Patents by Inventor Volker Fraaije

Volker Fraaije 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: 20210070958
    Abstract: A method of depolymerizing plastics using a halloysite catalyst is described herein. The method reduces the energy required for the depolymerization process while achieving improved depolymerization results.
    Type: Application
    Filed: September 9, 2020
    Publication date: March 11, 2021
    Applicant: Basell Poliolefine Italia S.r.l.
    Inventors: Diego Brita, Sheri E. Davis, Volker Fraaije, Simona Guidotti, Dario Liguori, Sandor Nagy, David L. Ramage, Shahram Mihan, Christopher D. Smith, Daniel F. White, Xueyong Yang
  • Publication number: 20210061972
    Abstract: A method of depolymerizing plastics using a fluorinated alumina catalyst is described herein. The method reduces the energy required for the depolymerization process while achieving improved depolymerization results.
    Type: Application
    Filed: August 25, 2020
    Publication date: March 4, 2021
    Applicant: Basell Poliolefine Italia S.r.l.
    Inventors: Sandor Nagy, Christopher D. Smith, Xueyong Yang, Daniel F. White, Sheri E. Davis, Shahram Mihan, Volker Fraaije
  • Patent number: 10358509
    Abstract: The present disclosure relates to a continuous process for the preparation of ethylene homopolymers or ethylene copolymers comprising polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a chromium catalyst in a gas-phase polymerization reactor which is equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger for cooling and feeding the reactor gas back to the reactor, wherein the polymerization is carried out at a temperature from 30° C. to 130° C. and a pressure of from 0.1 to 10 MPa and an aliphatic carboxylic acid ester having from 8 to 24 carbon atoms is added.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: July 23, 2019
    Assignee: Basell Polyolefine GmbH
    Inventors: Volker Fraaije, Michael Lynch, Shahram Mihan, Gerhardus Meier, Ulf Schueller
  • Publication number: 20180079842
    Abstract: The present disclosure relates to a continuous process for the preparation of ethylene homopolymers or ethylene copolymers comprising polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a chromium catalyst in a gas-phase polymerization reactor which is equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger for cooling and feeding the reactor gas back to the reactor, wherein the polymerization is carried out at a temperature from 30° C. to 130° C. and a pressure of from 0.1 to 10 MPa and an aliphatic carboxylic acid ester having from 8 to 24 carbon atoms is added.
    Type: Application
    Filed: March 23, 2016
    Publication date: March 22, 2018
    Applicant: Basell Polyolefine GmbH
    Inventors: Volker Fraaije, Michael Lynch, Shahram Mihan, Gerhardus Meier, Ulf Schueller
  • Patent number: 8999875
    Abstract: The invention refers to a process for preparing a supported catalyst system for the polymerization of olefins comprising at least one active catalyst component on a support, the process comprising A) impregnating a dry porous support component with a mixture comprising at least one precatalyst, at least one cocatalyst, and a first solvent, such that the total volume of the mixture is from 0.8 to 2.0 times the total pore volume of the support component, and B) thereafter, adding a second solvent in an amount of more than 1.5 times the total pore volume of the support component. The invention refers further to a catalyst system made by this process and the use of this catalyst system for polymerization or copolymerization of olefins.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: April 7, 2015
    Assignee: Basell Polyolefine GmbH
    Inventors: Fabiana Fantinel, Shahram Mihan, Rainer Karer, Volker Fraaije
  • Patent number: 8859451
    Abstract: The present invention refers to a process for the preparation of supported catalysts for the polymerization of olefins comprising at least a late transition metal complex, wherein the process comprises two steps. In the first step a catalytically active component comprising at least one late transition metal complex, optionally in the presence of one or more cocatalysts is mixed with a support; and in the second step the obtained mixture is treated at a reduced pressure under a flow of inert gas at a temperature equal to or below 40° C. to obtain a supported catalyst. The method is especially useful for the preparation of dual supported catalysts, useful in the gas-phase polymerization of olefins.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: October 14, 2014
    Assignee: Basell Polyolefine GmbH
    Inventors: Shahram Mihan, Volker Fraaije, Harald Schmitz
  • Patent number: 8680001
    Abstract: The present invention relates to a process for preparing a catalyst solid for olefin polymerization, comprising a finely divided support, an aluminoxane and a metallocene compound, which comprises: a) firstly combining the finely divided support with the aluminoxane and subsequently b) adding the reaction product of a metallocene compound with at least one organometallic compound to the modified support, catalyst solids obtainable by this process, catalyst systems comprising these catalyst solids, their use for the polymerization of olefins and a process for the polymerization of olefins.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: March 25, 2014
    Assignee: Basell Polyolefine GmbH
    Inventors: Heike Gregorius, Volker Fraaije, Manfred Lutringshauser
  • Publication number: 20130072652
    Abstract: The invention refers to a process for preparing a supported catalyst system for the polymerization of olefins comprising at least one active catalyst component on a support, the process comprising A) impregnating a dry porous support component with a mixture comprising at least one precatalyst, at least one cocatalyst, and a first solvent, such that the total volume of the mixture is from 0.8 to 2.0 times the total pore volume of the support component, and B) thereafter, adding a second solvent in an amount of more than 1.5 times the total pore volume of the support component. The invention refers further to a catalyst system made by this process and the use of this catalyst system for polymerization or copolymerization of olefins.
