Patents by Inventor Enrico Rizzi

Enrico Rizzi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10960374
    Abstract: Axial reactor for exothermic or endothermic chemical reactions, comprising at least a first catalytic bed and a second catalytic bed operating in series and at least one heat exchanger between the two catalytic beds, wherein the first catalytic bed has a collector bottom having a box-like structure with flat and parallel walls, which are gas-permeable, and a plurality of parallel channels defined between the walls, wherein a first series of said channels collects the gaseous flow exiting the catalytic bed and passing through the first wall, said gaseous flow is directed towards the heat exchanger, and the flow exiting the exchanger is directed towards the second catalytic bed via a second series of said channels of the collector bottom.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: March 30, 2021
    Assignee: CASALE SA
    Inventor: Enrico Rizzi
  • Patent number: 10788273
    Abstract: Shell-and-tube equipment includes baffles supporting the tubes, each baffle having seats for receiving the tubes shaped so as to receive one or more tubes in at least one free play condition and in a locking condition; each baffle is displaceable with respect to the tube bundle between an assembly position and a working position; in the assembly position the tubes can be received by the baffles in the free play condition while in the working position the tubes are locked.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: September 29, 2020
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Publication number: 20200261876
    Abstract: Axial reactor for exothermic or endothermic chemical reactions, comprising at least a first catalytic bed (3) and a second catalytic bed (4) operating in series and at least one heat exchanger (5) between the two catalytic beds, wherein the first catalytic bed has a collector bottom (6) having a box-like structure with flat and parallel walls, which are gas-permeable, and a plurality of parallel channels (15, 16) defined between the walls, wherein a first series of said channels collects the gaseous flow exiting the catalytic bed and passing through the first wall, said gaseous flow is directed towards the heat exchanger, and the flow exiting the exchanger is directed towards the second catalytic bed via a second series of said channels of the collector bottom.
    Type: Application
    Filed: November 6, 2018
    Publication date: August 20, 2020
    Inventor: Enrico Rizzi
  • Publication number: 20200179993
    Abstract: Granulator (1), in particular for urea, comprising an active system for removal of encrustations from at least one wall (4) with a surface (14) exposed to the granulation process, wherein said system operates by imparting a pulsed deformation to said wall.
    Type: Application
    Filed: June 8, 2017
    Publication date: June 11, 2020
    Applicant: Casale SA
    Inventor: Enrico Rizzi
  • Publication number: 20200164329
    Abstract: A catalytic bed for a chemical reactor, said catalytic bed having an annular-cylindrical geometry and comprising at least one collector made with a gas-permeable cylindrical wall, containing at least a first catalyst and a second catalyst, wherein the second catalyst has a finer particle size than the first catalyst, and wherein the first catalyst forms a layer of catalyst adjacent to and in contact with said collector.
    Type: Application
    Filed: May 23, 2018
    Publication date: May 28, 2020
    Inventor: Enrico Rizzi
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 10449504
    Abstract: Vertical reactor (1) for chemical reactions, comprising a tube heat exchanger (6) immersed in a catalytic bed (5), wherein said tube exchanger (6) comprises a plurality of straight tube bundles (6.1, 6.2) with respective tube plates for feeding (9.1, 9.2) and collecting (10.1, 10.2) the heat exchange fluid, and wherein the tube bundles and the respective tube plates are vertically staggered so as to allow access to the shell side.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: October 22, 2019
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Patent number: 10413878
    Abstract: Vertical reactor (1) for chemical reactions, comprising a tube heat exchanger (6) immersed in a catalytic bed (5), wherein said tube exchanger (6) comprises a plurality of straight tube bundles (6.1, 6.2) with respective tube plates for feeding (9.1, 9.2) and collecting (10.1, 10.2) the heat exchange fluid, and wherein the tube bundles and the respective tube plates are vertically staggered so as to allow access to the shell side.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: September 17, 2019
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Patent number: 10406495
    Abstract: Catalytic chemical reactor comprising a perforated wall (6) adjacent to a supporting wall of the reactor or of a catalytic cartridge contained in the reactor, wherein said perforated wall comprises a plurality of panels (7) and comprises first sectors (9) resting on the supporting wall and second sectors (10) spaced from said supporting wall defining a cavity (11), and wherein means are provided for local securing said gas-permeable wall to said supporting wall, said securing means comprising: a plurality of support elements (13) fixed to the supporting wall (4) and passing through respective openings (15) of the first sectors (9) of the gas-permeable wall and a respective plurality of locking elements (14) which can be associated with the said support elements, the panels of the gas-permeable wall being gripped between said supporting wall and said locking elements.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: September 10, 2019
