Recycling Diluent Patents (Class 526/70)
  • Patent number: 10423736
    Abstract: A computer implemented method simulates the behavior of a gas-solid mixture in a fluidized bed having a particulate comprising Geldart group A particles using a Eulerian model comprising, for each time step (a current time step) and for each cell: obtaining an initial value of an agglomerate diameter corresponding to the cell and corresponding to the beginning of the current time step; performing a force-balance procedure for the cell to determine a first agglomerate diameter corresponding to the cell and corresponding to the current time step, wherein performing the force-balance procedure comprises determining a plurality of forces for the cell based at least in part on the initial value of the agglomerate diameter; updating one or more drag relationships for the current time step based at least in part on the first agglomerate diameter; and performing a computational fluid dynamic (CFD) solve procedure to determine, for the current time, the any one or more of: one or more of: a gas velocity {right arrow o
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: September 24, 2019
    Assignee: University of British Columbia
    Inventors: John Grace, Amir Hossein Ahmadi-Motlagh, Martha Salcudean, Christine Hrenya
  • Patent number: 9221932
    Abstract: A method for making a support impregnated Ziegler-Natta-type catalyst precursor including at least two transition metals and a support material wherein the resulting catalyst precursor is free-flowing is provided. Also provided is a process for producing a Ziegler-Natta type procatalyst by halogenating the free flowing catalyst precursor. The Ziegler-Natta type procatalyst and the reaction product of at least one monomer in the presence of the Ziegler-Natta type procatalyst and cocatalyst are also provided.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: December 29, 2015
    Assignee: Union Carbide Chemicals & Plastics Technology LLC
    Inventors: Robert J. Jorgensen, Burkhard E. Wagner, Cynthia A. Hepburn
  • Patent number: 9174183
    Abstract: The invention provides a fluidized bed polymerization reactor, including: a column, in which a liquid distributor and a gas distributor above the liquid distributor are arranged, so that the reaction zone being divided into a first zone and a second zone through the gas distributor; and a circulating unit for circulating the gas material originated from the top zone of the column into the bottom zone thereof in a form of gas-liquid mixture. The gas-liquid mixture is undergone a gas-liquid separation in the bottom zone, the gas phase portion obtained being fed to the gas distributor and then into the second zone while the liquid phase portion obtained being entered into the first zone through the liquid distributor, so that the temperature in the first zone is lower than that in the second zone. Therefore, polymer with a molecular weight distributed in a relatively wide range can be obtained. The invention further provides a method for preparing polymer.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: November 3, 2015
    Assignees: China Petroleum & Chemical Corporation, Zhejiang University, Sinopec Engineering Incorporation
    Inventors: Wenqing Wu, Yongrong Yang, Guanghai Luo, Jingdai Wang, Binbo Jiang, Shufang Wang, Guodong Han
  • Patent number: 9085646
    Abstract: A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with a heterocyclic nitrile compound.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: July 21, 2015
    Assignee: Bridgestone Corporation
    Inventors: Steven Luo, Ryouji Tanaka, Kouichirou Tani
  • Patent number: 9079986
    Abstract: A system and method for producing polyolefin, including a polyolefin reactor system having: a first reactor to produce a first reactor discharge stream having a first polyolefin and a first diluent; and a second reactor to receive at least a portion of the first reactor discharge stream and to produce a second reactor discharge stream having a second polyolefin and a second diluent, wherein the second diluent is different than the first diluent.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: July 14, 2015
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Maruti Bhandarkar, Elizabeth Ann Benham, Rebecca A. Gonzales, Scott E. Kufeld, Joel A Mutchler, Catherine M. Gill, Thanh T. Nguyen, Timothy O. Odi
  • Patent number: 8952126