    Type: Application
    Filed: May 26, 2011
    Publication date: March 21, 2013
    Applicant: Basell Polyolefine GmbH
    Inventors: Fabiana Fantinel, Shahram Mihan, Rainer Karer, Volker Fraaije
  • Publication number: 20120283400
    Abstract: The present invention refers to a process for the preparation of supported catalysts for the polymerization of olefins comprising at least a late transition metal complex, wherein the process comprises two steps. In the first step a catalytically active component comprising at least one late transition metal complex, optionally in the presence of one or more cocatalysts is mixed with a support; and in the second step the obtained mixture is treated at a reduced pressure under a flow of inert gas at a temperature equal to or below 40° C. to obtain a supported catalyst. The method is especially useful for the preparation of dual supported catalysts, useful in the gas-phase polymerization of olefins.
    Type: Application
    Filed: December 16, 2010
    Publication date: November 8, 2012
    Applicant: Basell Polyolefine GmbH
    Inventors: Shahram Mihan, Volker Fraaije, Harald Schmitz
  • Patent number: 7569651
    Abstract: A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 and position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: August 4, 2009
    Assignee: Basell Polypropylen GmbH
    Inventors: Jörg Schottek, Markus Oberhoff, Carsten Bingel, David Fischer, Horst Weiβ, Andreas Winter, Volker Fraaije, Ralph-Dieter Maier, Wolfgang Bidell, Nicola Paczkowski, Jürgen Suhm, Roland Kratzer
  • Publication number: 20090030166
    Abstract: The present invention relates to a process for preparing a catalyst solid for olefin polymerization, comprising a finely divided support, an aluminoxane and a metallocene compound, which comprises: a) firstly combining the finely divided support with the aluminoxane and subsequently b) adding the reaction product of a metallocene compound with at least one organometallic compound to the modified support, catalyst solids obtainable by this process, catalyst systems comprising these catalyst solids, their use for the polymerization of olefins and a process for the polymerization of olefins.
    Type: Application
    Filed: September 24, 2008
    Publication date: January 29, 2009
    Applicant: Basell Polyolefine GmbH
    Inventors: Heike Gregorius, Volker Fraaije, Manfred Lutringshauser
  • Patent number: 7446072
    Abstract: The present invention relates to a process for preparing a catalyst solid for olefin polymerization, comprising a finely divided support, an aluminoxane and a metallocene compound, which comprises a) firstly combining the finely divided support with the aluminoxane and subsequently b) adding the reaction product of a metallocene compound with at least one organometallic compound to the modified support, catalyst solids obtainable by this process, catalyst systems comprising these catalyst solids, their use for the polymerization of olefins and a process for the polymerization of olefins.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: November 4, 2008
    Assignee: Basell Polyolefine GmbH
    Inventors: Heike Gregorius, Volker Fraaije, Manfred Lutringshauser
  • Patent number: 7342078
    Abstract: A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 and position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: March 11, 2008
    Assignee: Basell Polyolefine GmbH
    Inventors: Jörg Schottek, Markus Oberhoff, Carsten Bingel, David Fischer, Horst Weiβ, Andreas Winter, Volker Fraaije, Ralph-Dieter Maier, Wolfgang Bidell, Nicola Paczkowski, Jürgen Suhm, Roland Kratzer
  • Patent number: 7285513
    Abstract: The present invention relates to a process for preparing a catalyst for olefin polymerization which is obtainable by bringing A) at least one organic transition metal compound, B) a mixture of at least two different organo metallic compounds and C) at least one cation-forming compound into contact with one another, wherein the organic transition metal compound A) is firstly brought into contact with the mixture of the organo metallic compounds B). In addition, the invention relates to the use of the catalyst for olefin polymerization, to catalysts obtainable by this process and to a process for the polymerization of olefins in which these catalysts are used.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: October 23, 2007
    Assignee: Basell Polyolefine GmbH
    Inventors: Roland Kratzer, Volker Fraaije
  • Patent number: 7122606
