Polymerizing In Tubular Or Loop Reactor Patents (Class 526/64)
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Patent number: 8729199Abstract: The present invention relates to a process for cleaning a catalyst slurry preparation system and/or a catalyst preparation system. More particularly, the invention relates to a cleaning process for a catalyst preparation system and/or for a catalyst slurry preparation system, wherein an aqueous catalyst inactivation agent is used to rinse the systems, or any parts thereof. The catalysts used in the present invention may be chromium, Ziegler-Natta or metallocene catalysts.Type: GrantFiled: December 17, 2010Date of Patent: May 20, 2014Assignee: Total Research & Technology FeluyInventor: Daan Dewachter
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Publication number: 20140135459Abstract: Disclosed is an ethylene-based polymer with a density from about 0.90 to about 0.94 in grams per cubic centimeter, with a molecular weight distribution (Mw/Mn) from about 2 to about 30, a melt index (I2) from about 0.1 to about 50 grams per 10 minutes, and further comprising sulfur from about 5 to about 4000 parts per million. The amount of sulfur is also determined based upon the total weight of the ethylene-based polymer. Also disclosed is process for making an ethylene-based polymer which includes the steps of splitting a process fluid for delivery into a tubular reactor; feeding an upstream process feed stream into a first reaction zone and at least one downstream process feed stream into at least one other reaction zone, where the process fluid has an average velocity of at least 10 meters per second; and initiating a free-radical polymerization reaction.Type: ApplicationFiled: April 8, 2013Publication date: May 15, 2014Applicant: Dow Global Technologies LLCInventor: Dow Global Technologies LLC
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Publication number: 20140121334Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.Type: ApplicationFiled: October 31, 2012Publication date: May 1, 2014Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Publication number: 20140121335Abstract: Processes and systems for the production for pressure management of a polymerization product flowing from a loop polymerization reactor to a separation vessel in a slurry polymerization system are disclosed herein. For example, a process comprises withdrawing the polymerization product from a loop polymerization reactor, and conveying the withdrawn polymerization product to a separation vessel via a first pressure differential and a second pressure differential. The withdrawn polymerization product may flow through the first pressure differential before flowing through the second pressure differential, and the first pressure differential may be less than the second pressure differential.Type: ApplicationFiled: February 27, 2013Publication date: May 1, 2014Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Scott E. Kufeld, Bruce E. Kreischer, John D. Hottovy
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Patent number: 8710162Abstract: Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.Type: GrantFiled: May 3, 2011Date of Patent: April 29, 2014Assignee: Fina Technology, Inc.Inventors: Ronald Tharappel, Renaud Oreins, William Gauthier, David Attoe, Kevin McGovern, Michel Messiaen, David Rauscher, Kai Hortmann, Michel Daumerie
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Patent number: 8703883Abstract: Polymerization reactor systems providing real-time control of the average particle size of catalyst system components are disclosed. Methods for operating such polymerization reactor systems also are described.Type: GrantFiled: February 20, 2012Date of Patent: April 22, 2014Assignee: Chevron Phillips Chemical Company LPInventors: Max P. McDaniel, Joel A. Mutchler
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Patent number: 8703885Abstract: The present invention relates to a method for producing a catalyst slurry blend suitable for polymerizing ethylene in an ethylene polymerization loop reactor for obtaining an at least trimodal polyethylene product, comprising the steps of: transferring a first ethylene polymerization catalyst at a first mass flow rate to a mixing vessel, simultaneously transferring a second ethylene polymerization catalyst at a second mass flow rate to said mixing vessel, thereby in situ providing a catalyst slurry blend, wherein said second ethylene polymerization catalyst is different from the first ethylene polymerization catalyst, adjusting and monitoring said first and second mass flow rates, thereby obtaining said catalyst slurry blend at a concentration suitable for polymerizing ethylene, and feeding said catalyst slurry blend to an ethylene polymerization double loop reactor producing said at least trimodal polyethylene product.Type: GrantFiled: December 17, 2010Date of Patent: April 22, 2014Assignee: Total Research & Technology FeluyInventors: Daan Dewachter, Martine Slawinski