    Abstract: A method of making a pure block copolymer includes forming a crude block copolymer; heating a solution of the crude block copolymer and alcohol; and cooling the solution to promote precipitation of a purified block copolymer, wherein an amount of impurities remaining in the purified block copolymer is from about 0 to about 5 wt % based on a total weight of the purified block copolymer; a ratio of a polydispersity index of the crude block copolymer to a polydispersity index of the purified block copolymer is from about 1.02 to about 1.25; a ratio of a molecular weight of the crude block copolymer to a molecular weight of the purified block copolymer is from about 0.75 to about 1.0; and a ratio of a number average molecular weight of the crude block copolymer to a number average molecular weight of the purified block copolymer is from about 0.65 to about 1.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: February 10, 2015
    Assignees: Xerox Corporation, National Research Council of Canada
    Inventors: Andrew J. Myles, Karen A. Moffat, Jordan H. Wosnick, Valerie M. Farrugia
  • Patent number: 8883918
    Abstract: The present invention relates to a process for recycling product streams that have been separated from a hydrocarbon-containing feed stream comprising olefin monomer, olefin co-monomer, hydrocarbon diluent and components such as H2, N2, O2, CO, CO2, and formaldehyde. In accordance with the present process a hydrocarbon-containing feed stream is separated into a) a first side stream comprising hydrocarbon diluent and olefin monomer; b) a second side stream which is substantially hydrogen-free and comprises hydrocarbon diluent and olefin monomer, c) a bottom stream comprising substantially olefin-free hydrocarbon diluent, and d) an overhead vapor stream comprising olefin monomer, hydrocarbon diluent and components such as formaldehyde, H2, N2, O2, CO and CO2. The present process further includes recycling said first and said second side streams in a polymerization process for preparing bimodal polyolefin.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: November 11, 2014
    Assignee: Total Research & Technology Feluy
    Inventors: Denis Mignon, David Vandewiele, Bernard Van De Schrick, Camille Vercruysse
  • Patent number: 8835576
    Abstract: Provided are processes and systems for recovering hydrocarbons in a vent stream from a polymerization process. The methods and systems may include the recovery of an olefin monomer from a polymerization vent gas using ethylene refrigeration to condense and recover the olefin monomers from the vent gas. In some embodiments, the methods and systems may also include compression and condensation of polymerization vent gas, recompression of ethylene refrigerant, and use of an expander compressor turbine device for ethylene refrigeration.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: September 16, 2014
    Inventors: Randall L. Force, Donald A. Fischer
  • Patent number: 8722818
    Abstract: Described herein are methods for monitoring and restoring electrical properties of polymerization reactor wall films. The method may comprise using a reactor wall monitor to monitor and determine an electrical property, such as the bed voltage or breakdown voltage, of the wall film. The method may further comprise adding continuity additive to the reactor and/or adjusting the feed rate of continuity additive being added to the reactor in response to the measured electrical property.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: May 13, 2014
    Assignee: Univation Technologies, LLC
    Inventors: Eric J. Markel, William A. Lamberti, Harry W. Deckman
  • Patent number: 8669334
    Abstract: The invention is directed to a process for the gas phase polymerization of one or more olefin monomers in a fluidized bed reactor in a dry mode or in a (super) condensed mode with a gas stream comprising an inert gas characterized in that the inert gas comprises a mixture of inert components: (1) nitrogen; (2) a gas heat capacity increasing agent (3) a sorption promoting agent and (4) a polymer swelling agent. The inert gas may comprise (1) 5-60% by mol nitrogen (2) 10-90% by mol ethane (3) 1-50% by mol % n-butane and (4) 0.1-10% by mol % n-pentane or iso-pentane.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: March 11, 2014
    Assignee: Saudi Basic Industries Corporation
