Patents Assigned to Casale SA
  • Tube heat exchange unit for internals of heat exchangers reactors
    Patent number: 10655921
    Abstract: Tube-bundle heat exchange unit (1) for internals of heat exchangers or reactors, comprising: at least one tube bundle (2); a plurality of baffles (3) associated with said tube bundle and defining through-openings according to a predefined arrangement, each opening being passed through by one of more tubes of the tube bundle, and a shell (6) which surrounds said tube bundle and said baffles, wherein the assembly of the tube bundle and the shell can be disassembled and the shell is structurally collaborating with the tube bundle through said baffles.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 19, 2020
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Process for the ammonia production
    Patent number: 10647587
    Abstract: Process and plant for the synthesis of ammonia from a hydrocarbon feedstock, comprising: primary reforming with steam and air-fired secondary reforming wherein primary reforming is performed at a temperature and pressure of at least 790° C. and 50 bar, and secondary reforming is carried out substantially in absence of excess air, the so obtained make-up synthesis gas having a H2 to N2 molar ratio in the range 2.5 to 3.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: May 12, 2020
    Assignee: Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • Axial-radial flow catalytic chemical reactor with two layers of catalyst
    Patent number: 10596538
    Abstract: Axial-radial flow reactor comprising a catalytic bed (1) of a hollow cylindrical shape, having a vertical axis (2), a base (5), a radial gas inlet section (3b), an axial gas inlet section (6) and a radial gas outlet section (4b), wherein the catalytic bed (1) comprises: a first cylindrical annular region (10) containing a layer of a first catalyst (A) and a layer of a second catalyst (B), the layer of the first catalyst being above the layer of the second catalyst; a second cylindrical annular region (9) coaxial to the first annular region and containing only the first catalyst (A).
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: March 24, 2020
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • A PLANT FOR THE PRODUCTION OF NITRIC ACID, A RELATED PROCESS AND METHOD OF REVAMPING
    Publication number: 20200071167
    Abstract: A dual-pressure plant for the synthesis of nitric acid comprising: a reactor (4) providing a gaseous effluent (15) containing nitrogen oxides; an absorption tower (6) nitrogen oxides react with water providing raw nitric acid and, said absorption tower operating at a pressure greater than the pressure of the reactor; a compressor (5) elevating the pressure of the reactor effluent (15) to the absorption pressure; said plant also comprising a first bleacher (37) and a second bleacher (7), said first bleacher (37) stripping with air (39) nitrogen oxides from the output stream (27) of the absorption tower (6) providing a partially stripped nitric acid stream (40) and a nitrogen oxides-loaded air stream (41), the former being fed to the second bleacher (7) and the latter being recycled to the delivery-side of said compressor (5).
    Type: Application
    Filed: February 1, 2018
    Publication date: March 5, 2020
    Applicant: Casale SA
    Inventors: Iacopo Cerea, Jean François Granger
  • Process and plant for the production of ammonia make-up gas including production of a hydrogen gas by steam reforming
    Patent number: 10562768
    Abstract: A process and plant for producing a makeup synthesis gas (20) for the synthesis of ammonia, comprising: reforming of a hydrocarbon feedstock (10) in a steam reformer (SMR), purification of said gas product obtaining a hydrogen synthesis gas, addition of a suitable amount of nitrogen (19) to said hydrogen synthesis gas, wherein said purification includes separation of hydrogen in a main separation unit (S1), which produces a hydrogen current (14) and a tail gas (15), and wherein further hydrogen is recovered from the said tail gas (15) in an additional separation unit (S2); some embodiments provides that an amount of gas product (24) is also fed to said additional separation unit; a corresponding method for the revamping of a front-end of an ammonia plant is also disclosed.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: February 18, 2020
    Assignee: Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • SHELL-AND-TUBE APPARATUS WITH BAFFLES
    Publication number: 20200049412
    Abstract: Shell-and-tube apparatus comprising a plurality of baffles (5) which are arranged along the tube bundle, perpendicular to an axis of the tube bundle and passed through by the said tubes, wherein each baffle is an essentially flat body having openings (11) through which the tubes pass, and in the region of said openings (11) the baffle comprises tabs (12) which protrude from the surface of said baffle.
