Patents by Inventor Gerben Meier
Gerben Meier 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: 8059264Abstract: Method for monitoring the velocity of growing polymer particles flowing in a two-phase stream during a polymerization process, said method comprising measuring the degree of attenuation in the propagation of light in said two-phase stream by means of a photometric instrument, said photometric instrument comprising: one or more transmitting optical waveguides connecting one or more light sources to said two-phase stream, one or more receiving optical waveguides connecting said two-phase stream to a light detector.Type: GrantFiled: February 24, 2004Date of Patent: November 15, 2011Assignee: Basell Poliolefine Italia, s.r.l.Inventors: Christian Ulrich Schmidt, Stefan Ziegler, Gabriele Mei, Stefano Bertolini, Gerben Meier
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Patent number: 7687588Abstract: A process for the gas-phase polymerization of ?-olefÊns CH2?CHR, where R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, carried out in a first and a second interconnected polymerization zones, wherein the growing polymer particles flow through the first of said polymerization zones (riser) under fast fluidization conditions, leave said riser and enter the second of said polymerization zones (downcomer) through which they flow downward in a densified form, leave said downcomer and are reintroduced into said riser, in which process: (a) the gas mixture present in the riser is totally or partially prevented from entering the downcomer, and (b) the gaseous composition inside a portion of the downcomer is maintained substantially similar to the gaseous composition reacting in the riser.Type: GrantFiled: May 9, 2006Date of Patent: March 30, 2010Assignee: Basel Poliolefine Italia s.r.l.Inventors: Gabriele Mei, Joachim T. M. Pater, Gerben Meier, Pietro Baita
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Patent number: 7514508Abstract: Process for preparing a broad molecular weight polyethylene by polymerizing ethylene in the presence of a polymerization catalyst, the process comprising the following steps, in any mutual order: a) polymerizing ethylene, optionally together with one or more ?-olefinic comonomers having from 3 to 12 carbon atoms, in a gas-phase reactor in the presence of hydrogen, b) copolymerizing ethylene with one or more ?-olefinic comonomers having from 3 to 12 carbon atoms in another gas-phase reactor in the presence of an amount of hydrogen less than step a), where in at least one of said gas-phase reactors the growing polymer particles flow upward through a first polymerization zone under fast fluidization or transport conditions, leave said first polymerization zone and enter a second polymerization zone through which they flow downward under the action of gravity.Type: GrantFiled: July 19, 2004Date of Patent: April 7, 2009Assignee: Basell Poliolefine Italia s.r.l.Inventors: Gerben Meier, Massimo Covezzi, Pietro Baita, Gabriele Mei
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Publication number: 20090036617Abstract: A process for the gas-phase polymerization of ?-olefÊns CH2?CHR, where R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, carried out in a first and a second interconnected polymerization zones, wherein the growing polymer particles flow through the first of said polymerization zones (riser) under fast fluidization conditions, leave said riser and enter the second of said polymerization zones (downcomer) through which they flow downward in a densified form, leave said downcomer and are reintroduced into said riser, in which process: (a) the gas mixture present in the riser is totally or partially prevented from entering the downcomer, and (b) the gaseous composition inside a portion of the downcomer is maintained substantially similar to the gaseous composition reacting in the riser.Type: ApplicationFiled: May 9, 2006Publication date: February 5, 2009Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: Gabriele Mei, Joachim T.M. Pater, Gerben Meier, Pietro Baita
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Patent number: 7482411Abstract: A continuous process for the olefin polymerization in a fluidized bed reactor, said process comprising continuously passing a gaseous stream comprising one or more ?-olefin monomers through the fluidized bed in the presence of a polymerization catalyst under reactive conditions, withdrawing polymeric product and unreacted fluids from the reactor, cooling part of said unreacted fluids below the dew point to form a two-phase mixture of gas and condensed liquid and reintroducing said two-phase mixture into the reactor, the process being characterized in that said two-phase mixture is reintroduced under the distribution plate of the reactor so that a part of condensed liquid is separated from the gas and is successively fed above the fluidized bed through an external pipe connecting the bottom of the reactor to a point situated above the upper limit of the fluidized bed of polymer particles.Type: GrantFiled: April 1, 2004Date of Patent: January 27, 2009Assignee: Basell Poliolefine Italia s.r.l.Inventors: Guiseppe Penzo, Gabriele Mei, Gerben Meier