    Inventors: Yahya Banat, Fahad Al-Obaidi, Abdul Kader Malek
  • Patent number: 8629223
    Abstract: 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: Grant
    Filed: December 17, 2010
    Date of Patent: January 14, 2014
    Assignee: Total Research & Technology Feluy
    Inventor: Daniel Siraux
  • Patent number: 8586685
    Abstract: A process for the polymerization of olefins is disclosed. The process may include: feeding a catalyst, a liquid diluent, and an olefin to a polymerization vessel having, from a polymerization vessel bottom to a polymerization vessel top, a vapor introduction zone, a three-phase reaction zone and a vapor disengagement zone; contacting the catalyst and olefin under conditions of temperature and pressure in the presence of the liquid diluent as a continuous phase in the three-phase reaction zone to form a solid phase polyolefin; withdrawing a gas phase composition from an outlet in fluid communication with the vapor disengagement zone; circulating the gas phase composition through a gas circulation loop to an inlet in fluid communication with the vapor distribution zone at a rate sufficient to agitate the solid and liquid phases within the three-phase reaction zone; and withdrawing a reaction mixture comprising polyolefin and diluents from the three-phase reaction zone.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: November 19, 2013
    Assignee: Univation Technologies, LLC
    Inventors: F. David Hussein, Michael E. Muhle, Ping Cai, Mark W. Blood
  • Patent number: 8580388
    Abstract: The instant invention provides a composition suitable for stretch hood, method of producing the same, and articles made therefrom. The article according to the present invention comprises a multi-layer film according to the present invention has a thickness of at least 3 mils comprising at least one inner layer and two exterior layers, wherein the inner layer comprises at least 50 weight percent polyethylene copolymer having a melt index less than 2 grams/10 minutes, a density less than or equal to 0.910 g/cm3, a total heat of fusion less than 120 Joules/gram and a heat of fusion above 115° C. of less than 5 Joules/gram, the total heat of fusion of the inner layer less than the heat of fusion of either of the two exterior layers, and wherein the multi-layer film has an elastic recovery of at least 40% when stretched to 100% elongation.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: November 12, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: Prashant Mandare, Gregory Bunker, Rajen M. Patel, Yi Jin, Selim Bensason, Mehmet Demirors, Theresa J. Hermel-Davidock, Sarah M. Hayne, Jose E. Ruiz
  • Patent number: 8569433
    Abstract: A manufacturing system for producing polyolefin includes a polymerization reactor, a flash chamber, and a purge column. In certain embodiments, the purge column may receive a solids stream directly from the flash chamber. Further, the purge column may function as a feed tank for an extruder within an extrusion/loadout system. According to certain embodiments, the manufacturing system may be configured to consume less than 445 kilowatt-hours of energy per metric ton of polyolefin produced based on consumption of electricity, steam, and fuel gas.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 29, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait, Richard Peacock, James E. Hein, Scott E. Kufeld, Carl W. Fenderson, Anurag Gupta, Dale A. Zellers
  • Publication number: 20130158213
    Abstract: Process for the preparation of a polyolefin polymer by continuously polymerizing one or more olefin monomers in suspension at temperatures of from 40° C. to 120° C. and pressures of from 0.1 to 10 MPa in the presence of a polymerization catalyst in at least one polymerization reactor, comprising a) withdrawing a suspension of solid polyolefin particles in a suspension medium from the polymerization reactor, wherein the suspension has a temperature of from 65° C. to 120° C.; b) feeding the suspension withdrawn from the polymerization reactor to a moderating vessel; c) keeping the suspension in the moderating vessel at a temperature of from 60° C. to 85° C. for a time sufficiently long that the mean residence time of the suspension in the moderating vessel is at least 5 min; d) withdrawing suspension from the moderating vessel; e) cooling the suspension withdrawn from the moderating vessel to a temperature of from 20° C. to 55° C.
