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).
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Patent number: 10968291Abstract: 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: GrantFiled: November 9, 2017Date of Patent: April 6, 2021Assignee: Basell Polyolefine GmbHInventors: Gerhardus Meier, Ulf Schueller, Gabriele Mei, Massimo Covezzi, Pietro Baita, Lorella Marturano
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Patent number: 10792637Abstract: 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: GrantFiled: December 15, 2017Date of Patent: October 6, 2020Assignee: Basell Poliolefine Italia S.r.l.Inventors: Enrico Balestra, Tiziana Caputo, Massimo Covezzi, Maurizio Dorini, Antonio Mazzucco, Gabriele Mei, Ricardo Rinaldi
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Patent number: 10730974Abstract: 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: GrantFiled: August 3, 2016Date of Patent: August 4, 2020Assignee: Basell Poliolefine Italia S.r.l.Inventors: Giampiero Morini, Massimo Covezzi, Tiziano Dall'occo, Dario Liguori, Fabrizio Piemontesi, Gianni Vitale
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Patent number: 10654956Abstract: 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: GrantFiled: April 25, 2018Date of Patent: May 19, 2020Assignee: Equistar Chemicals, LPInventors: Harilaos Mavridis, Roberta Pica, Pietro Baita, Gabriele Mei, Massimo Covezzi
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Patent number: 10611901Abstract: 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: GrantFiled: November 22, 2016Date of Patent: April 7, 2020Assignee: Basell Poliolefine Italia S.r.l.Inventors: Massimo Covezzi, Paola Massari, Claudio Cavalieri, Roberta Marzolla
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Patent number: 10556972Abstract: 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: GrantFiled: November 2, 2017Date of Patent: February 11, 2020Assignee: Basell Poliolefine Italia S.r.l.Inventors: Pietro Baita, Massimo Covezzi, Maria Di Diego, Lorella Marturano, Antonio Mazzucco, Gabriele Mei, Roberta Pica
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Patent number: 10471407Abstract: 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: GrantFiled: December 22, 2017Date of Patent: November 12, 2019Assignee: Basell Polyolefine GmbHInventors: Gabriele Mei, Massimo Covezzi, Gerhardus Meier, Antonio Mazzucco, Pietro Baita, Ulf Schueller, Lorella Marturano, Enrico Balestra
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Publication number: 20190336930Abstract: 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: ApplicationFiled: December 15, 2017Publication date: November 7, 2019Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: ENRICO BALESTRA, TIZIANA CAPUTO, MASSIMO COVEZZI, MAURIZIO DORINI, ANTONIO MAZZUCCO, GABRIELE MEI, RICARDO RINALDI
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Publication number: 20190322775Abstract: 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: ApplicationFiled: November 9, 2017Publication date: October 24, 2019Applicant: Basell Polyolefine GmbHInventors: Gerhardus Meier, Ulf Schueller, Gabriele Mei, Massimo Covezzi, Pietro Baita, Lorella Marturano
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Publication number: 20190276566Abstract: 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: ApplicationFiled: November 2, 2017Publication date: September 12, 2019Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: PIETRO BAITA, MASSIMO COVEZZI, MARIA DI DIEGO, LORELLA MARTURANO, ANTONIO MAZZUCCO, GABRIELE MEI, ROBERTA PICA
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Publication number: 20180362748Abstract: 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: ApplicationFiled: November 22, 2016Publication date: December 20, 2018Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: MASSIMO COVEZZI, PAOLA MASSARI, CLAUDIO CAVALIERI, ROBERTA MARZOLLA
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Patent number: 10155888Abstract: 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: GrantFiled: January 6, 2017Date of Patent: December 18, 2018Assignee: Basell Poliolefine Italia S.r.l.Inventors: Massimo Covezzi, Gabriele Mei, Maria Di Diego, Piero Gessi, Pietro Baita, Roberta Pica
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Publication number: 20180319916Abstract: 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: ApplicationFiled: April 25, 2018Publication date: November 8, 2018Applicant: EQUISTAR CHEMICALS, LPInventors: HARILAOS MAVRIDIS, ROBERTA PICA, PIETRO BAITA, GABRIELE MEI, MASSIMO COVEZZI
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Publication number: 20180215845Abstract: 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: ApplicationFiled: August 3, 2016Publication date: August 2, 2018Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: GIAMPIERO MORINI, MASSIMO COVEZZI, TIZIANO DALL'OCCO, DARIO LIGUORI, FABRIZIO PIEMONTESI, GIANNI VITALE
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Publication number: 20180178180Abstract: 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: ApplicationFiled: December 22, 2017Publication date: June 28, 2018Applicant: Basell Polyolefine GmbHInventors: Gabriele Mei, Massimo Covezzi, Gerhardus Meier, Antonio Mazzucco, Pietro Baita, Ulf Schueller, Lorella Marturano, Enrico Balestra
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Patent number: 9938359Abstract: 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: GrantFiled: December 18, 2013Date of Patent: April 10, 2018Assignee: Basell Poliolefine Italia S.r.l.Inventors: Massimo Covezzi, Gabriele Mei, Pietro Baita, Lorella Marturano
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Patent number: 9738778Abstract: 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: GrantFiled: June 19, 2013Date of Patent: August 22, 2017Assignee: Basell Polyolefine GmbHInventors: Fabiana Fantinel, Bodo Richter, Shahram Mihan, Massimo Covezzi, Claudio Cavalieri, Michele Grazzi
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Publication number: 20170114254Abstract: 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: ApplicationFiled: January 6, 2017Publication date: April 27, 2017Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: MASSIMO COVEZZI, GABRIELE MEI, MARIA DI DIEGO, PIERO GESSI, PIETRO BAITA, ROBERTA PICA
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Patent number: 9574026Abstract: 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: GrantFiled: August 5, 2014Date of Patent: February 21, 2017Assignee: Basell Poliolefine Italia S.r.l.Inventors: Massimo Covezzi, Gabriele Mei, Maria Di Diego, Piero Gessi, Pietro Baita, Roberta Pica
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Publication number: 20160208026Abstract: 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: ApplicationFiled: August 5, 2014Publication date: July 21, 2016Applicant: BASELL POLYOLEFINE ITALIA S.R.L.Inventors: MASSIMO COVEZZI, GABRIELE MEI, MARIA DI DIEGO, PIERO GESSI, PIETRO BAITA, ROBERTA PICA