    Type: Application
    Filed: January 31, 2018
    Publication date: February 13, 2020
    Applicant: Casale SA
    Inventor: Enrico Rizzi
  • Process for integrated production of urea and urea-ammonium nitrate
    Patent number: 10550075
    Abstract: Integrated process for the production of urea and urea-ammonium nitrate, comprising: reacting ammonia and carbon dioxide to form a reaction mixture (4) containing urea and unconverted materials, and also comprising the recovery of unconverted materials in a first recovery stage at a first pressure and in a second recovery stage at a second pressure, wherein ammonia-containing offgas (19) released by said second recovery stage are condensed at said second pressure, and said condensed offgas (20) are recycled to said first recovery stage.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: February 4, 2020
    Assignee: Casale SA
    Inventor: Luca Rugnone
  • AXIAL-RADIAL FLOW CATALYTIC CHEMICAL REACTOR WITH TWO LAYERS OF CATALYST
    Publication number: 20200023330
    Abstract: Axial-radial flow reactor comprising a catalytic bed (1) of a hollow cylindrical shape, having a vertical axis (2), a base (5), a radial gas inlet section (3b), an axial gas inlet section (6) and a radial gas outlet section (4b), wherein the catalytic bed (1) comprises: a first cylindrical annular region (10) containing a layer of a first catalyst (A) and a layer of a second catalyst (B), the layer of the first catalyst being above the layer of the second catalyst; a second cylindrical annular region (9) coaxial to the first annular region and containing only the first catalyst (A).
    Type: Application
    Filed: September 21, 2017
    Publication date: January 23, 2020
    Applicant: Casale SA
    Inventor: Enrico RIZZI
  • FLUID BED GRANULATION PROCESS
    Publication number: 20200023402
    Abstract: A fluid bed granulation process of a predetermined substance comprises the steps of: forming, through a fluidification, air flow of predetermined flow rate, a fluid bed of granules of said substance to be granulated fed to it in the form of seeds,—feeding said fluid bed with a continuous flow of a growth substance (or liquid).
    Type: Application
    Filed: September 30, 2019
    Publication date: January 23, 2020
    Applicant: Casale SA
    Inventor: Gianfranco Bedetti
  • PROCESS AND PLANT FOR THE PRODUCTION OF A UREA SOLUTION FOR USE IN SCR PROCESS FOR REDUCTION OF NOX
    Publication number: 20200023343
    Abstract: A process and a plant for the preparation of an acqueous solution of urea suitable for use in a SCR process for nitrogen oxides removal, wherein the urea solution from the recovery section of a urea plant is subject to at least one step of evaporation, separating a vapour stream containing water and ammonia, and obtaining a concentrated and substantially ammonia-free solution, and said concentrated solution is diluted to the concentration of urea suitable for use in the SCR process.
    Type: Application
    Filed: September 30, 2019
    Publication date: January 23, 2020
    Applicant: Casale SA
    Inventor: Federico Zardi
  • AMMONIA-UREA INTEGRATED PROCESS AND PLANT
    Publication number: 20200002273
    Abstract: A process for the production of ammonia and urea in an ammonia-urea integrated plant comprising an ammonia section and a tied-in urea section, wherein a hydrocarbon is reformed to produce ammonia make-up synthesis gas; said make-up gas is purified by shift conversion and removal of carbon dioxide; carbon dioxide is removed from the make-up gas by a first and a second CO2 removal sections;the first section removes CO2 by absorption with a suitable medium, and the second section removes CO2 by washing with a carbamate solution taken from the urea section; the make-up gas is reacted to produce ammonia; the CO2 removed from the make-up gas and at least part of the ammonia are used to produce urea.
    Type: Application
    Filed: February 1, 2018
    Publication date: January 2, 2020
    Applicant: Casale SA
    Inventors: Francesco Nettuno, Luca Rugnone, Raffaele Ostuni
  • Plant and process for ammonia production with cryogenic purification, and related method of revamping
    Patent number: 10514203
    Abstract: Process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen, said process comprising: generation of a synthesis gas (8) containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section (2); a first cryogenic purification, designed to remove nitrogen and raise said molar ratio; conversion of the synthesis gas into ammonia (13) inside a high-pressure synthesis loop (6), with extraction from said loop of a purge stream (14) containing hydrogen and inert gases; wherein at least a portion of said purge stream (14) undergoes a further purification in order to recover at least part of the hydrogen contained therein, obtaining at least one stream (15, 15a, 16, 18) containing recovered hydrogen which is recycled to the process.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: December 24, 2019
    Assignee: Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • Sonication in a urea or melamine synthesis process
    Patent number: 10507451
    Abstract: Process and respective reactor for urea or melamine synthesis, comprising sonication treatment of at least part of a reaction liquid mass or two-phase mixture contained inside said reactor.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: December 17, 2019
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Method for purification of a CO2 stream
    Patent number: 10508079
    Abstract: A process for removing hydrogen and methanol from a CO2 stream which contains hydrogen and methanol as contaminants, wherein hydrogen and methanol are removed by contacting the CO2 stream with a catalyst which oxidizes hydrogen to water and methanol to carbon dioxide, obtaining a purified CO2 stream.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: December 17, 2019
    Assignee: Casale SA
    Inventor: Federico Maffietti
  • A PROCESS AND SYSTEM TO CAPTURE AMMONIA FROM A PURGE GAS OF A UREA PLANT
    Publication number: 20190375649
    Abstract: A process and system for removing ammonia from ammonia-containing purge gas of a urea plant, the process comprising: contacting said ammonia-containing purge gas with carbon dioxide at a low temperature, reaction of ammonia to form crystals of ammonium salts in a multiphase stream, and removal of the solid ammonium salts from the multiphase stream.