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Patent number: 8703886Abstract: Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes use a catalyst system containing at least two activator-supports. One activator-support is a halided solid oxide, and the other activator-support is a sulfated solid oxide and/or phosphated solid oxide.Type: GrantFiled: February 27, 2013Date of Patent: April 22, 2014Assignee: Chevron Phillips Chemical Company LPInventors: Qing Yang, Max P. McDaniel, Tony R. Crain, Kathy S. Collins
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Publication number: 20140107301Abstract: The present invention provides polymerization processes utilizing an ansa-metallocene catalyst system for the production of olefin polymers. Polymers produced from the polymerization processes have properties that vary based upon the presence or the absence of hydrogen and/or comonomer in the polymerization process.Type: ApplicationFiled: December 18, 2013Publication date: April 17, 2014Applicant: Chevron Phillips Chemical Company LPInventors: Richard M. Buck, Qing Yang, Albert P. Masino, Christopher E. Wittner
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Patent number: 8697819Abstract: The present invention relates to a process for producing steam using heat recovered from a polymerization reaction. In particular, the present invention relates to a process for producing steam using heat recovered from a polymerization reaction for producing polyolefin, comprising the steps of: thermally contacting said polymerization reaction with a cooling fluid such that the cooling fluid removes heat from said reaction, thermally contacting at least part of said cooling fluid with at least one absorption cycle thereby transferring heat from the cooling fluid to said absorption cycle, using said absorption cycle to produce steam from a condensate, wherein the cooling fluid is used as a hot source for heating at least one evaporator and at least one generator comprised in said at least one absorption cycle. The present invention also relates to a process for cooling a polymerization reaction using a process as described herein. Said invention also relates to a polyolefin producing unit.Type: GrantFiled: March 20, 2013Date of Patent: April 15, 2014Assignee: Total Research & Technology FeluyInventors: Pierre Van Grambezen, Mourad Abouahi
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Publication number: 20140094573Abstract: A process for preparing a polymer in the form of an aqueous dispersion or a water-redispersible powder includes free-radically initiated heterophase polymerization of one or more ethylenically unsaturated monomers and optionally subsequent drying of the polymer dispersions obtained, wherein the polymerization is performed in a jet loop reactor.Type: ApplicationFiled: March 9, 2012Publication date: April 3, 2014Applicant: Wacker Chemie AGInventors: Dirk Kutschera, Josef Eisenlauer, Wolf-Dieter Hergeth, Hans-Peter Weitzel, Mathias Wiedemann
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Publication number: 20140094574Abstract: A polyolefin has 1) a density in the range of 0.93 to 0.97 g/cm3, 2) a BOCD (Broad Orthogonal Co-monomer Distribution) index defined by a given equation in the range of 1 to 5, and 3) a molecular weight distribution (weight average molecular weight/number average molecular weight) in the range of 4 to 10. A supported hybrid metallocene catalyst comprises a first metallocene compound represented by a first given formulae, a second metallocene compound represented by one of three given formulae, and a support.Type: ApplicationFiled: December 2, 2013Publication date: April 3, 2014Applicant: LG CHEM, LTD.Inventors: Joon-Hee Cho, Ki-Soo Lee, Yong-Gyu Han, Dae-Sik Hong, Heon-Yong Kwon, Jong-Sang Park, Seon-Kyoung Kim
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Publication number: 20140088272Abstract: The invention relates to a process for preparing polyolefin in a loop reactor. The polymer is prepared by polymerizing olefin monomers in the presence of a catalyst to produce a polyolefin slurry while pumping said slurry through said loop reactor by means of a pump. The present process is characterized in that the catalyst is fed in the loop reactor at a distance to the pump. The invention allows production of the polymer with advantageous properties while leading to fewer blockages of the reactor.Type: ApplicationFiled: December 2, 2013Publication date: March 27, 2014Applicant: TOTAL PETROCHEMICALS RESEARCH FELUYInventors: Eric Damme, Louis Fouarge, Jerome Bette, Alvaro Fernandez, Aurelien Vantomme, Renaud Oreins, Daniel Siraux