    Type: Application
    Filed: August 30, 2011
    Publication date: June 20, 2013
    Applicant: BASELL POLYOLEFINE GmbH
    Inventors: Gerhardus Meier, Reinhard Kuehl, Harald Prang, Michael Aulbach
  • Patent number: 8303899
    Abstract: A manufacturing system for producing polyolefin includes a polymerization reactor, a flash chamber, and a purge column. In certain embodiments, the purge column may receive a solids stream directly from the flash chamber. Further, the purge column may function as a feed tank for an extruder within an extrusion/loadout system. According to certain embodiments, the manufacturing system may be configured to consume less than 445 kilowatt-hours of energy per metric ton of polyolefin produced based on consumption of electricity, steam, and fuel gas.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: November 6, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait, Richard Peacock, James E. Hein, Scott E. Kufeld, Carl W. Fenderson, Anurag Gupta, Dale A. Zellers, Penny A. Zellers, legal representative
  • Patent number: 8217125
    Abstract: A process for producing polyolefins, which includes polymerizing at least one olefin monomer, separating at least a part of the reaction mixture, dividing the separated reaction mixture into a polymer-lean fraction and a polymer-rich fraction, and subjecting at least a part of the polymer-lean fraction to a purification step prior to recycling back to the polymerization of at least one olefin monomer. The obtained polyolefins particularly have a low content of volatile low molecular weight compounds, a low content of low-molecular weight polyolefin waxes and a low content of residues derived from the catalyst employed.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: July 10, 2012
    Assignee: Borealis Technology Oy
    Inventors: Amir Kiumars Karbasi, Esa Korhonen, Michiel Bergstra
  • Patent number: 8198384
    Abstract: A method for preventing or reducing clogging of a fines ejector in a gas-phase olefin polymerization process is disclosed. The process involves injecting a liquid into the motive gas stream entering the fines ejector.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: June 12, 2012
    Assignee: Westlake Longview Corporation
    Inventors: Glenn Edward Moore, Jeremy Bruce Mann
  • Publication number: 20120136127
    Abstract: A process for the polymerization of olefins is disclosed. The process may include: feeding a catalyst, a liquid diluent, and an olefin to a polymerization vessel having, from a polymerization vessel bottom to a polymerization vessel top, a vapor introduction zone, a three-phase reaction zone and a vapor disengagement zone; contacting the catalyst and olefin under conditions of temperature and pressure in the presence of the liquid diluent as a continuous phase in the three-phase reaction zone to form a solid phase polyolefin; withdrawing a gas phase composition from an outlet in fluid communication with the vapor disengagement zone; circulating the gas phase composition through a gas circulation loop to an inlet in fluid communication with the vapor distribution zone at a rate sufficient to agitate the solid and liquid phases within the three-phase reaction zone; and withdrawing a reaction mixture comprising polyolefin and diluents from the three-phase reaction zone.
    Type: Application
    Filed: July 20, 2010
    Publication date: May 31, 2012
    Applicant: Univation Technologies, LLC
    Inventors: F. David Hussein, Michael E. Muhle, Ping Cai, Mark W. Blood
  • Patent number: 8148476
    Abstract: Process for transferring a slurry stream containing polymer through a transfer line from a polymerisation reactor to a downstream vessel by, prior to entry into the downstream vessel, separating the slurry stream into two flows, the first flow being recycled upstream of the flow separation and the second flow being passed into the downstream vessel. The flow separation is located more than halfway along the transfer line between the reactor and the downstream vessel.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: April 3, 2012
    Assignee: Ineos Manufacturing Belgium NV
    Inventors: Brent R. Walworth, Marc J. G. Parisel
  • Patent number: 8148479
    Abstract: A process for producing water-absorbing polymeric particles by a suspension polymerization with recycling of the hydrophobic solvent, the hydrophobic solvent comprising branched saturated aliphatic hydrocarbons.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: April 3, 2012
    Assignee: BASF SE
    Inventor: Rüdiger Funk
  • Patent number: 8129486
    Abstract: A discharge system for removing a solid/gas mixture from a fluidized bed pressure vessel is provided. The discharge system includes a fluidized bed pressure vessel, a settling vessel, a transfer vessel, discharge line, primary discharge valve, and primary exit valve. Also in included is a method to operate the discharge system. The method includes transferring a solid/gas mixture from a fluidized bed pressure vessel to a settling vessel, transferring the solids to a transfer vessel, and then emptying the transfer vessel.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: March 6, 2012
    Assignee: Univation Technologies, LLC
    Inventors: Randall L. Force, Robert G. Aronson, Mark W. Blood, Gerardo Corona, Dung P. Le, W. Scott Hamilton, Thomas A. Maliszewski, William K. Lutz
  • Patent number: 8128877
    Abstract: A manufacturing process for producing polyolefin, having a feed system, a reactor system including at least one polymerization reactor, a diluent/monomer recovery system, a fractionation system, and an extrusion/loadout system having an extruder. The manufacturing process is configured to consume less than 325 kilowatt-hours of electricity per metric ton of polyolefin produced.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: March 6, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait, Richard Peacock, James E. Hein, Scott E. Kufeld, Carl W. Fenderson, Anurag Gupta, Dale A. Zellers, Penny A. Zellers, legal representative
  • Patent number: 8128878
    Abstract: A method for preparing polyolefin from alpha-olefin with high productivity using an internal circulating fluidized bed polymerization reactor is disclosed. The method for gas-phase polymerization of alpha-olefin comprising the steps of: supplying circulation gas including one or more alpha-olefins and inert gas into a polymerization reactor; polymerizing the alpha-olefin to polyolefin in two separated polymerization areas in the polymerization reactor; and discharging produced polyolefin from the polymerization reactor.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: March 6, 2012
    Inventors: Sung Woo Kang, Nam Kyu Kim, Young Jae Jun, Man Jung Kim, Kil Su Kim
  • Patent number: 8114945
    Abstract: Process for controlling the (co)polymerization of olefins in a continuous polymerization reactor wherein the olefin (co)polymerization is performed in an industrial plant reactor in the presence of a polymerization catalyst characterized in that at least one operating parameter of the plant is controlled by means of a measurement of the chain branching level (CBL) of the produced polymer.
