Patents by Inventor Massimo Covezzi

Massimo Covezzi 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: 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: 20190336930
    Abstract: A fluid is fed into a polymer bed of a fluidized bed gas phase polymerization reactor by introducing the fluid into the polymer bed through a distributor protruding into the fluidized bed zone of the reactor and terminating with a discharge end positioned so that the following equation is fulfilled: d/D>0.002 wherein d is the distance of the distributor's discharge end from the wall of the reactor, and D is the diameter of the reactor in the fluidized bed zone.
    Type: Application
    Filed: December 15, 2017
    Publication date: November 7, 2019
    Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
    Inventors: ENRICO BALESTRA, TIZIANA CAPUTO, MASSIMO COVEZZI, MAURIZIO DORINI, ANTONIO MAZZUCCO, GABRIELE MEI, RICARDO RINALDI
  • 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
  • Publication number: 20180362748
    Abstract: A propylene polymer composition made from or containing: a) from about 40 wt % to about 80 wt % of a propylene 1-hexene copolymer containing from about 5.5 to about 9.0% by weight, based upon the total weight of the propylene 1-hexene copolymer, of 1-hexene derived units and having a Melt Flow Rate (MFR, measured according to ASTM D 1238 at 230° C., with a load of 2.16 kg) from about 3.5 to about 12.0 g/10 min; and b) from about 20 wt % to about 60 wt % of a propylene ethylene copolymer containing from about 1.5 wt % to about 6.5 wt % based upon the total weight of the propylene ethylene copolymer, of ethylene derived units, and having a Melt Flow Rate (MFR, measured according to ASTM D 1238, at 230° C., with a load of 2.16 kg) from about 3.5 to about 12.0 g/10 min; the sum of a) and b) being 100.
    Type: Application
    Filed: November 22, 2016
    Publication date: December 20, 2018
    Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
    Inventors: MASSIMO COVEZZI, PAOLA MASSARI, CLAUDIO CAVALIERI, ROBERTA MARZOLLA
  • 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
  • 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
  • Publication number: 20180215845
    Abstract: A gas-phase process for the homopolymerization or copolymerization of propylene with other olefins, including carrying out the polymerization in the presence of a catalyst system made from or containing: (a) a solid catalyst component made from or containing Mg, Ti, halogen, an electron donor selected from 1.3-diethers and an olefin polymer in a specific amount; (b) an aluminum alkyl compound and (c) an external electron donor (ED) compound, wherein components (b) and (c) being employed in amounts such that the Al/(ED) molar ratio ranges from about 2 to about 200.
    Type: Application
    Filed: August 3, 2016
    Publication date: August 2, 2018
    Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
    Inventors: GIAMPIERO MORINI, MASSIMO COVEZZI, TIZIANO DALL'OCCO, DARIO LIGUORI, FABRIZIO PIEMONTESI, GIANNI VITALE
  • 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: 9738778
    Abstract: A two steps polymerization process for obtaining a polyolefin composition comprising: a) from 25 wt % to 70 wt % of a propylene homopolymer or a propylene-ethylene copolymer containing from 0.1 wt % to 10 wt % of ethylene derived units; b) from 27 wt % to 70 wt % of a copolymer of ethylene and at least one C3-C20 alpha olefins, wherein the ethylene derived units content ranges from 15 wt % to 70 wt %; c) from 3 wt % to 20 wt % of polyethylene homopolymer or an ethylene and at least one C3-C20 alpha olefins copolymer; the sum a)+b)+c) being 100, wherein said process comprises: step a) contacting under polymerization conditions propylene, optionally ethylene and the catalyst system in order to obtain component a), step b) contacting under polymerization conditions ethylene and at least one C3-C20 alpha-olefins and the catalyst system in order to obtain components b) and c); wherein the catalyst system comprises a metallocene compound and an iron complex.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: August 22, 2017
    Assignee: Basell Polyolefine GmbH
    Inventors: Fabiana Fantinel, Bodo Richter, Shahram Mihan, Massimo Covezzi, Claudio Cavalieri, Michele Grazzi
  • Publication number: 20170114254
    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: Application
    Filed: January 6, 2017
    Publication date: April 27, 2017
    Applicant: BASELL POLIOLEFINE ITALIA S.R.L.
    Inventors: MASSIMO COVEZZI, GABRIELE MEI, MARIA DI DIEGO, PIERO GESSI, PIETRO BAITA, ROBERTA PICA
  • Patent number: 9574026
    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: August 5, 2014
    Date of Patent: February 21, 2017
    Assignee: Basell Poliolefine Italia S.r.l.
    Inventors: Massimo Covezzi, Gabriele Mei, Maria Di Diego, Piero Gessi, Pietro Baita, Roberta Pica
  • Publication number: 20160208026
    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: Application
    Filed: August 5, 2014
    Publication date: July 21, 2016
    Applicant: BASELL POLYOLEFINE ITALIA S.R.L.
    Inventors: MASSIMO COVEZZI, GABRIELE MEI, MARIA DI DIEGO, PIERO GESSI, PIETRO BAITA, ROBERTA PICA
  • Publication number: 20150376303
    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: Application
    Filed: December 18, 2013
    Publication date: December 31, 2015
    Applicant: Basell Poliolefine Italia S.r.l.