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Patent number: 8680201Abstract: The present invention relates to a compounding method for producing impact-modified thermoplastic compositions with a low content of volatile organic compounds (hereinafter VOCs), wherein relatively inexpensive polymer raw materials with a comparatively elevated initial VOC content may be used, resulting in lowered production costs for producing such VOC-reduced polymer compositions.Type: GrantFiled: February 18, 2010Date of Patent: March 25, 2014Assignee: Bayer Materialscience AGInventors: Andreas Seidel, Hans-Jürgen Thiem
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Publication number: 20140073748Abstract: The present invention relates to a method for initiating an ethylene polymerization reaction in an ethylene polymerization loop reactor. More particularly, the invention relates to the timing upon which hydrogen is introduced into the ethylene polymerization loop reactor. The catalysts used in the ethylene polymerization reaction according to present invention are preferably metallocene catalysts.Type: ApplicationFiled: November 14, 2013Publication date: March 13, 2014Applicant: Total Research & Technology FeluyInventor: Daniel Siraux
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Patent number: 8648156Abstract: Polymerization process in a slurry loop reactor having a slurry loop reaction zone with a volume of at least 50 m3 and an internal diameter (D) of 50 cm or greater, a feed inlet for monomers and diluent, a catalyst inlet for polymerisation catalyst, and a discharge conduit for removal of polymer. Monomer, diluent and catalyst are passed into the reaction zone through their respective inlets where they form a slurry of polymer solids having a polymer solids concentration in the reaction zone of greater than 20 wt %. The space-time yield (STY) is greater than 100 kg/h/m3, and the catalyst inlet is an inlet pipe such that no part of the inlet pipe protrudes beyond the wall of the reaction zone and into the reaction zone by more than 1/10th of the diameter of the reaction zone at the point where the inlet pipe joins the reaction zone.Type: GrantFiled: April 12, 2011Date of Patent: February 11, 2014Assignee: Ineos Commercial Services UK LimitedInventors: Daniel Marissal, Stephen Kevin Lee
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Patent number: 8642710Abstract: The invention relates to a process for preparing polyolefin in a loop reactor. The polymer is prepared by polymerizing olefin monomers in the presence of a catalyst to produce a polyolefin slurry while pumping said slurry through said loop reactor by means of a pump. The present process is characterized in that the catalyst is fed in the loop reactor at a distance to the pump. The invention allows production of the polymer with advantageous properties while leading to fewer blockages of the reactor.Type: GrantFiled: February 3, 2011Date of Patent: February 4, 2014Assignee: Total Petrochemicals Research FeluyInventors: Eric Damme, Louis Fouarge, Jerôme Bette, Alvaro Fernandez, Aurélien Vantomme, Renaud Oreins, Daniel Siraux
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Patent number: 8629223Abstract: The present invention relates to a method for initiating an ethylene polymerization reaction in an ethylene polymerization loop reactor. More particularly, the invention relates to the timing upon which hydrogen is introduced into the ethylene polymerization loop reactor. The catalysts used in the ethylene polymerization reaction according to present invention are preferably metallocene catalysts.Type: GrantFiled: December 17, 2010Date of Patent: January 14, 2014Assignee: Total Research & Technology FeluyInventor: Daniel Siraux
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Patent number: 8618227Abstract: The present invention relates to a process for improving the devolatilization of polymer slurry produced in an olefin polymerization reactor. The process is characterized in that it involves an adjustment of the temperature of the interior surface of the flash line for periodically transferring polymer slurry from the polymerization reactor to a downstream processing unit. In particular, in accordance with the present process, the temperature of the interior surface of the flash line is adjusted to a temperature which is equal to or higher than the softening temperature of the polymer passing through said flash line whereby said temperature is higher in a first half of the length of the flash line than in the remaining length of the flash line.Type: GrantFiled: December 4, 2012Date of Patent: December 31, 2013Assignee: Total Research & Technology FeluyInventors: Lieven Van Looveren, Marc Moers, Mathias Wijffels