    Type: Grant
    Filed: October 14, 2002
    Date of Patent: February 14, 2012
    Assignee: Ineos Europe Limited
    Inventors: David Heslop, Eric Osmont
  • Patent number: 8097686
    Abstract: A process for the multistage polymerization of olefins in a sequence of an upstream slurry reactor and a downstream gas-phase reactor, the transfer of polymer from the upstream reactor to the downstream reactor comprising the following steps: a) heating the slurry of polyolefin particles to evaporate the liquid polymerization medium; b) separating the polyolefin particles from the obtained gaseous phase in at least a separation chamber; c) transferring the polyolefin particles to said downstream reactor by means of a couple of lock hoppers working intermittently in parallel, where one of said lock hoppers is continuously filled with the polymer coming from said separation chamber, while simultaneously the other one is continuously pressurized by means of a gas comprising the reaction mixture coming from said downstream reactor.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: January 17, 2012
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Dorini Maurizio, Giuseppe Penzo, Rinaldi Riccardo
  • Patent number: 8080610
    Abstract: A monomer recycle process for fluid phase in-line blending of polymers is provided.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: December 20, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Gabor Kiss, Alan Anthony Galuska, James Richardson Lattner
  • Patent number: 8058373
    Abstract: A process for polymerization of propylene, optionally ethylene, and further optionally one or more C4-30 ?-olefins and/or one or more conjugated or nonconjugated dienes under continuous, solution polymerization conditions to prepare a high molecular weight polymer or interpolymer, said process comprising conducting the polymerization in the presence of a catalyst composition comprising a hafnium complex of a polyvalent aryloxyether.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: November 15, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: James C. Stevens, Daniel D. VanderLende
  • Patent number: 8058368
    Abstract: A method for preparing polyolefin from alpha-olefin with high productivity using an internal circulating fluidized bed polymerization reactor is disclosed. The method for gas-phase polymerization of alpha-olefin comprising the steps of: supplying circulation gas including one or more alpha-olefins and inert gas into a polymerization reactor; polymerizing the alpha-olefin to polyolefin in two separated polymerization areas in the polymerization reactor; and discharging produced polyolefin from the polymerization reactor.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: November 15, 2011
    Assignee: Daelim Industrial Co., Ltd.