    Inventors: Massimo Covezzi, Gabriele Mei, Pietro Baita, Lorella Marturano
  • Patent number: 9133291
    Abstract: Process for transferring polyolefin particles from a first gas-phase polymerization reactor to a second gas-phase polymerization reactor in a multistage polymerization of olefins carried out in at least two serially connected gas-phase polymerization reactors, wherein the first gas-phase reactor is a fluidized-bed reactor comprising a gas distribution grid and a settling pipe, which is integrated with its upper opening into the distribution grid and contains a bed of polyolefin particles which moves from top to bottom of the settling pipe, the process comprising the steps of introducing a fluid into the settling pipe in an amount that an upward stream of the fluid is induced in the bed of polyolefin particles above the fluid introduction point; withdrawing polyolefin particles from the lower end of the settling pipe; and transferring the withdrawn polyolefin particles into the second gas-phase polymerization reactor, process for polymerizing olefins comprising such a process for transferring polyolefin p
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: September 15, 2015
    Assignee: Basell Polyolefine GmbH
    Inventors: Massimo Covezzi, Giuseppe Penzo, Gabriele Mei, Giulia Mei, Pietro Baita, Gerhardus Meier, Antonio De Lucia, Ulf Schueller, Gianpiero Ferraro
  • Publication number: 20150166778
    Abstract: A two steps polymerization process for obtaining a polyolefin composition comprising: a) from 25 wt % to 70 wt % of a propylene homopolymer or a propylene-ethylene copolymer containing from 0.1 wt % to 10 wt % of ethylene derived units; b) from 27 wt % to 70 wt % of a copolymer of ethylene and at least one C3-C20 alpha olefins, wherein the ethylene derived units content ranges from 15 wt % to 70 wt %; c) from 3 wt % to 20 wt % of polyethylene homopolymer or an ethylene and at least one C3-C20 alpha olefins copolymer; the sum a)+b)+c) being 100, wherein said process comprises: step a) contacting under polymerization conditions propylene, optionally ethylene and the catalyst system in order to obtain component a), step b) contacting under polymerization conditions ethylene and at least one C3-C20 alpha-olefins and the catalyst system in order to obtain components b) and c); wherein the catalyst system comprises a metallocene compound and an iron complex.
    Type: Application
    Filed: June 19, 2013
    Publication date: June 18, 2015
    Applicant: Bassel Polyoefine GmbH
    Inventors: Fabiana Fantinel, Bodo Richter, Shahram Mihan, Massimo Covezzi, Claudio Cavalieri, Michele Grazzi
  • Publication number: 20140309384
    Abstract: Process for transferring polyolefin particles from a first gas-phase polymerization reactor to a second gas-phase polymerization reactor in a multistage polymerization of olefins carried out in at least two serially connected gas-phase polymerization reactors, wherein the first gas-phase reactor is a fluidized-bed reactor comprising a gas distribution grid and a settling pipe, which is integrated with its upper opening into the distribution grid and contains a bed of polyolefin particles which moves from top to bottom of the settling pipe, the process comprising the steps of introducing a fluid into the settling pipe in an amount that an upward stream of the fluid is induced in the bed of polyolefin particles above the fluid introduction point; withdrawing polyolefin particles from the lower end of the settling pipe; and transferring the withdrawn polyolefin particles into the second gas-phase polymerization reactor, process for polymerizing olefins comprising such a process for transferring polyolefin partic
    Type: Application
    Filed: December 4, 2012
    Publication date: October 16, 2014
    Applicant: Basell Polyolefine GmbH
    Inventors: Massimo Covezzi, Giuseppe Penzo, Gabriele Mei, Giulia Mei, Pietro Baita, Gerhardus Meier, Antonio De Lucia, Ulf Schueller, Gianpiero Ferraro
  • Patent number: 8293855
    Abstract: A method for transitioning from a first to a second catalyst system for the olefin polymerization reaction in one reactor, wherein the first catalyst system is incompatible with the second catalyst system, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the first catalyst system; and b) performing a second olefin polymerization reaction in the presence of the second catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the Mw of the first polyolefin fraction is less than the Mw of the second polyolefin fraction and the initial activity of catalyst component (A) exceeds the initial activity of catalyst component (B).
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: October 23, 2012
    Assignee: Basell Polyolefine GmbH
    Inventors: Gerhardus Meier, Shahram Mihan, Massimo Covezzi
  • Publication number: 20110130527
    Abstract: A method for transitioning from a first to a second catalyst system for the olefin polymerization reaction in one reactor, wherein the first catalyst system is incompatible with the second catalyst system, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the first catalyst system; and b) performing a second olefin polymerization reaction in the presence of the second catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the Mw of the first polyolefin fraction is less than the Mw of the second polyolefin fraction and the initial activity of catalyst component (A) exceeds the initial activity of catalyst component (B).
    Type: Application
    Filed: July 21, 2009
    Publication date: June 2, 2011
    Inventors: Gerhardus Meier, Shahram Mihan, Massimo Covezzi