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Publication number: 20130345374Abstract: A method for the copolymerization of ethylene and a C3+ olefin in a loop reactor and polymers formed therefrom are described herein. The method generally includes introducing an ethylene monomer, a C3+ olefin and a diluent carrier liquid into a loop reactor. A catalyst system can be supplied to said loop reactor. The diluent liquid, ethylene monomer, and C3+ olefin can be circulated through said loop reactor, while copolymerizing said ethylene and C3+ olefin in the presence of said catalyst system to produce a slurry. The slurry can be diverted into a settling leg, and sequentially discharged therefrom and withdrawn from said loop reactor. An ethylene monomer co-feed can be introduced into said loop reactor at spaced locations downstream of the ethylene and diluent. The ethylene co-feed can be introduced in an amount effective to reduce the variation in the ratio of ethylene and C3+ olefin.Type: ApplicationFiled: June 14, 2013Publication date: December 26, 2013Applicant: TOTAL PETROCHEMICALS RESEARCH FELUYInventors: Louis Fouarge, Eric Damme, Olivier Miserque, Daniel Siraux, Philippe Bodart, Andre Lewalle, Marc Van der Auwera, Frans Van den Brande, Giacomo Conti, Hugo Vandaele, Mark Verleysen, Carl Van Camp, Etienne Laurent, Philippe Marechal, Marc Moers, Leopold D'Hooghe, Marjan Sillis, Kai Hortman, Pascal Folie, Renaud Oreins
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Publication number: 20130333832Abstract: Process for preparing ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator and at least one chain transfer agent at pressures in the range of from 110 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor with at least two reaction zones having different concentrations of the chain transfer agent, wherein the concentration of the chain transfer agent in the first reaction zone is less than 70% of the concentration of the chain transfer agent in the reaction zone with the highest concentration of the chain transfer agent, ethylene homopolymers or copolymers obtainable by such a process, the use of the ethylene homopolymers or copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene homopolymers or copolymers.Type: ApplicationFiled: March 1, 2012Publication date: December 19, 2013Applicant: Basell Polyolefine GmbHInventors: Iakovos Vittorias, Barbara Gall, Sebastian Weiand, Andrei Gonioukh, Stephan Schmitz, Klaus Berhalter, Gerd Mannebach, Markus Busch, Thomas Herrmann
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Patent number: 8609791Abstract: The present invention relates to a method for optimizing the sequential feeding of at least two ethylene polymerization catalysts to an ethylene polymerization reactor, comprising: transferring to a mixing vessel a first ethylene polymerization catalyst and a first diluent, decreasing the concentration of said first ethylene polymerization catalyst in said mixing vessel, transferring to said mixing vessel a second ethylene polymerization catalyst and a second diluent, progressively replacing said first ethylene polymerization catalyst by said second ethylene polymerization catalyst and said first diluent by said second diluent, increasing the concentration of said second ethylene polymerization catalyst in said mixing vessel, sequentially transferring said first ethylene polymerization catalyst and said second ethylene polymerization catalyst from said mixing vessel to an ethylene polymerization reactor.Type: GrantFiled: December 17, 2010Date of Patent: December 17, 2013Assignee: Total Research & Technology FeluyInventors: Daan Dewachter, Martine Slawinski
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Patent number: 8609805Abstract: The present invention provides a highly efficient process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol, said process exhibiting an Space Time Yield value of greater than about 0.9.Type: GrantFiled: September 28, 2011Date of Patent: December 17, 2013Assignee: Invista North America S.A R.L.Inventors: Qun Sun, Gary L. Kiser, Robert D. Orlandi
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Patent number: 8597582Abstract: The present embodiments provide a system and method for separation within a polymer production process. Specifically, a flashline heater configured according to present embodiments may provide more time than is required for complete vaporization of liquid hydrocarbons that are not entrained within a polymer fluff produced within a polymerization reactor. Such extra time may allow for liquid hydrocarbons that are entrained within the polymer fluff to be vaporized.Type: GrantFiled: June 30, 2011Date of Patent: December 3, 2013Assignee: Chevron Phillips Chemical Company LPInventors: John D. Hottovy, Scott E. Kufeld
