公开(公告)号：US11912649B2

公开(公告)日：2024-02-27

申请号：US17424948

申请日：2020-12-30

Applicant: STAMICARBON B.V.

Inventor： Rahul Patil ,  Branislav Manic ,  Petrus Anna Maria Robertus Simons

IPC: C07C273/14 ,  C07C273/04 ,  B01D53/00 ,  B01D53/58

CPC classification number: C07C273/14 ,  B01D53/002 ,  B01D53/58 ,  B01D2251/504 ,  B01D2251/506 ,  B01D2257/406 ,  B01D2257/80 ,  C07C273/04

Abstract: Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. Also disclosed is a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scrubbing section, the off-gas is brought into contact with an acidic scrubbing liquid so as to provide a scrubbed off-gas and a utilized scrubbing liquid comprising ammonium salt. The method specifies an evaporation section, which is part of the urea plant that produces urea melt, that is divided into first and second stages. The first stage is part of the urea melt production plant. The second stage decoupled, as regards recirculation of liquids other than the urea product stream, from the urea melt production plant. This is accomplished by sending utilized scrubbing liquid that contains ammonium salts to the second stage evaporation section, and by sending condensed vapours from said second stage evaporation section to said scrubbing section.

公开(公告)号：US11795140B2

公开(公告)日：2023-10-24

申请号：US18006046

申请日：2022-06-10

Applicant: STAMICARBON B.V.

Inventor： Josef Chroust ,  Wilhelmus Hubertus Geurts

IPC: C07C273/04 ,  B01J19/00 ,  B01D3/00 ,  B01D5/00 ,  B01D19/00

CPC classification number: C07C273/04 ,  B01D5/0003 ,  B01D5/0057 ,  B01D19/0036 ,  B01J19/002 ,  B01J2219/00024 ,  B01J2219/00245

Abstract: The disclosure pertains to a urea production plant and process using a high-pressure CO2 stripper, downstream medium-pressure treatment unit and a medium-pressure dissociator receiving urea synthesis solution from the reactor, wherein gas from the treatment unit and dissociator are condensed in a first condenser and off-gas from the synthesis section is condensed separately in a second condenser. A revamping method is also described.

公开(公告)号：US20230123681A1

公开(公告)日：2023-04-20

申请号：US18069690

申请日：2022-12-21

Applicant: STAMICARBON B.V.

Inventor： Kirk Anguah OFEI ,  Alexander Aleida Antonius SCHEERDER

IPC: C07C273/04 ,  B01D1/06 ,  B01D3/34 ,  B01J19/00 ,  B01J19/02 ,  C07C273/16 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/26

Abstract: The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation conditions in said reactor to form a urea synthesis solution comprising urea, water, carbamate and ammonia, wherein the process further comprises contacting a carbamate-containing liquid stream with an equipment part of said high pressure synthesis section that is made of a ferritic steel alloy.

公开(公告)号：US11331623B2

公开(公告)日：2022-05-17

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

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：US20220089527A1

公开(公告)日：2022-03-24

申请号：US17424948

申请日：2020-12-30

Applicant: STAMICARBON B.V.

Inventor： Rahul PATIL ,  Branislav MANIC ,  Petrus Anna Maria Robertus SIMONS

IPC: C07C273/14 ,  B01D53/58 ,  B01D53/00

Abstract: Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. Also disclosed is a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scrubbing section, the off-gas is brought into contact with an acidic scrubbing liquid so as to provide a scrubbed off-gas and a utilized scrubbing liquid comprising ammonium salt. The method specifies an evaporation section, which is part of the urea plant that produces urea melt, that is divided into first and second stages. The first stage is part of the urea melt production plant. The second stage decoupled, as regards recirculation of liquids other than the urea product stream, from the urea melt production plant. This is accomplished by sending utilized scrubbing liquid that contains ammonium salts to the second stage evaporation section, and by sending condensed vapours from said second stage evaporation section to said scrubbing section.

公开(公告)号：US20210245089A1

公开(公告)日：2021-08-12

申请号：US17273813

申请日：2020-05-22

Applicant: STAMICARBON B.V.

Inventor： Giusy Elisa PUCI ,  Wilfried Marc Renaat DIRKX

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

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：US20210187412A1

公开(公告)日：2021-06-24

申请号：US17114317

申请日：2020-12-07

Applicant: STAMICARBON B.V.

Inventor： Dorin POPA

IPC: B01D5/00 ,  B01J10/00 ,  C07C273/04 ,  C07C273/14 ,  F28D7/06 ,  F28F9/02

Abstract: Disclosed is a 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：US10988380B2

公开(公告)日：2021-04-27

申请号：US16732081

申请日：2019-12-31

Applicant: Stamicarbon B.V.

Inventor： Leonardus Hubertus Postma ,  Maria Paz Muñoz López ,  Martinus Voorwinden

IPC: B01D53/86 ,  B01D53/00 ,  C01B21/40 ,  C01B21/26 ,  B01D53/14

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.

公开(公告)号：US10954186B2

公开(公告)日：2021-03-23

申请号：US16424346

申请日：2019-05-28

Applicant: Stamicarbon B.V.

Inventor： Giusy Elisa Puci ,  Joey Dobree

IPC: C07C273/04 ,  B01D53/00 ,  C05C1/00 ,  B01D53/14 ,  C01C1/18 ,  C07C273/16

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.

公开(公告)号：US10913025B2

公开(公告)日：2021-02-09

申请号：US15536077

申请日：2015-12-17

Applicant: Stamicarbon B.V.

Inventor： Cain Christopher Doherty ,  Aloysius Mechteldis Emmanuel Schoenmakers

IPC: B01D47/05 ,  B01D47/06 ,  B01D47/10 ,  C05C9/00 ,  C07C273/04 ,  C07C273/02

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.