Patents Assigned to Stamicarbon B.V.
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Publication number: 20140206902Abstract: The invention relates to a method for urea production and to a urea production plant wherein ammonia emission in the final step of forming urea prills is reduced. In the method, the concentration of a urea solution is performed in at least three consecutive concentration steps and the residence time of urea melt leaving a last concentrator to the prilling tower is minimised. This can be achieved by placing the last concentrator in adjacency with a urea melt inlet of the prilling tower, such as above the prilling tower. In this way, the ammonia emission in the prilling tower can be reduced by as much as 50% compared to the conventional urea production plants. The invention further relates to a method for reducing ammonia emission in the prilling tower of an existing urea production plant.Type: ApplicationFiled: August 17, 2012Publication date: July 24, 2014Applicant: STAMICARBON B.V.Inventor: Johannes Henricus Mennen
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Publication number: 20140191898Abstract: Disclosed is a method of measuring the level of a liquid in a vessel, such as a chemical reactor, by radar. The method particularly pertains to situations wherein a supercritical fluid is present above the liquid. More particularly, the method serves to cope with the typical vigorous circumstances of a chemical reaction, such as urea synthesis. The invention foresees the use of a tube extending into the liquid, so as to guide the radar waves to the surface level of the liquid.Type: ApplicationFiled: September 3, 2012Publication date: July 10, 2014Applicant: STAMICARBON B.V.Inventor: Klement Riegman
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Publication number: 20140170052Abstract: Disclosed is a process for the production of ammonia comprising a step wherein synthesis gas is formed by catalytic partial oxidation. Also disclosed is a process of producing urea, wherein ammonia is formed in a process involving a step of catalytic partial oxidation, and carbon dioxide formed in the same process is reacted with said ammonia so as to form urea.Type: ApplicationFiled: June 25, 2012Publication date: June 19, 2014Applicant: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTERInventors: Gaetano Iaquaniello, Barbara Cucchiella, Elena Antonetti
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Publication number: 20140134096Abstract: Disclosed is a process for the concurrent production of hydrogen and sulphur from a H2S-containing gas stream, with reduced, and preferably zero, emissions. The method comprises the catalytic oxidative cracking of H2S so as to form H2 and S2. Preferably, the oxidation is conducted using oxygen-enriched air, preferably pure oxygen. The process is conducted in a reaction chamber comprising a bifunctional catalyst material, so as to favor both the partial oxidation of H2S and the dissociation thereof.Type: ApplicationFiled: May 7, 2012Publication date: May 15, 2014Applicant: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTERInventors: Fabio Angelini, Lucia Barbato
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Publication number: 20140103260Abstract: Disclosed is a process for the production of a syngas mixture by catalytic partial oxidation. The syngas mixture is suitable as an intermediate in the production of hydrogen. According to the invention, the syngas is cooled, prior to a water gas shift reaction, with liquid water. This has the advantage of avoiding the problem of metal dusting, and it presents a gas mixture comprising water vapor that is particularly suitable for a water gas shift reaction in the production of hydrogen.Type: ApplicationFiled: June 25, 2012Publication date: April 17, 2014Applicant: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTERInventors: Gaetano Iaquaniello, Barbara Cucchiella, Elena Antonetti
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Publication number: 20140090433Abstract: The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.Type: ApplicationFiled: December 5, 2013Publication date: April 3, 2014Applicant: STAMICARBON B.V.Inventors: Jozef Hubert MEESSEN, Pantelis ORFANIDIS
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Publication number: 20140047847Abstract: To start a combined cycle thermal plant for energy-production from an off-state to an operational state, once the minimum warm-up time of the steam turbine (ST) having been set, as well as the pressure of the warm-up steam, it is necessary to determine the steam optimum temperature to avoid stressing or straining the mechanical parts of the turbine itself.Type: ApplicationFiled: March 27, 2012Publication date: February 20, 2014Applicant: Stamicarbon B.V.Inventor: Ezio Pasqualon