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Patent number: 8598283Abstract: Methods for shutting down and restarting polymerization in a gas phase polymerization reactor are provided. The method can include introducing a polymerization neutralizer to the reactor in an amount sufficient to stop polymerization therein. The method can also include stopping recovery of a polymer product from the reactor and stopping introduction of a catalyst feed and a reactor feed to the reactor. The method can also include adjusting a pressure within the reactor from an operating pressure to an idling pressure. The method can also include adjusting a superficial velocity of a cycle fluid through the reactor from an operating superficial velocity to an idling superficial velocity. The method can also include maintaining the reactor in an idled state for a period of time.Type: GrantFiled: February 17, 2011Date of Patent: December 3, 2013Assignee: Univation Technologies, LLCInventors: Eric J. Markel, Robert O. Hagerty, Richard B. Pannell, Michael E. Sieloff, Jerome Holveck
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Patent number: 8580202Abstract: A process comprising polymerizing in a loop reactor an olefin monomer optionally together with an olefin commoner in the presence of a polymerization catalyst in a diluent to produce a slurry comprising solid particulate olefin polymer and the diluent wherein the Froude number is maintained at or below 20 is disclosed.Type: GrantFiled: June 30, 2010Date of Patent: November 12, 2013Assignee: Ineos Manufacturing Belgium NVInventors: Stephen Kevin Lee, Daniel Marissal, Brent R. Walworth
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Publication number: 20130296506Abstract: In a process for making a copolymer, a first product stream comprising a semi-crystalline polymer and a chain terminating agent is produced in a first reactor system. The first product is provided to a second reactor system wherein a low crystallinity polymer is produced in the presence of the semi-crystalline polymer. At least a portion of the chain terminating agent is removed from the second reactor system by an in-situ process.Type: ApplicationFiled: March 18, 2013Publication date: November 7, 2013Applicant: ExxonMobil Chemical Patents Inc.Inventors: Kevin W. Lawson, Rodney S. Smith
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Publication number: 20130295289Abstract: Process for preparing ethylene copolymers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor by copolymerizing ethylene, a bi- or multifunctional comonomer and optionally further comonomers, wherein the bi- or multifunctional comonomer bears at least two different functional groups, of which at least one is a unsaturated group, which can be incorporated into the growing polymer chain, and at least another functional group can act as chain transfer agent in radical ethylene polymerization, ethylene copolymers obtainable by such a process, the use of the ethylene copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene copolymers.Type: ApplicationFiled: December 19, 2011Publication date: November 7, 2013Applicant: BASELL POLYOLEFINE GmbHInventors: Dieter Littmann, Dieter Lilge, Barbara Gall, Iakovos Vittorias, Gerd Mannebach, Markus Busch, Thomas Herrmann
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Publication number: 20130274424Abstract: Process for monitoring the polymerization of ethylene or ethylene and comonomers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C.Type: ApplicationFiled: December 19, 2011Publication date: October 17, 2013Applicant: BASELL POLYOLEFINE GmbHInventors: Sebastian Weiand, Wolfgang Gsella, Victor Kuhne, Christian-Ulrich Schmidt, Tom Zimmermann
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Patent number: 8557931Abstract: The present invention relates to a slurry process for preparing an ethylene polymer having a melt flow ratio F/P, according to ASTM 1238, of higher than 25, carried out in two or more stages of polymerization at temperatures in the range from 60 to 120° C., in which at least two of the said two or more polymerization stages are carried out under different concentration of a molecular weight regulator, said process being carried out in the presence of a catalyst system comprising the product obtained by contacting (A) a solid catalyst component comprising Ti, Mg, halogen, and having a porosity (PF), measured by the mercury method and due to pores with radius equal to, or lower than, 1 ?m of at least 0.3 cm3/g and a surface area determined by BET method, of lower than 100 m2/g, and (B) of an organoaluminum compound.Type: GrantFiled: February 15, 2010Date of Patent: October 15, 2013Assignee: Basell Polyolefin GmbHInventors: Diego Brita, Gianni Collina
