Patents by Inventor Pietro Baita

Pietro Baita 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).

  • Publication number: 20210332167
    Abstract: A process for preparation of an ethylene polymer in a gas-phase polymerization unit comprising a gas-phase polymerization reactor by homopolymerizing ethylene or copolymerizing ethylene and one or more C4-C12-1-alkenes in a reaction gas made from or containing propane as polymerization diluent in the presence of a pre-activated polymerization catalyst, wherein a purified propane feed stream made from or containing at least 99 mol % propane and from 0.1 to 100 ppm mol propylene is fed to the gas-phase polymerization unit.
    Type: Application
    Filed: December 16, 2019
    Publication date: October 28, 2021
    Applicant: Basell Polyolefine GmbH
    Inventors: Giuseppe Penzo, Gerhardus Meier, Ulf Schueller, Pietro Baita, Giulia Mei, Elke Damm
  • Patent number: 11078307
    Abstract: A gas-phase polymerization reactor for the gas-phase polymerization of olefins including a polymerization zone having a recycle line for (a) withdrawing reaction gas from the reactor, (b) leading the reaction gas through a heat-exchanger for cooling, and (c) feeding the reaction gas back to the reactor, wherein the recycle line has the heat-exchanger, a centrifugal compressor having variable guide vanes, and a butterfly valve, and a related process for preparing an olefin polymer in the gas-phase polymerization reactor.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: August 3, 2021
    Assignee: Basell Polyolefine GmbH
    Inventors: Pietro Baita, Maurizio Dorini, Giulia Mei, Gerhardus Meier, Giuseppe Penzo, Riccardo Rinaldi
  • Publication number: 20210214472
    Abstract: A gas-phase polymerization reactor for the gas-phase polymerization of olefins including a polymerization zone having a recycle line for (a) withdrawing reaction gas from the reactor, (b) leading the reaction gas through a heat-exchanger for cooling, and (c) feeding the reaction gas back to the reactor, wherein the recycle line has the heat-exchanger, a centrifugal compressor having variable guide vanes, and a butterfly valve, and a related process for preparing an olefin polymer in the gas-phase polymerization reactor.
    Type: Application
    Filed: February 4, 2019
    Publication date: July 15, 2021
    Applicant: Basell Polyolefine GmbH
    Inventors: Pietro Baita, Maurizio Dorini, Giulia Mei, Gerhardus Meier, Giuseppe Penzo, Riccardo Rinaldi
  • Patent number: 10968291
    Abstract: A process for preparing an ethylene polymer including the step of homopolymerizing ethylene or copolymerizing ethylene with one or more comonomers in a gas-phase polymerization reactor including a riser unit wherein growing polymer particles flow upwards under fluidization, fast fluidization or transport conditions and a downcomer wherein growing polymer particles flow downward in a densified form, wherein the hold-up of polymer particles in the downcomer is from 55 wt. % to 80 wt. % of the total hold-up of polymer particles in the gas-phase polymerization reactor.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: April 6, 2021
    Assignee: Basell Polyolefine GmbH
    Inventors: Gerhardus Meier, Ulf Schueller, Gabriele Mei, Massimo Covezzi, Pietro Baita, Lorella Marturano
  • Patent number: 10654956
    Abstract: The present disclosure generally relates to ethylene alpha-olefin copolymers and methods of making ethylene alpha-olefin copolymers. The ethylene alpha-olefin copolymers may have a density of about 0.915 g/mL to about 0.918 g/mL, a rheological polydispersity index greater than 0.8, a melt index of about 0.4 dg/10 min to about 2.0 dg/10 min, and/or a CEF T50 of 84° C. or less. The ethylene alpha-olefin copolymers may be made by combining an ethylene monomer and one or more alpha-olefin monomers in the presence of a catalyst, such as a Ziegler-Natta catalyst.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 19, 2020
    Assignee: Equistar Chemicals, LP
    Inventors: Harilaos Mavridis, Roberta Pica, Pietro Baita, Gabriele Mei, Massimo Covezzi
  • Publication number: 20200071429
    Abstract: A solid catalyst component (i) made from or containing a titanium compound, a magnesium compound and an ether, is activated by using two different aluminum alkyl compounds (ii) and (iii) in sequence and under specific molar ratios relative to each other and to the ether of the solid catalyst component (i).