    Abstract: A process for polymerizing one or more alpha-olefins of formula CH2?CHT wherein T is a hydrogen atom or a C1–C20 alkyl radical comprising the following steps: a) contacting in a continuous way one or more of said alpha olefins with a metallocene based catalyst system in a loop reactor, wherein: (i) the reaction is carried out in a liquid medium; (ii) the average residence time of the metallocene-based catalyst system is not more than 30 minutes; (iii) the temperature of the loop ranges from 25° to 70° C.; in order to obtain a polymerization degree ranging from 60 to 500 g per gram of catalyst system; b) feeding in continuous the prepolymerized metallocene-based catalyst system obtained in step a) into a polymerization reactor C) polymerizing one or more alpha-olefins, the same or different from the alpha olefins used in step a), in the presence of said prepolymerized metallocene-based catalyst system.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: October 17, 2006
    Assignee: Basell Polyolefine GmbH
    Inventors: Maria Silvia Tonti, Markus Oberhoff, Volker Fraaije, Bernd Bachmann
  • Patent number: 7094724
    Abstract: Catalyst solid for olefin polymerization comprising A) at least one calcined hydrotalcite and B) at least one organic transition metal compound, and also a catalyst system comprising the catalyst solid, the use of the catalyst solid for the polymerization or copolymerization of olefins and a process for preparing polyolefins by polymerization or copolymerization of olefins in the presence of the catalyst solid.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: August 22, 2006
    Assignee: Bassell Polyelefine GmbH
    Inventors: Volker Fraaije, Markus Oberhoff, Nicola (Hüsgen) Paczkowski, Markus Schopf, Wolfgang Bidell, Joachim Wulff-Döring, Shahram Mihan
  • Publication number: 20060160962
    Abstract: A process for polymerizing one or more alpha-olefins of formula CH2?CHT wherein T is a hydrogen atom or a C1-C20 alkyl radical comprising the following steps: a) contacting in a continuous way one or more of said alpha olefins with a metallocene based catalyst system in a loop reactor, wherein: (i) the reaction is carried out in a liquid medium; (ii) the average residence time of the metallocene-based catalyst system is not more than 30 minutes; (iii) the temperature of the loop ranges from 25° to 70° C.; in to obtain a polymerization degree ranging from 60 to 500 g per gram of catalyst system; b) feeding in continuous the prepolymerized metallocene-based catalyst system obtained in step a) into a polymerization reactor C) polymerizing one or more alpha-olefins, the same or different from the alpha olefins used in step a), in the presence of said prepolymerized metallocene-based catalyst system.
    Type: Application
    Filed: June 29, 2004
    Publication date: July 20, 2006
    Applicant: Basell Polyolefine GmbH
    Inventors: Maria Tonti, Markus Oberhoff, Volker Fraaije, Bernd Bachmann
  • Patent number: 7038070
    Abstract: A process for the preparation of indanones of the formula II from indanones of the formula I or of indanones of the formula IIa from indanones of the formula Ia comprises reacting an indanone of the formula I or Ia with a coupling component.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: May 2, 2006
    Assignee: Basell Polyolefine GmbH
    Inventors: Carsten Bingel, Markus Goeres, Volker Fraaije, Andreas Winter
  • Publication number: 20060058180
    Abstract: The present invention relates to a process for preparing a catalyst solid for olefin polymerization, comprising a finely divided support, an aluminoxane and a metallocene compound, which comprises a) firstly combining the finely divided support with the aluminoxane and subsequently b) adding the reaction product of a metallocene compound with at least one organometallic compound to the modified support, catalyst solids obtainable by this process, catalyst systems comprising these catalyst solids, their use for the polymerization of olefins and a process for the polymerization of olefins.
    Type: Application
    Filed: December 16, 2003
    Publication date: March 16, 2006
    Applicant: Basell Polyolefine GmbH
    Inventors: Heike Gregorius, Volker Fraaije, Manfred Lutringshauser
  • Publication number: 20060020096
    Abstract: A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.
    Type: Application
    Filed: May 18, 2005
    Publication date: January 26, 2006
    Inventors: Jorg Schottek, Markus Oberhoff, Carsten Bingel, David Fischer, Horst Weiss, Andreas Winter, Volker Fraaije, Ralph-Dieter Maier, Wolfgang Bidell, Nicola Paczkowski, Juergen Suhm, Roland Kratzer