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Patent number: 8552125Abstract: The invention relates to a process for the preparation of a particulate polyethylene product in a loop reactor, wherein the polymerization catalyst applied in the polymerization process comprises a particulate metallocene-alumoxane catalyst immobilized on a porous silica support; and whereby said metallocene-alumoxane catalyst is heterogeneously distributed on said porous silica support.Type: GrantFiled: December 17, 2010Date of Patent: October 8, 2013Assignee: Total Research & Technology FeluyInventor: Martine Slawinski
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Patent number: 8546496Abstract: The present invention relates to a process for preparing a bimodal polyethylene product in a single loop reactor, comprising polymerizing ethylene monomer and optionally one or more olefin co-monomers in the presence of a single heterogeneous polymerization catalyst consisting of a metallocene-alumoxane catalyst immobilized on a porous support wherein said metallocene comprises only one transition metal. Said polymerization catalyst consists of two physically different fractions of support particles onto which said metallocene-alumoxane catalyst is immobilized.Type: GrantFiled: December 17, 2010Date of Patent: October 1, 2013Assignee: Total Research & Technology FeluyInventor: Martine Slawinski
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Publication number: 20130231446Abstract: The present invention discloses a slurry loop reactor comprising at least two loop reactors connected in series and wherein the line connecting the two loops is subject to a dynamic pressure difference.Type: ApplicationFiled: April 24, 2013Publication date: September 5, 2013Applicant: TOTAL RESEARCH & TECHNOLOGY FELUYInventors: Daan Dewachter, Louis Fouarge, Alain Brusselle
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Publication number: 20130225772Abstract: A supported catalyst system comprising a coprecipitated silica-and titania-containing support, comprising alumoxane as acatalyst activating agent, and a metallocene, wherein the supported catalyst system has a Ti content of at least 0.1 wt %.Type: ApplicationFiled: August 16, 2011Publication date: August 29, 2013Applicant: TOTAL RESEARCH & TECHNOLOGY FELUYInventors: Christopher Willocq, Aurélien Vantomme, Martine Slawinski
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Publication number: 20130217841Abstract: The present invention relates to a process for continuously preparing polymer by RAFT solution polymerisation, the process comprising: introducing into a flow reactor a reaction solution comprising one or more ethylenically unsaturated monomers, RAFT agent, non-reactive solvent and free radical initiator; and promoting RAFT polymerisation of the one or more ethylenically unsaturated monomers within the reactor so as to form a polymer solution that flows out of the reactor.Type: ApplicationFiled: August 12, 2011Publication date: August 22, 2013Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATIONInventors: John Chiefari, Christian Hornung, Simon Saubern
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Publication number: 20130217842Abstract: The present invention discloses catalyst compositions employing silicon-bridged metallocene compounds with bulky substituents. Methods for making these silicon-bridged metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided.Type: ApplicationFiled: March 25, 2013Publication date: August 22, 2013Applicant: Chevron Phillips Chemical Company LPInventor: Chevron Phillips Chemical Company LP
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Patent number: 8513367Abstract: Method of reducing fouling in an elastomer polymerization process that includes providing a reactor capable of housing an industrial-scale elastomer polymerization reaction, and applying a mechanical force to the reactor so as to create a vibration in at least one wall of the reactor, in which fouling is reduced in the reactor. In one embodiment the reaction is an industrial scale butyl polymerization reaction and the reactor is a butyl polymerization reactor.Type: GrantFiled: November 11, 2011Date of Patent: August 20, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Timothy D. Shaffer, Pamela J. Wright, Limin Song