    Type: Application
    Filed: April 27, 2018
    Publication date: March 5, 2020
    Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
    Inventors: PIETRO BAITA, DARIO LIGUORI, HARILAOS MAVRIDIS, GIAMPIERO MORINI, ROBERTA PICA
  • Patent number: 10556972
    Abstract: A gas-phase process for the homopolymerization or copolymerization of olefins carried out in the presence of a catalyst system formed by a contacting, in a liquid hydrocarbon and in the presence of hydrogen, (a) a solid catalyst component comprising Ti, Mg, and Cl, and optionally an internal electron donor compound, (b) an aluminum alkyl compound and optionally (c) an external donor compound.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: February 11, 2020
    Assignee: Basell Poliolefine Italia S.r.l.
    Inventors: Pietro Baita, Massimo Covezzi, Maria Di Diego, Lorella Marturano, Antonio Mazzucco, Gabriele Mei, Roberta Pica
  • Patent number: 10471407
    Abstract: A process for starting a multizone circulating reactor containing no polyolefin particles, comprising the steps of conveying gas through the reactor and the gas recycle line, feeding a particulate material comprising a polymerization catalyst and optionally polyolefin into the reactor, controlling the gas flow in a vertical reactor zone equipped with a throttling valve at the bottom so that the upwards gas velocity in the bottom part of this reaction zone is lower than the terminal free-fall velocity of the particulate material fed into the reactor, and, after the weight of the particulate polyolefin in this reactor zone is higher than the drag force of the upward moving gas, controlling the circulation rate of the polymer particles within the multizone circulating reactor by adjusting the opening of the throttling valve and adjusting the flow rate of a dosing gas.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 12, 2019
    Assignee: Basell Polyolefine GmbH
    Inventors: Gabriele Mei, Massimo Covezzi, Gerhardus Meier, Antonio Mazzucco, Pietro Baita, Ulf Schueller, Lorella Marturano, Enrico Balestra
  • Publication number: 20190322775
    Abstract: A process for preparing an ethylene polymer including the step of homopolymerizing ethylene or copolymerizing ethylene with one or more comonomers in a gas-phase polymerization reactor including a riser unit wherein growing polymer particles flow upwards under fluidization, fast fluidization or transport conditions and a downcomer wherein growing polymer particles flow downward in a densified form, wherein the hold-up of polymer particles in the downcomer is from 55 wt. % to 80 wt. % of the total hold-up of polymer particles in the gas-phase polymerization reactor.
    Type: Application
    Filed: November 9, 2017
    Publication date: October 24, 2019
    Applicant: Basell Polyolefine GmbH
    Inventors: Gerhardus Meier, Ulf Schueller, Gabriele Mei, Massimo Covezzi, Pietro Baita, Lorella Marturano
  • Publication number: 20190276566
    Abstract: A gas-phase process for the homopolymerization or copolymerization of olefins carried out in the presence of a catalyst system formed by a contacting, in a liquid hydrocarbon and in the presence of hydrogen, (a) a solid catalyst component comprising Ti, Mg, and Cl, and optionally an internal electron donor compound, (b) an aluminum alkyl compound and optionally (c) an external donor compound.
    Type: Application
    Filed: November 2, 2017
    Publication date: September 12, 2019
    Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
    Inventors: PIETRO BAITA, MASSIMO COVEZZI, MARIA DI DIEGO, LORELLA MARTURANO, ANTONIO MAZZUCCO, GABRIELE MEI, ROBERTA PICA
  • Patent number: 10308731
    Abstract: A method for feeding an antistatic compound to a polymerization reactor comprising the steps of: a) dispersing, under mixing conditions, a catalyst powder and an antistatic compound in an oil, so as to form a suspension of catalyst powder and antistatic compound in said oil; b) successively adding, under mixing conditions, a molten thickening agent to said suspension from step a), while maintaining said suspension at a temperature such that said thickening agent solidifies on contact with said suspension; c) transferring the product obtained from b) to a polymerization reactor.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: June 4, 2019
    Assignee: Basell Polyolefine GmbH
    Inventors: Pietro Baita, Paolo Ferrari, Ines Mingozzi, Lorella Pedriali, Maria Di Diego, Roberta Pica
  • Patent number: 10155888
    Abstract: The present technology relates to a method of introducing a supported antistatic compound that does not comprise a transition-metal-based catalyst component for use in an olefin polymerization reactor. In some embodiments, the methods disclosed herein avoid the formation of polymer agglomerates in the reactor and minimize potentially negative effects on catalyst yield.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: December 18, 2018
    Assignee: Basell Poliolefine Italia S.r.l.
