ,  B01J8/24 ,  B01J19/26 ,  B05B7/10

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：US20210079310A1

公开(公告)日：2021-03-18

申请号：US17104644

申请日：2020-11-25

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

Inventor： Michele COLOZZI ,  Emma PALO ,  Palma CONTALDO ,  Maria Rosaria PEPE ,  Vincenzo PALMA ,  Vincenzo VAIANO

IPC: C10L3/10 ,  B01J23/06 ,  B01J23/22 ,  B01J23/26 ,  B01J23/28 ,  B01J23/34 ,  B01J23/46 ,  B01J23/745 ,  B01J23/755 ,  B01D53/14 ,  B01D53/48 ,  B01J19/24 ,  C07C7/148

Abstract: Disclosed is method for removing carbonyl sulphide and/or carbon disulphide from a sour gas stream. The method comprises subjecting the gas stream to simultaneous contact with an absorption liquid, such as an aqueous amine solution, and with a catalyst suitable for hydrolyzing carbonyl sulphide and/or carbon disulphide. To this end, the invention also provides a reactor system wherein both an absorption liquid and a catalyst are present. In a preferred embodiment, the catalyst is a heterogeneous catalyst present on or in an absorption column, either coated on the trays of a column with trays, or contained in the packing of a packed column.

公开(公告)号：US10919846B2

公开(公告)日：2021-02-16

申请号：US16961319

申请日：2019-12-18

Applicant: Stamicarbon B.V.

Inventor： Rahul Patil ,  Fredericus Henricus Maria Buitink

IPC: C07C273/14 ,  C07C273/04 ,  B01J3/04 ,  B01D5/00 ,  B01D3/06 ,  B01D3/00

Abstract: The invention pertains to a urea production process using a high pressure stripper and a low pressure decomposer connected to a low pressure carbamate condenser which is in heat exchanging contact through a wall with a sub-atmospheric decomposer wherein urea solution obtained from the low pressure decomposer is processed.

公开(公告)号：US10766856B2

公开(公告)日：2020-09-08

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 ,  C07C275/02 ,  C07C275/62

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：US10710047B2

公开(公告)日：2020-07-14

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 ,  B22F3/15 ,  C07C273/04 ,  C22C33/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58 ,  F28F21/08

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：US20190388823A1

公开(公告)日：2019-12-26

申请号：US16563696

申请日：2019-09-06

Applicant: Stamicarbon B.V.

Inventor： Brian Sayre HIGGINS ,  John Marshall TATE, III ,  Robert Arthur YATES ,  Marcel Julien POMERLEAU ,  Jon Michael HEON ,  Wilfried Marc Renatt DIRKX ,  Juan Coloma GONZÁLEZ

IPC: B01D47/10 ,  B01J2/04 ,  B01D53/40 ,  B01D53/58 ,  B01D53/79 ,  B01D47/05 ,  B01D47/06 ,  B01D47/12 ,  C07C273/16

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 25 m/s and wherein the ratio of scrubbing liquid and gas flow is between 0.0005 and 0.0015 (m3/h)/(m3/h).

公开(公告)号：US10376859B2

公开(公告)日：2019-08-13

申请号：US15576214

申请日：2017-03-30

Applicant: STAMICARBON B.V.

Inventor： Juan Coloma González ,  Luc Louis Maria Dieltjens ,  Johannes Henricus Mennen

IPC: B01J19/00 ,  B01J19/18 ,  B01J19/24 ,  B01D3/06 ,  B01D3/14 ,  B01D5/00 ,  C07C273/04 ,  C07C275/02 ,  B01L3/06 ,  B01L3/14

Abstract: The invention is directed to a urea plant with a high pressure synthesis section and a recovery section. The high pressure synthesis section comprises a reactor, a stripper and a condenser, wherein the reactor operates at a higher pressure than the stripper and the condenser. The plant further includes a compression unit between the condenser and the reactor. The compression unit utilizes mechanical energy recovered from a decompression unit positioned downstream of the stripper and upstream of the recovery section.

公开(公告)号：US20190218097A1

公开(公告)日：2019-07-18

申请号：US15768510

申请日：2017-09-19

Applicant: Stamicarbon B.V.

Inventor： Leonardus Hubertus POSTMA ,  Maria Paz MUÑOZ LÓPEZ ,  Martinus VOORWINDEN

IPC: C01B21/40 ,  B01D53/00 ,  B01D53/86

CPC classification number: C01B21/40 ,  B01D53/002 ,  B01D53/14 ,  B01D53/1493 ,  B01D53/8625 ,  B01D53/8631 ,  B01D2252/103 ,  B01D2257/404 ,  C01B21/26 ,  Y02C20/20

Abstract: Disclosed is a dual pressure plant for the production of nitric acid on the basis of the oxidation of ammonia. The plant comprises a reactor configured to produce a burner gas stream; a gas cooling section configured to form a cooled burner gas; a condensation section configured to form an aqueous nitric acid condensate and an uncondensed nitrogen oxides gas stream; an absorption section configured to produce raw nitric acid and a tail gas; and a tail gas treatment system configured to form a purified tail gas. In a tail gas heating section a further heat exchanger configured to receive heat from the burner gas stream, said further heat exchanger being positioned relatively close to the reactor.