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Publication number: 20140046094Abstract: Disclosed is a method for the production of urea allowing a substantial reduction, even down to zero, of the continuous emission of ammonia conventionally resulting from such a process. According to a preferred embodiment of the invention, the urea-forming reaction from carbon dioxide and ammonia is conducted in a synthesis section that does not require passivation by oxygen. As a result of the absence of oxygen, a hydrogen-rich gas stream results from the synthesis section, that can be used as a fuel in an incinerator. In the incinerator, ammonia-comprising gas streams from the urea production process are combusted.Type: ApplicationFiled: March 30, 2012Publication date: February 13, 2014Applicant: STAMICARBON B.V.Inventors: Johannes Henricus Mennen, Barbara Cucchiella
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Publication number: 20140018594Abstract: Disclosed is a process for the catalytic dehydrogenation of alkanes so as to form the corresponding olefins. The reaction mixture is subjected to membrane separation of hydrogen, in a separate unit. Preferably a plurality of alternating reaction and separation units is used. The process of the invention serves the purpose of reducing coke formation on the catalyst, and also of achieving a higher alkane conversion without a similar increase in coke formation. The process can also be used for the production of hydrogen.Type: ApplicationFiled: March 28, 2012Publication date: January 16, 2014Applicant: STAMICARBON B.V. ACTING UNDER THE NAME OF MT INNOVATION CENTERInventors: Emma Palo, Gaetano Iaquaniello
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Patent number: 8622325Abstract: The present invention relates to a process for the production of granules from a liquid composition with a decreased dust production, the process steps are as follows: applying the liquid composition onto solid particles that are kept in a continuous movement by a gas stream in a granulation zone of an oblong granulator, thereby depositing and solidifying liquid composition around the solid particles to increase the size of the particles and thereby form grown solid particles; discharging a stream of the grown solid particles from the granulation zone, dividing, in a size-sorting apparatus, the stream of grown solid particles into individual streams based on the size of the grown solid particles to thereby produce streams of undersized, oversized, and desired-sized grown solid particles; transferring the stream of oversized grown solid particles to a size-reducing apparatus; crushing the stream of oversized grown solid particles in the size-reducing apparatus, thereby reducing the particle size of the oversizType: GrantFiled: May 11, 2010Date of Patent: January 7, 2014Assignee: Stamicarbon B.V.Inventors: Jozef Hubert Meessen, Willem Frederik Roos, Johannes Lambertus Kursten
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Publication number: 20130216449Abstract: The invention relates to urea plant with a CO2 and NH3 feed, which comprises a purge line, characterized in that the purge line is connected with a fuel gas input line of a utility plant or an NH3 plant.Type: ApplicationFiled: June 24, 2011Publication date: August 22, 2013Applicant: STAMICARBON B.V.Inventor: Luc Louis Maria Dieltjens
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Publication number: 20130207035Abstract: The invention relates to process for the preparation of a urea-comprising aqueous stream, that is suitable for use in a unit for the reduction of NOx in combustion engine exhaust gases, wherein the urea-comprising aqueous stream is separated directly from or after a recovery section in a urea production process and is thereafter diluted with water until the urea-comprising stream comprises 30-35 wt % urea.Type: ApplicationFiled: January 30, 2013Publication date: August 15, 2013Applicant: STAMICARBON B.V.Inventor: Jozef Hubert MEESSEN
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Publication number: 20130055776Abstract: This invention relates to a coating composition for a fertilizer comprising at least 50 wt % of a cross-linked lipid; and less than 0.20 wt %, relative to the total weight of the lipid, of a catalyst for cross-linking an unsaturated lipid. The cross-linked lipid has a viscosity at 20 degree Celsius (° C.) in the range of 110 and 800 mPa·s.Type: ApplicationFiled: September 28, 2010Publication date: March 7, 2013Applicant: Stamicarbon B.V.Inventor: Stefan Hendrikus Schaafsma
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Patent number: 8377399Abstract: Process for increasing the capacity of an existing urea plant comprising a high-pressure urea synthesis section and one or more recovery sections, wherein next to the existing urea plant a urea production unit, comprising a high-pressure urea synthesis section and a medium-pressure recovery section, is installed, wherein a urea-containing stream is produced from ammonia and carbon dioxide and the urea-containing stream is sent to the existing urea plant where the urea-containing stream is further purified in the low-pressure recovery section.Type: GrantFiled: March 30, 2009Date of Patent: February 19, 2013Assignee: Stamicarbon B.V.Inventor: Johannes Henricus Mennen