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Patent number: 7414098Abstract: Process for the gas-phase catalytic polymerization of olefins carried out in a plurality of interconnected polymerization zones, the process comprising feeding one or more monomers to said polymerization zones in the presence of a catalyst under reaction conditions and collecting the polymer product from said polymerization zones, in which process the polymer particles grow within a first polymerization zone where a fluidized bed is formed, at least a part of said polymer particles leave said first polymerization zone to enter a second polymerization zone through which they flow downward, leave said second polymerization zone and enter a third polymerization zone through which they flow upward under fast fluidization or transport conditions, leave said third polymerization zone and are reintroduced into the first polymerization zone, thus establishing a circulation of polymer between the different polymerization zones.Type: GrantFiled: September 25, 2003Date of Patent: August 19, 2008Assignee: Basell Polioefine Italia S.p.A.Inventors: Massimo Covezzi, Gerben Meier, Gabriele Mei
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Publication number: 20070159628Abstract: Method for monitoring the velocity of growing polymer particles flowing in a two-phase stream during a polymerization process, said method comprising measuring the degree of attenuation in the propagation of light in said two-phase stream by means of a photometric instrument, said photometric instrument comprising: one or more transmitting optical waveguides connecting one or more light sources to said two-phase stream, one or more receiving optical waveguides connecting said two-phase stream to a light detector.Type: ApplicationFiled: February 24, 2004Publication date: July 12, 2007Applicant: BASELL POLIOLEFINE ITALIA S.r.l.Inventors: Christian Schmidt, Ziegler Stefan, Gabriele Mei, Stefano Bertolini, Gerben Meier
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Publication number: 20070093621Abstract: Process for preparing a broad molecular weight polyethylene by polymerizing ethylene in the presence of a polymerization catalyst, the process comprising the following steps, in any mutual order: a) polymerizing ethylene, optionally together with one or more ?-olefinic comonomers having from 3 to 12 carbon atoms, in a gas-phase reactor in the presence of hydrogen, b) copolymerizing ethylene with one or more ?-olefinic comonomers having from 3 to 12 carbon atoms in another gas-phase reactor in the presence of an amount of hydrogen less than step a), where in at least one of said gas-phase reactors the growing polymer particles flow upward through a first polymerization zone under fast fluidization or transport conditions, leave said first polymerization zone and enter a second polymerization zone through which they flow downward under the action of gravity.Type: ApplicationFiled: July 19, 2004Publication date: April 26, 2007Applicant: BASELL POLIOLEFINE ITALIA S.R.L.Inventors: Gerben Meier, Massimo Covezzi, Pietro Baita, Gabriele Mei
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Publication number: 20070004879Abstract: A continuous process for the olefin polymerization in a fluidized bed reactor, said process comprising continuously passing a gaseous stream comprising one or more ?-olefin monomers through the fluidized bed in the presence of a polymerization catalyst under reactive conditions, withdrawing polymeric product and unreacted fluids from the reactor, cooling part of said unreacted fluids below the dew point to form a two-phase mixture of gas and condensed liquid and reintroducing said two-phase mixture into the reactor, the process being characterized in that said twophase mixture is reintroduced under the distribution plate of the reactor so that a part of condensed liquid is separated from the gas and is successively fed above the fluidized bed through an external pipe connecting the bottom of the reactor to a point situated above the upper limit of the fluidized bed of polymer particles.Type: ApplicationFiled: April 1, 2004Publication date: January 4, 2007Applicant: Basell Poliolefine Italia s.r.l.Inventors: Giuseppe Penzo, Gabriele Mei, Gerben Meier
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Publication number: 20060058474Abstract: Process for the gas-phase catalytic polymerization of olefins carried out in a plurality of interconnected polymerization zones, the process comprising feeding one or more monomers to said polymerization zones in the presence of a catalyst under reaction conditions and collecting the polymer product from said polymerization zones, in which process the polymer particles grow within a first polymerization zone where a fluidized bed is formed, at least a part of said polymer particles leave said first polymerization zone to enter a second polymerization zone through which they flow downward, leave said second polymerization zone and enter a third polymerization zone through which they flow upward under fast fluidization or transport conditions, leave said third polymerization zone and are reintroduced into the first polymerization zone, thus establishing a circulation of polymer between the different polymerization zones.Type: ApplicationFiled: September 25, 2003Publication date: March 16, 2006Applicant: BASELL POLIOLEFINE ITALIA S.P.A.Inventors: Massimo Covezzi, Gerben Meier, Gabriele Mei