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Patent number: 10386120
    Abstract: Shell and tube heat exchanger (1) comprising a first outer shell (2) and a tube bundle (3), inlet and outlet interfaces communicating with the shell side and with the tube side for a first fluid and for a second fluid respectively, wherein the exchanger comprises a second shell (4) which is inside said first shell (2) and surrounds said tube bundle (3); said second shell (4) comprises at least one releasable longitudinal joint (32) and a plurality of longitudinal sections connected by releasable joints; said second shell (4) delimits the shell side of the exchanger (1) around said tube bundle (3), and further defines a flushing interspace (5) communicating with said shell side, said first fluid flows through said shell side along one or more longitudinal passages, and said first fluid and said second fluid are counter-current along said one or more longitudinal passages.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: August 20, 2019
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Publication number: 20190209990
    Abstract: Catalytic chemical reactor comprising a perforated wall (6) adjacent to a supporting wall of the reactor or of a catalytic cartridge contained in the reactor, wherein said perforated wall comprises a plurality of panels (7) and comprises first sectors (9) resting on the supporting wall and second sectors (10) spaced from said supporting wall defining a cavity (11), and wherein means are provided for local securing said gas-permeable wall to said supporting wall, said securing means comprising: a plurality of support elements (13) fixed to the supporting wall (4) and passing through respective openings (15) of the first sectors (9) of the gas-permeable wall and a respective plurality of locking elements (14) which can be associated with the said support elements, the panels of the gas-permeable wall being gripped between said supporting wall and said locking elements.
    Type: Application
    Filed: April 20, 2017
    Publication date: July 11, 2019
    Applicant: Casale SA
    Inventor: Enrico RIZZI
  • Publication number: 20190076805
    Abstract: Radial or axial-radial flow catalytic chemical reactor comprising a cylindrical shell and at least one catalytic bed and comprising a plurality of perforated tubes, said tubes having an open end communicating with an inlet of a gaseous flow of reagents in the reactor, said tubes being provided with a plurality of holes on their side surface, said tubes being arranged around the catalytic bed so as to form an outer wall which bounds the catalytic bed and which distributes the reagents inside said bed; each of said tubes being formed by means of longitudinal or helical butt welding of a perforated strip.
    Type: Application
    Filed: March 7, 2017
    Publication date: March 14, 2019
    Inventors: Ermanno FILIPPI, Enrico RIZZI, Mirco TAROZZO
  • Publication number: 20190009237
    Abstract: Vertical reactor (1) for chemical reactions, comprising a tube heat exchanger (6) immersed in a catalytic bed (5), wherein said tube exchanger (6) comprises a plurality of straight tube bundles (6.1, 6.2) with respective tube plates for feeding (9.1, 9.2) and collecting (10.1, 10.2) the heat exchange fluid, and wherein the tube bundles and the respective tube plates are vertically staggered so as to allow access to the shell side.
    Type: Application
    Filed: July 7, 2016
    Publication date: January 10, 2019
    Applicant: Casale SA
    Inventor: Enrico Rizzi
  • Publication number: 20190002401
    Abstract: Combined apparatus (1) for the synthesis of urea from ammonia and carbon dioxide, comprising an internal wall (3) which delimits two coaxial zones (4) inside the apparatus, operating respectively as reaction (4) and condensation (5) zones, and optionally also comprising a stripping zone and/or a scrubber integrated in the same apparatus.
    Type: Application
    Filed: January 31, 2017
    Publication date: January 3, 2019
    Applicant: Casale SA
    Inventors: Andrea Scotto, Enrico Rizzi
  • Patent number: 10155211
    Abstract: Reactor (1) for catalytic chemical reactions, comprising: a partially open outer vessel (2) comprising a manhole (6) for accessing to the interior, and at least one internal wall (5) comprising a plurality of panels (5.1, 5.2, . . . 5.n) assembled inside the vessel (2) so as to form said wall (5); the panels are flexible and deformable so that they may be inserted through said manhole (6), and the resulting wall (5) is not self-supporting and rests against a load-bearing wall (7) of the reactor.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: December 18, 2018
    Assignee: Casale SA
    Inventor: Enrico Rizzi
  • Patent number: 10155729
    Abstract: Reactor for the synthesis of melamine from urea, in accordance with the high-pressure non-catalytic process, comprising: a vertical reactor body (1), at least one inlet (2) for the urea melt, a set of heating elements (3), and a central duct (7), said set of heating elements (3) being arranged inside said central duct.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: December 18, 2018
    Assignee: Casale SA
    Inventor: Enrico Rizzi