Patents Assigned to Stamicarbon B.V.
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Patent number: 11000817Abstract: 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: GrantFiled: December 18, 2019Date of Patent: May 11, 2021Assignee: STAMICARBON B.V.Inventors: Petrus Anna Maria Robertus Simons, Johannes Lambertus Kursten
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Patent number: 10988380Abstract: 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.Type: GrantFiled: December 31, 2019Date of Patent: April 27, 2021Assignee: Stamicarbon B.V.Inventors: Leonardus Hubertus Postma, Maria Paz Muñoz López, Martinus Voorwinden
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Patent number: 10975022Abstract: 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.Type: GrantFiled: July 24, 2020Date of Patent: April 13, 2021Assignee: STAMICARBON B.V.Inventors: Ronny Albert Mathijs Pustjens, Johan Albert Arno Van Den Tillaart
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Publication number: 20210094822Abstract: Disclosed is a catalyst suitable for the catalytic oxidative cracking of a H2S-containing gas stream. The catalyst comprises at least one or more active metals selected from the group consisting of iron, cobalt, and nickel, supported by a carrier comprising ceria and alumina. The active metal is preferably in the form of its sulphide. 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 composition claims.Type: ApplicationFiled: June 17, 2019Publication date: April 1, 2021Applicant: Stamicarbon B.V. Acting Under the Name of MT Innovation CenterInventors: Pierlorenzo CINOTTI, Michele COLOZZI, Simona CORTESE, Marino MICCIO, Emma PALO, Lucia BARBATO, Vincenzo PALMA, Daniela BARBA
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Patent number: 10954186Abstract: 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.Type: GrantFiled: May 28, 2019Date of Patent: March 23, 2021Assignee: Stamicarbon B.V.Inventors: Giusy Elisa Puci, Joey Dobree
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Publication number: 20210079310Abstract: 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: ApplicationFiled: November 25, 2020Publication date: March 18, 2021Applicant: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTERInventors: Michele COLOZZI, Emma PALO, Palma CONTALDO, Maria Rosaria PEPE, Vincenzo PALMA, Vincenzo VAIANO
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Patent number: 10919846Abstract: 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.Type: GrantFiled: December 18, 2019Date of Patent: February 16, 2021Assignee: Stamicarbon B.V.Inventors: Rahul Patil, Fredericus Henricus Maria Buitink
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Patent number: 10913025Abstract: 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.Type: GrantFiled: December 17, 2015Date of Patent: February 9, 2021Assignee: Stamicarbon B.V.Inventors: Cain Christopher Doherty, Aloysius Mechteldis Emmanuel Schoenmakers
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Patent number: 10882820Abstract: Disclosed is a novel method of controlling the formation of biuret in urea production. This is accomplished by reducing or preventing the formation of biuret in a concentration section, particularly in one or more concentrators or evaporators. The method comprises controlling the residence time of a urea aqueous stream treated in such concentration section in a manner independently of the volume flow per time interval of said stream into said concentration section. The residence time can be controlled, e.g., by providing the concentration section with an adjustable volume or by adding a gas to the urea stream to be treated. A combination of such measures can also be applied.Type: GrantFiled: August 9, 2019Date of Patent: January 5, 2021Assignee: Stamicarbon B.V.Inventor: Eelco Mostert
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Patent number: 10865355Abstract: 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: GrantFiled: August 15, 2017Date of Patent: December 15, 2020Assignee: STAMICARBON B.V.Inventors: Michele Colozzi, Emma Palo, Palma Contaldo, Maria Rosaria Pepe, Vincenzo Palma, Vincenzo Vaiano
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Patent number: 10857480Abstract: 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: GrantFiled: October 26, 2018Date of Patent: December 8, 2020Assignee: Stamicarbon B.V.Inventor: Dorin Popa
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Patent number: 10829444Abstract: 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.Type: GrantFiled: July 13, 2018Date of Patent: November 10, 2020Assignee: STAMICARBON B.V.Inventors: Juan Coloma González, Johannes Henricus Mennen
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Patent number: 10828593Abstract: 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, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber. As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.Type: GrantFiled: December 28, 2018Date of Patent: November 10, 2020Assignee: Stamicarbon B.V.Inventors: Petrus Catharina Gerlach Soons, Wilfried Marc Renaat Dirkx
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Publication number: 20200306663Abstract: 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: ApplicationFiled: October 26, 2018Publication date: October 1, 2020Applicant: Stamicarbon B.V.Inventor: Dorin POPPA
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Publication number: 20200283377Abstract: 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.Type: ApplicationFiled: July 13, 2018Publication date: September 10, 2020Applicant: STAMICARBON B.V.Inventors: Juan COLOMA GONZÁLEZ, Johannes Henricus MENNEN
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Patent number: 10766856Abstract: 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.Type: GrantFiled: November 27, 2019Date of Patent: September 8, 2020Assignee: STAMICARBON B.V.Inventor: Eelco Mostert
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Patent number: 10759745Abstract: 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.Type: GrantFiled: November 9, 2018Date of Patent: September 1, 2020Assignee: Stamicarbon B.V.Inventors: Ronny Albert Mathijs Pustjens, Johan Albert Arno Van Den Tillaart
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Publication number: 20200254419Abstract: 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: ApplicationFiled: April 24, 2020Publication date: August 13, 2020Applicant: Stamicarbon B.V.Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
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Patent number: 10730002Abstract: 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).Type: GrantFiled: April 24, 2017Date of Patent: August 4, 2020Assignee: Stamicarbon B.V.Inventors: Brian Sayre Higgins, John Marshall Tate, III, Robert Arthur Yates, Marcel Julien Pomerleau, Jon Michael Heon, Wilfried Marc Renaat Dirkx, Juan Coloma González
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Patent number: 10722831Abstract: 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).Type: GrantFiled: September 6, 2019Date of Patent: July 28, 2020Assignee: Stamicarbon B.V.Inventors: Brian Sayre Higgins, John Marshall Tate, III, Robert Arthur Yates, Marcel Julien Pomerleau, Jon Michael Heon, Wilfried Marc Renatt Dirkx, Juan Coloma González