    Inventors: Massimo Covezzi, Gabriele Mei, Maria Di Diego, Piero Gessi, Pietro Baita, Roberta Pica
  • Patent number: 10131719
    Abstract: Process for preparing a polyolefin polymer comprising the steps of a) forming a particulate polyolefin polymer by polymerizing one or more olefins in the presence of a polymerization catalyst system in a polymerization reactor; b) discharging the formed polyolefin particles from the polymerization reactor; c) degassing the polyolefin particles by a process comprising at least a final step of contacting the polyolefin particles with a nitrogen stream in a degassing vessel; and d) transferring the polyolefin particles from the vessel, in which the contacting of the polyolefin particles with the nitrogen stream is carried out, to a melt mixing device, in which the polyolefin particles are melted, mixed and thereafter pelletized, without passing the particles through a buffering device, wherein the degassing vessel is only partly filled with polyolefin particles and the empty volume within the degassing vessel is sufficient to take up additional polyolefin particles for at least 3 hours if the transfer of pol
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: November 20, 2018
    Assignee: Basell Polyolefine GmbH
    Inventors: Giuseppe Penzo, Giulia Mei, Gabriele Mei, Antonio De Lucia, Pietro Baita
  • Publication number: 20180319916
    Abstract: The present disclosure generally relates to ethylene alpha-olefin copolymers and methods of making ethylene alpha-olefin copolymers. The ethylene alpha-olefin copolymers may have a density of about 0.915 g/mL to about 0.918 g/mL, a rheological polydispersity index greater than 0.8, a melt index of about 0.4 dg/10 min to about 2.0 dg/10 min, and/or a CEF T50 of 84° C. or less. The ethylene alpha-olefin copolymers may be made by combining an ethylene monomer and one or more alpha-olefin monomers in the presence of a catalyst, such as a Ziegler-Natta catalyst.
    Type: Application
    Filed: April 25, 2018
    Publication date: November 8, 2018
    Applicant: EQUISTAR CHEMICALS, LP
    Inventors: HARILAOS MAVRIDIS, ROBERTA PICA, PIETRO BAITA, GABRIELE MEI, MASSIMO COVEZZI
  • Patent number: 10077322
    Abstract: The present disclosure provides a gas-phase polymerization process for preparing polyethylene, wherein halogenated alcohols in combination with a Ti based catalyst component and aluminum alkyls as co-catalyst suppress ethane formation or increase polymerization activity.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: September 18, 2018
    Assignee: Basell Poliolefine Italia S.r.l.
    Inventors: Pietro Baita, Tiziano Dall'Occo, Maria Di Diego, Dario Liguori, Lorella Marturano, Andreas Maus, Gabriele Mei, Gerhardus Meier, Giampiero Morini, Roberta Pica, Ulf Schueller
  • Patent number: 10011666
    Abstract: The present disclosure provides a catalyst system made from or containing: (A) a solid catalyst component made from or containing (i) a titanium compound supported on a magnesium dichloride; (B) an aluminum alkyl compound; and (C) a halogenated organic ester of formula A-COOR, wherein R is a C1-C10 hydrocarbon group and A is a C1-C15 saturated or unsaturated hydrocarbon group in which at least one of the hydrogen atoms is replaced by a chlorine atom. The present disclosure also provides a process for preparing an olefinic polymer, including a polymerization step of polymerizing an olefin in the presence of the catalyst system. The present disclosure also provides an olefinic polymer made therefrom.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: July 3, 2018
    Assignee: Basell Poliolefine Italia S.r.l.