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Publication number: 20120330060Abstract: Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. The method comprises contacting the off-gas with a solid adsorbent capable of physically adsorbing ammonia, particularly activated carbon or zeolite. Thereupon the solid adsorbent having ammonia adsorbed thereon is separated from the gas and regenerated by dissolving ammonia in an extraction liquid, preferably water. After separating the water from the solid adsorbent, the latter is re-used in the process.Type: ApplicationFiled: February 12, 2010Publication date: December 27, 2012Applicant: Stamicarbon B.V.Inventors: Johanna Eliasson, Ylva Eriksson, David Holmström, P. Christian Hulteberg, Hans T. Karlsson, Filip Nilsson, Frida Ojala, Johan Albert Arno Van Den Tillaart
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Publication number: 20120302789Abstract: The invention relates to a process for producing urea wherein an aqueous urea solution, leaving a urea reaction zone is fed to a stripper, where a part of the non-converted ammonia and carbon dioxide is separated from the aqueous urea solution, which solution leaves the stripper to a first recovery section of one or more serial recovery sections and is subsequently fed to one or more urea concentration sections, wherein the urea solution leaving the stripper is subjected to an adiabatic expansion, thus creating a vapor and a liquid, which are separated before the liquid enters a first recovery section and the vapor is condensed. The invention further relates to a urea plant comprising a stripper and a first recovery section, wherein an adiabatic expansion valve and a liquid/gas separator is provided between the stripper and the first recovery section.Type: ApplicationFiled: January 7, 2011Publication date: November 29, 2012Applicant: STAMICARBON B.V.Inventor: Johannes Henricus Mennen
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Patent number: 8283494Abstract: Process for the preparation of urea from ammonia and carbon dioxide in a urea production process comprising, in a high-pressure synthesis section: a. a reactor, wherein ammonia and carbon dioxide react to form a urea-comprising synthesis solution; b. a stripper, wherein the urea-comprising synthesis solution is heated and stripped, optionally in counter-current with a stripping agent; c. a submerged condenser, wherein the gas leaving the top of the stripper is, at least partially, condensed to form a condensate solution and d. an ejector, in the line connecting the submerged condenser and the reactor, supporting the transport of the condensate solution from the submerged condenser to the reactor, wherein a gas stream leaving the top of the submerged condenser is controlled by one or more controlling elements.Type: GrantFiled: December 3, 2007Date of Patent: October 9, 2012Assignee: Stamicarbon B.V.Inventors: Stephen Rudolf Alexander Zwart, Johannes Henricus Mennen
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Publication number: 20120240649Abstract: The invention relates to a method for recovery of urea dust and ammonia from a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea, characterized in that the acid solution is concentrated to a melt comprising less than 5 wt % of water, which melt is subsequently transferred into solid particles comprising urea and ammonium sulphate.Type: ApplicationFiled: August 10, 2010Publication date: September 27, 2012Applicant: Stamicarbon B.V.Inventors: Jozef Hubert Meessen, Pantelis Orfanidis
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Publication number: 20120231277Abstract: The present invention relates to a process for the preparation of granules comprising the steps of: providing a granulation zone comprising particles, the particles being kept in motion; providing a first feed stream comprising a liquid composition into the granulation zone, the liquid composition being applied onto or over the moving particles in the granulation zone; withdrawing a product stream comprising granules from the granulation zone, the granules being the result of layered growth of the moving particles in the granulation zone; wherein a second feed stream comprising granulation nuclei is fed into the granulation zone, wherein the granulation nuclei have a particle size distribution characterized by a standard deviation of the particle size that is less than 15% of the mean particle size, and wherein the second feed stream comprises between 0.05 wt % and 50 wt % of the product stream.Type: ApplicationFiled: August 10, 2010Publication date: September 13, 2012Applicant: Stamicarbon B.V.Inventors: Willem Frederik Roos, Fredericus Henricus Maria Buitink
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Patent number: 8236086Abstract: Coated fertilizer wherein the fertilizer comprises fertilizer particles coated with a biomass composition comprising 1-60 wt. % solid biomass particles with a D50 between 0 and 150 ?m and 99-40 wt. % oil, a biomass composition wherein the biomass composition comprises solid biomass particles with a D50 between 0 and 150 ?m and a process for the production of a biomass composition wherein a biomass composition comprising solid particles having a D50 between 30 and 500 ?m is filtrated and the residue is grinded until the solid particles have a D50 between 0 and 150 ?m.Type: GrantFiled: June 29, 2007Date of Patent: August 7, 2012Assignee: Stamicarbon B.V.Inventors: Richard Johannes Matheus Janssen, Stefan Hendrikus Schaafsma, Theodorus Marie Leopold Evers