    Type: Application
    Filed: February 1, 2018
    Publication date: December 12, 2019
    Applicant: Casale SA
    Inventor: Luca Rugnone
  • Radial flow horizontal catalytic reactor
    Patent number: 10500556
    Abstract: Horizontal adiabatic reactor (1) for heterogeneous catalytic reactions, comprising an outer cylindrical shell (2), an inlet (6) for reagent gases and an outlet (7) for gaseous products, a basket (10, 13) containing a catalytic bed (5a, 5b) positioned horizontally inside said reactor, wherein said reactor is configured in such a way that the gases cross said catalytic bed in a radial or axial-radial manner, said shell (2) has a cover (4) which can be opened and which defines an opening (20), and said basket (10, 13) is extractable horizontally from said opening.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: December 10, 2019
    Assignee: Casale SA
    Inventor: Mirco Tarozzo
  • METHOD FOR REVAMPING A HIGH PRESSURE MELAMINE PLANT
    Publication number: 20190367464
    Abstract: A high pressure melamine plant comprising a synthesis section and a melamine purification section, wherein the synthesis section provides a first melamine-containing stream (6), and said melamine purification section comprises: a quencher (2) receiving said first melamine-containing stream (6) from the synthesis section; a stripper (3) fed with a second melamine-containing stream (7) from said quencher (2), wherein purified melamine (11) is collected and vapours (10) are extracted; a heat exchanger (12), wherein said vapours (10) are condensed providing a condensed stream (14); an absorber (4) fed with said condensed stream (14) providing an aqueous solution (15) comprising ammonia and carbon dioxide, at least a portion (15b) of said aqueous solution being exported from the purification section (200) of the plant.
    Type: Application
    Filed: January 25, 2017
    Publication date: December 5, 2019
    Applicant: CASALE SA
    Inventors: Gabriele DI CARLO, Andrea SCOTTO, Simone GAMBA
  • PROCESS FOR THE AMMONIA PRODUCTION
    Publication number: 20190367379
    Abstract: Process and plant for the synthesis of ammonia from a hydrocarbon feedstock, comprising: primary reforming with steam and air-fired secondary reforming wherein primary reforming is performed at a temperature and pressure of at least 790° C. and 50 bar, and secondary reforming is carried out substantially in absence of excess air, the so obtained make-up synthesis gas having a H2 to N2 molar ratio in the range 2.5 to 3.
    Type: Application
    Filed: August 13, 2019
    Publication date: December 5, 2019
    Applicant: Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • Reactor-condenser for the synthesis of urea
    Patent number: 10493421
    Abstract: A combined reactor and condenser for the synthesis of urea from ammonia and carbon dioxide, including a condenser section coupled to a reaction section, comprising inputs directed to said condenser section for a gaseous stream comprising ammonia and carbon dioxide and for a solution containing ammonium carbamate and liquid ammonia, and wherein the effluent of the condenser section is sent to the reaction section; the reaction section comprises a plurality of compartments and a plurality of mixers, at least one inside each of said compartments.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: December 3, 2019
    Assignee: Casale SA
    Inventor: Luca Rugnone
  • PROCESS FOR THE SYNTHESIS OF AMMONIA
    Publication number: 20190359494
    Abstract: A dual pressure process for the synthesis of ammonia from a make-up gas, wherein the make-up gas is reacted in two steps in series, the second step operating at a greater pressure than the first step, and wherein a portion of the effluent of the first step is recycled back to the first step, said portion containing unreacted make-up gas.
    Type: Application
    Filed: September 26, 2017
    Publication date: November 28, 2019
    Applicant: Casale SA
    Inventor: Sergio Panza