    Inventors: Pietro Baita, Tiziano Dall'Occo, Maria Di Diego, Dario Liguori, Lorella Marturano, Gabriele Mei, Giampiero Morini, Roberta Pica
  • Publication number: 20180178180
    Abstract: A process for starting a multizone circulating reactor containing no polyolefin particles, comprising the steps of conveying gas through the reactor and the gas recycle line, feeding a particulate material comprising a polymerization catalyst and optionally polyolefin into the reactor, controlling the gas flow in a vertical reactor zone equipped with a throttling valve at the bottom so that the upwards gas velocity in the bottom part of this reaction zone is lower than the terminal free-fall velocity of the particulate material fed into the reactor, and, after the weight of the particulate polyolefin in this reactor zone is higher than the drag force of the upward moving gas, controlling the circulation rate of the polymer particles within the multizone circulating reactor by adjusting the opening of the throttling valve and adjusting the flow rate of a dosing gas.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 28, 2018
    Applicant: Basell Polyolefine GmbH
    Inventors: Gabriele Mei, Massimo Covezzi, Gerhardus Meier, Antonio Mazzucco, Pietro Baita, Ulf Schueller, Lorella Marturano, Enrico Balestra
  • Patent number: 9938359
    Abstract: A process for the preparation of ethylene polymers comprising polymerizing ethylene, optionally with one or more ?-olefin comonomers, in the presence of: (i) a solid catalyst component comprising titanium, magnesium, halogen and optionally an internal electron-donor compound, (ii) an aluminum alkyl compound, and (iii) an antistatic compound selected among the hydroxyesters with at least two free hydroxyl groups, wherein the weight ratio of aluminum alkyl compound to solid catalyst component is higher than 0.80 and the weight ratio of antistatic compound to aluminum alkyl compound is higher than 0.10.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: April 10, 2018
    Assignee: Basell Poliolefine Italia S.r.l.
    Inventors: Massimo Covezzi, Gabriele Mei, Pietro Baita, Lorella Marturano
  • Patent number: 9932465
    Abstract: A process for preparing a polyolefin, including polymerizing olefins in the presence of an antistatic agent made from or containing an alkylene oxide derived polymer made from or containing in average from about 10 to about 200 repeating units —(CH2—CHR—O)— with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio of n:m is in the range of from 6:1 to 1:1, wherein (n) is the average number of repeating units —(CH2—CH2—O)— derived from ethylene oxide and (m) is the average number of repeating units —(CH2—CHR?—O)— derived from the other alkylene oxides with R? being an alkyl group having from 1 to 6 carbon atoms, and the end groups of the alkylene oxide derived polymer are —OH groups.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: April 3, 2018
    Assignee: Basell Polyolefine GmbH
    Inventors: Gerd Mannebach, Bernd Lothar Marczinke, Gerhardus Meier, Ulf Schueller, Shahram Mihan, Andreas Maus, Pietro Baita, Maria Di Diego, Lorella Marturano
  • Publication number: 20180072876
    Abstract: A process for preparing a polyolefin, including polymerizing olefins in the presence of an antistatic agent made from or containing an alkylene oxide derived polymer made from or containing in average from about 10 to about 200 repeating units —(CH2—CHR—O)— with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio of n:m is in the range of from 6:1 to 1:1, wherein (n) is the average number of repeating units —(CH2—CH2—O)— derived from ethylene oxide and (m) is the average number of repeating units —(CH2—CHR?—O)— derived from the other alkylene oxides with R? being an alkyl group having from 1 to 6 carbon atoms, and the end groups of the alkylene oxide derived polymer are —OH groups.
    Type: Application
    Filed: March 23, 2016
    Publication date: March 15, 2018
    Applicant: Basell Polyolefine GmbH
    Inventors: Gerd Mannebach, Bernd Lothar Marczinke, Gerhardus Meier, Ulf Schueller, Shahram Mihan, Andreas Maus, Pietro Baita, Maria Di Diego, Lorella Marturano