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Patent number: 8513365Abstract: The present invention relates to a process for the polymerization of an olefin monomer. In particular, the present invention relates to a process for the polymerization of an olefin monomer and one or more optional comonomers in presence of a polymerization catalyst and hydrogen, said process being characterized by an improved control of the hydrogen concentration in the polymerization reactor. In addition, the present invention provides for an improved hydrogen feeding system to a polymerization reactor. Furthermore, the present invention provides for a polymerization reactor comprising such an improved hydrogen feeding system.Type: GrantFiled: June 18, 2010Date of Patent: August 20, 2013Assignee: Total Petrochemicals Research FeluyInventor: Daan Dewachter
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Publication number: 20130211018Abstract: The invention covers a supported catalyst system prepared according to a process comprising the following step: i). impregnating a silica-containing catalyst support having a specific surface area of from 150 m2/g to 800 m2/g, preferably 280 m2/g to 600 m2/g, with one or more titanium compounds of the general formula selected from RnTi(OR?)m and (RO)nTi(OR?)m, wherein R and R? are the same or different and are selected from hydrocarbyl groups containing from 1 to 12 carbon and halogens, and wherein n is 0 to 4, m is 0 to 4 and m+n equals 4, to form a titanated silica-containing catalyst support having a Ti content of at least 0.1 wt % based on the weight of the Ti-impregnated catalyst support wherein the supported catalyst system further comprises an alumoxane and a metallocene.Type: ApplicationFiled: July 1, 2011Publication date: August 15, 2013Applicant: TOTAL RESEARCH & TECHNOLOGY FELUYInventors: Christopher Willocq, Aurélien Vantomme, Martine Slawinski
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Publication number: 20130202834Abstract: The invention relates to A process for the polymerisation of ethylene to produce a polyethylene resin in at least two slurry loop reactors connected to each other in series, the resin having a bimodal molecular weight distribution, a molecular weight distribution MWD of at least 7.0, an HLMI of from 1 to 100 g/10 min, and a density of from 0.935 to 0.960 g/cm3, wherein in one reactor 30 to 47 wt % based on the total weight of the polyethylene resin of a high molecular weight (HMW) polyethylene fraction is produced having an HL275 of from 0.05 to 1.8 g/10 min (the equivalent of HLMI of from 0.01 to 1.56 g/10 min), a density of from 0.925 to 0.942 g/cm3 and an MWD of at least 5.0, and in the other reactor a low molecular weight (LMW) polyethylene fraction is produced having an HLMI of from 10 to 1500 g/10 min and a density of from 0.960 to 0.975 g/cm3, in the presence of a Ziegler-Natta catalyst system.Type: ApplicationFiled: February 7, 2011Publication date: August 8, 2013Applicant: Total Petrochemicals Research FeluyInventors: Aurélien Vantomme, Daniel Siraux, Alain Van Sinoy, Jean-Léon Gielens
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Publication number: 20130197168Abstract: A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising a chain transfer agent system (CTA system) and ethylene into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting, a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that at least one of the first reactor zone product and the freshly injected feed comprises a CTA system with a transfer activity of Z2; and with the proviso that the ratio of Z1:Z2 is greater than 1.Type: ApplicationFiled: September 21, 2011Publication date: August 1, 2013Inventors: Otto J. Berbee, Cornelis F.J. den Doelder, Cornelis J. Hosman
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Publication number: 20130190462Abstract: The present invention relates to a process for the preparation of polyether carbonate polyols by catalytic copolymerisation of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances with the aid of double metal cyanide (DMC) catalysts and in the presence of metal salts.Type: ApplicationFiled: February 17, 2011Publication date: July 25, 2013Applicant: Bayer Intellectual Property GmbHInventors: Aurel Wolf, Stefan Grasser, Christoph Gürtler, Jörg Hofmann
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Patent number: 8492489Abstract: A method for the copolymerization of ethylene and a C3+ olefin copolymer in a loop reactor system and polymers formed therefrom are described herein.Type: GrantFiled: August 24, 2010Date of Patent: July 23, 2013Assignee: Total Petrochemicals Research FeluyInventors: Louis Fouarge, Eric Damme, Olivier Miserque, Daniel Siraux, Philippe Bodart, André Lewalle, Marc Van der Auwera, Frans Van den Brande, Giacomo Conti, Hugo Vandaele, Mark Verleysen, Carl Van Camp, Etienne Laurent, Philippe Marechal, Marc Moers, Leopold D'Hooghe, Marjan Sillis, Kai Hortman, Pascal Folie, Renaud Oreins
