Patents Assigned to Stamicarbon B.V.
  • Patent number: 11912649
    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.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: February 27, 2024
    Assignee: Stamicarbon B.V.
    Inventors: Rahul Patil, Branislav Manic, Petrus Anna Maria Robertus Simons
  • Patent number: 11905234
    Abstract: A method for the removal of ammonia from the off-gas of a finishing section of a urea production plant, a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scrubbing section, off-gas is brought into contact with acidic scrubbing liquid 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 is 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 containing ammonium salts to the second stage evaporation section, and condensed vapours from said second stage evaporation section to said scrubbing section.
    Type: Grant
    Filed: May 24, 2022
    Date of Patent: February 20, 2024
    Assignee: STAMICARBON B.V.
    Inventors: Rahul Patil, Branislav Manic, Petrus Anna Maria Robertus Simons
  • Patent number: 11814340
    Abstract: The disclosure pertains to an urea production plant and process using a thermal stripper, wherein the reaction mixture is separated in two parts, wherein the first part is supplied at least in part to the thermal stripper and the second part at least in part bypasses the thermal stripper and is supplied to a medium pressure recovery section.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: November 14, 2023
    Assignee: STAMICARBON B.V.
    Inventor: Wilhelmus Hubertus Geurts
  • Patent number: 11795140
    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.
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: October 24, 2023
    Assignee: STAMICARBON B.V.
    Inventors: Josef Chroust, Wilhelmus Hubertus Geurts
  • Patent number: 11772971
    Abstract: The disclosure pertains to a nitric acid production process and plant. The process involves supplying an oxygen gas stream and ammonia feedstock to the burner section. In embodiments, a part of the tail gas stream (4) is heated in a tail gas heating section (7) and supplied to the burner section (1).
    Type: Grant
    Filed: July 15, 2022
    Date of Patent: October 3, 2023
    Assignee: STAMICARBON B.V.
    Inventors: Carmen Pérez Salmerón, Aldo Maria Iaquaniello, Joey Dobree, Maria Paz Muñoz López
  • Patent number: 11766627
    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.
    Type: Grant
    Filed: April 19, 2022
    Date of Patent: September 26, 2023
    Assignee: STAMICARBON B.V.
    Inventor: Dorin Popa
  • Patent number: 11746084
    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.
    Type: Grant
    Filed: July 3, 2020
    Date of Patent: September 5, 2023
    Assignee: STAMICARBON B.V.
    Inventors: Kirk Anguah Ofei, Alexander Aleida Antonius Scheerder
  • Patent number: 11420937
    Abstract: A urea production process comprising concentrating a first urea solution in a first vacuum evaporator in an evaporation section to give a urea melt and a first vapor, and condensing the first vapor in a first condensation section, wherein the first condensation section is a chilled condensation section, and a urea production system comprising the chilled condensation section.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: August 23, 2022
    Assignee: STAMICARBON B.V.
    Inventor: Rahul Patil
  • Publication number: 20220249975
    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.
    Type: Application
    Filed: April 19, 2022
    Publication date: August 11, 2022
    Applicant: STAMICARBON B.V.
    Inventor: Dorin POPA
  • Patent number: 11338221
    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.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: May 24, 2022
    Assignee: STAMICARBON B.V.
    Inventor: Dorin Popa
  • Patent number: 11332437
    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.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: May 17, 2022
    Assignee: STAMICARBON B.V.
    Inventors: Rahul Patil, Petrus Anna Maria Robertus Simons, Branislav Manic
  • Patent number: 11331623
    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.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: May 17, 2022
    Assignee: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTER
    Inventors: Michele Colozzi, Emma Palo, Palma Contaldo, Maria Rosaria Pepe, Vincenzo Palma, Vincenzo Vaiano
  • Patent number: 11331593
    Abstract: A method is disclosed for stripping in a stripper a urea synthesis solution received from a urea forming process wherein ammonia and CO2 are reacted under urea forming conditions. The shell space of the stripper comprises a continuous vertical zone.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: May 17, 2022
    Assignee: STAMICARBON B.V.
    Inventors: Lambertus Wilhelmus Gevers, Juan Coloma González
  • Patent number: 11298646
    Abstract: Disclosed is a method for the removal of soluble particulate matter from a gas stream, such as urea dust from the off-gas of a finishing section of a urea production plant. The method comprises subjecting the off-gas to at least two quenching stages an aqueous quenching liquid. The quenching liquid used in a first, upstream quench stage, is allowed to have a higher concentration of dissolved particulate matter than the quenching liquid in the second, downstream quench stage. The quenched gas is led through a particle capture zone, typically comprising one or more of a wet scrubber, a Venturi scrubber, and a wet electrostatic precipitator.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: April 12, 2022
    Assignee: Stamicarbon B.V.
    Inventor: Brian Sayre Higgins
  • Patent number: 11241649
    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.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: February 8, 2022
    Assignee: STAMICARBON B.V.
    Inventors: Giusy Elisa Puci, Wilfried Marc Renaat Dirkx
  • Publication number: 20210331086
    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.
    Type: Application
    Filed: July 7, 2021
    Publication date: October 28, 2021
    Applicant: STAMICARBON B.V.
    Inventors: Joey DOBREE, Johannes Henricus MENNEN
  • Patent number: 11090627
    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.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: August 17, 2021
    Assignee: Stamicarbon B.V.
    Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
  • Patent number: 11083976
    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.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: August 10, 2021
    Assignee: Stamicarbon B.V.
    Inventors: Joey Dobree, Johannes Henricus Mennen
  • Publication number: 20210187412
    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.
    Type: Application
    Filed: December 7, 2020
    Publication date: June 24, 2021
    Applicant: STAMICARBON B.V.
    Inventor: Dorin POPA
  • Patent number: 11000817
    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.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: May 11, 2021
    Assignee: STAMICARBON B.V.
    Inventors: Petrus Anna Maria Robertus Simons, Johannes Lambertus Kursten