    Inventors: Sung Woo Kang, Nam Kyu Kim, Young Jae Jun, Man Jung Kim, Kil Su Kim
  • Patent number: 8017701
    Abstract: A manufacturing process for producing polyolefin, having a feed system, a reactor system including at least one polymerization reactor, a diluent/monomer recovery system, a fractionation system, and an extrusion/loadout system having an extruder. The manufacturing process is configured to consume less than 325 kilowatt-hours of electricity per metric ton of polyolefin produced.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: September 13, 2011
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Robert R. McElvain, John D. Hottovy, Ralph W. Romig, Donald W. Verser, David H. Burns, John H. Tait, Richard Peacock, James E. Hein, Scott E. Kufeld, Carl W. Fenderson, Anurag Gupta, Dale A. Zellers, Penny A. Zellers, legal representative
  • Patent number: 7999044
    Abstract: A flash chamber sized to receive the effluent discharged from a polyolefin reactor during normal operation of the reactor and during a reactor dump, advantageously eliminating a reactor dump tank or alternate flash tank from the equipment outlay of a polyolefin manufacturing process. The flash chamber is sized to hold at least the polyolefin solids discharged from the reactor. A condenser fluidically coupled to an overhead portion of the flash chamber is sized to condense the flow rate of vaporized hydrocarbon (e.g., diluent, monomer, etc.) discharged overhead from the flash chamber during normal operation and during the reactor dump.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: August 16, 2011
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: John D. Hottovy, John H. Tait, David H. Burns, Donald W. Verser, James E. Hein
  • Patent number: 7977436
    Abstract: A process and apparatus for gas phase polymerization of olefins in a fluidized bed reactor are disclosed. The process and apparatus employ a vertically oriented fines ejector in order to reduce fouling and reactor downtime.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 12, 2011
    Assignee: Westlake Longview Corp.
    Inventors: Matthew Howard Scott, Kenneth Alan Dooley, Bailey James Salmon, Mark Dewayne Lorenz, Paul Keith Scherrer, Robert Lin, David Lynn Meade, Wayne Scott Strasser, Dwayne Ray Leonard
  • Patent number: 7947786
    Abstract: Disclosed herein are various processes, including but not limited to a continuous process for making an elastomer composition having a Mooney Viscosity (ML (1+4) @125° C.) of from 16 to 180, the composition including a first polymer and a second polymer, the process comprising: polymerizing a first monomer system that includes propylene and one or both of ethylene and propylene in a solvent using a first catalyst system in a first polymerization zone to provide a first polymer, having 60 wt % or more units derived from propylene, including isotactically-arranged propylene-derived sequences and further having a heat of fusion less than 45 J/g or a melting point less than 105° C. or both and a Mooney Viscosity (ML (1+4) @125° C.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: May 24, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Periagaram Srinivasan Ravishankar
  • Publication number: 20110040050
    Abstract: Use of amino acids as regulator substances in the free-radical polymerization of monomer mixtures comprising at least 70% by weight of at least one acrylic and/or methacrylic ester and reaction solution comprising one or more solvents and one or more monomers, at least 50% by weight of the solvents being organic solvents, and at least 70% by weight of the monomers being acrylic and/or methacrylic esters, with at least one amino acid is being present.
    Type: Application
    Filed: July 27, 2010
    Publication date: February 17, 2011
    Applicant: tesa SE
    Inventors: Alexander Prenzel, Jennifer Beschmann
  • Patent number: 7858736
    Abstract: This invention relates to a process comprising contacting an polymerization reactor effluent with a fluorinated hydrocarbon and thereafter recovering olefin polymer, where the fluorinated hydrocarbon is present at 5 volume % to 99 volume % based upon the volume of the effluent and the fluorinated hydrocarbon, and where the polymerization is a continuous polymerization of at least 75 mole % of hydrocarbon monomers, based upon the total moles of monomer present in the reactor.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: December 28, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Peijun Jiang, Robert Olds Hagerty, John Richard Shutt, Charles Stanley Speed, Randall B. Laird, Kevin B. Stavens, Larry L. Iaccino
  • Patent number: 7858715
    Abstract: Method of emulsion polymerization wherein a reactor comprising a closed reactor loop is continuously charged with fresh monomers and water phase at substantially the same rate as the rate of an overflow of reactor charge discharged into a secondary line section. The reactor charge is continuously recirculated within the reactor loop. The discharge rate and the circulation rate in the loop are balanced such as to result in a monomer content in the loop of less than 12 wt. %. The secondary line section has a volume of less than twice the volume of the reactor loop.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: December 28, 2010
    Assignee: Crown Brands Limited
    Inventor: David Charles Adams
  • Publication number: 20100317812
    Abstract: Provided herein is a method for operating a slurry polymerization reaction system to reduce, inhibit, and/or prevent fouling in the polymer recovery and separation apparatus, including one or more portions of a high pressure flash tank. The method generally comprises polymerizing a monomer feed in a slurry polymerization reactor in the presence of catalyst and diluent to produce a polymerization effluent; continuously discharging at least a portion of said polymerization effluent from the reactor through a discharge valve; combining a catalyst poison stream with the polymerization effluent downstream of said discharge valve, wherein the catalyst poison stream comprises a catalyst poison that is a gas at standard conditions; and flashing the combination of polymerization effluent and catalyst poison stream in a first flash tank.