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Publication number: 20130184419Abstract: Ethylene-based interpolymers, e.g., ethylene-acrylic acid copolymers, are made by a process comprising the steps of: A. Injecting a first feed comprising a chain transfer agent system (CTA system) and ethylene into a first autoclave reactor zone to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone, and (2) at least one of transferring or freshly injecting a feed comprising a CTA system into the second reactor zone to produce a second zone reaction product, the CTA system of the second reactor zone having a transfer activity of Z2; and with the proviso that the ratio of Z1:Z2 is greater than 1. The comonomer comprises at least one carboxylic acid group or an anhydride group.Type: ApplicationFiled: September 21, 2011Publication date: July 18, 2013Inventors: Otto J. Berbee, Roger G. Gagnon, Mark Jasek, Laura Nunez, Bryan Gutermuth
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Patent number: 8487053Abstract: Methods for removing polymer skins or build-up from reactor walls in polymerization reactor systems containing a loop slurry reactor are disclosed. Such methods can employ removing some or all of the comonomer from the reactor system in combination with increasing the polymerization temperature of the loop slurry reactor.Type: GrantFiled: November 30, 2011Date of Patent: July 16, 2013Assignee: Chevron Phillips Chemical Company LPInventors: George R. Rajaendran, Max P. McDaniel, Gregory G. Hendrickson, John D. Stewart, John D. Hottovy, Ted H. Cymbaluk, Susannah Lane, Richard A. Hernandez, Elliott W. Johnson, Qing Yang, William L. Valerioti, Eric Schwerdtfeger, Albert P. Masino
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Patent number: 8481657Abstract: A method for increasing the monomer conversion in a redox initiated emulsion polymerization has been discovered. The method comprises adding a composition comprising an effective amount of a substituted phenol to the polymerization medium. In this manner, high monomer conversion is obtained and the product has low gel contents and a low amount or no crosslinking.Type: GrantFiled: January 7, 2010Date of Patent: July 9, 2013Assignee: Styron Europe GmbHInventors: Hans A. Edel, Hagen Bartossek, Doris R. Marx
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Publication number: 20130172497Abstract: Catalyst compositions containing N,N-bis[2-hydroxidebenzyl]amine transition metal compounds are disclosed. Methods for making these transition metal compounds and for using such compounds in catalyst compositions for the polymerization of olefins also are provided.Type: ApplicationFiled: December 28, 2011Publication date: July 4, 2013Applicant: Chevron Phillips Chemical Company LPInventors: Mark L. Hlavinka, Qing Yang, Youlu Yu
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Patent number: 8475720Abstract: The disclosure relates to a device for removing and analyzing a sample from a polymerization reactor including one or more sample conduits for removing a sample from the reactor and transferring the sample to a sample flash tank, whereby the conduits are in communication with the reactor and are provided with at least two sampling valves; a sample flash tank for separating said solid particles and evaporated gas, whereby the sample flash tanks are connected to the conduits and provided with a device for analyzing evaporated gas, and including a sample receiver for purifying the solid particles. The receivers are connected to the sample flash tanks and provided with an apparatus for analyzing the solid particles. The disclosure includes a method for improving a polymerization reaction.Type: GrantFiled: April 24, 2012Date of Patent: July 2, 2013Assignee: Total Petrochemicals Research FeluyInventor: Hugo Vandaele
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Patent number: 8470250Abstract: A polyester production process employing an esterification system that utilizes a horizontally elongated esterification vessel as an esterification reactor and/or a vapor-liquid disengagement vessel.Type: GrantFiled: April 4, 2011Date of Patent: June 25, 2013Assignee: Grupo Petrotemex, S.A. DE C.V.Inventor: Bruce Roger DeBruin
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Patent number: 8466240Abstract: Processes for producing high pressure polyethylene and processes for increasing the crosslinkability of high pressure polyethylene are disclosed. The processes comprise controlling particular reaction parameters that have been found to promote crosslinkability in the resulting high pressure polyethylene. High pressure polyethylenes having improved crosslinkability are also disclosed.Type: GrantFiled: October 4, 2011Date of Patent: June 18, 2013Assignee: ExxonMobil Chemical Patents Inc.Inventors: Scott C. Solis, Danny Van Hoyweghen, Daniel J. Dobson, Arthur G. Voepel, Cindy Dewitte, Paul J. Clymans, Ashley R. Kropf, Joel E. Schmieg