    Type: Application
    Filed: June 11, 2009
    Publication date: December 16, 2010
    Inventor: Thomas W. Towles
  • Patent number: 7851567
    Abstract: The present invention relates to a process for the preparation of multimodal ethylene homo- or copolymers in at least two stages, the process comprising preparation of a first ethylene homo- or copolymer fraction in a loop reactor in slurry phase, preparation of a second ethylene homo- or copolymer fraction in a gas phase reactor, by using a catalyst not containing an inorganic oxide support, and operating the gas phase reactor in such conditions that at least part of the gas is recycled, and that at least a part of the recycled gas is condensed and the (partially) condensed gas is re-introduced into the gas phase reactor.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: December 14, 2010
    Assignee: Borealis Technology Oy
    Inventors: Henrik Andtsjoe, Michiel Bergstra, Ralf Karlsson, Klaus Nyfors, Urban Thorngren
  • Patent number: 7799877
    Abstract: Methods of monitoring and controlling polymerization reactions are disclosed. The ratio of concentrations of two reactor components are determined in a gas stream of a reactor to obtain a leading indicator function L. The value of L or a function of L, such as a rescaled value or a reciprocal, is compared to a target value, and at least one reactor parameter is adjusted in response to a deviation between L or the function of L and the target value. Monitoring of the leading indicator permits rapid diagnosis of reactor problems, and rapid adjustments of reactor parameters, compared to laboratory analysis of samples of polymer properties.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 21, 2010
    Assignee: Univation Technologies, LLC
    Inventors: Kenneth G. Schurzky, Robert L. Santana, Fred D. Ehrman, Pradeep P. Shirodkar
  • Patent number: 7718139
    Abstract: A process and apparatus for gas phase polymerization of olefins in a fluidized bed reactor are disclosed. The process and apparatus employ a vertically oriented fines ejector in order to reduce fouling and reactor downtime.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: May 18, 2010
    Assignee: Westlake Longview Corporation
    Inventors: Matthew Howard Scott, Kenneth Alan Dooley, Bailey James Salmon, Mark Dewayne Lorenz, Paul Keith Scherrer, Robert Lin, David Lynn Meade, Wayne Scott Strasser, Dwayne Ray Leonard
  • Publication number: 20100121003
    Abstract: A process for producing water-absorbing polymeric particles by a suspension polymerization with recycling of the hydrophobic solvent, the hydrophobic solvent comprising branched saturated aliphatic hydrocarbons.
    Type: Application
    Filed: January 8, 2008
    Publication date: May 13, 2010
    Applicant: BASF SE
    Inventor: Rüdiger Funk
  • Patent number: 7714083
    Abstract: The present invention provides a method and apparatus for separating unreacted monomer from a polymerization process effluent stream, wherein the effluent stream comprises unreacted monomer and polymer particles. The method comprises passing the effluent stream of a fluidized-bed reactor into at least one container, feeding a high-pressure olefin through an ejector, and vacuuming at least a portion of the effluent stream from the at least one container through the ejector. The apparatus comprises a fluidized-bed reactor having a first conduit connected to a first tank, an ejector having a second conduit connected to the first tank, and a third conduit connected to the fluidized-bed reactor.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: May 11, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Diwaker Singh
  • Patent number: 7696289
    Abstract: The present invention relates to a continuous gas phase process comprising passing a recycle stream through a fluidized bed in a gas phase fluidized bed reactor, wherein the recycle stream comprises a low molecular weight dew point increasing component and a high molecular weight component, polymerizing an alpha-olefin monomer in the presence of a catalyst, and controlling an amount of the low molecular weight dew point increasing component in the recycle stream such that a dew point approach temperature of the recycle stream is less than the dew point approach temperature when operating with the higher molecular weight dew point increasing component alone.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: April 13, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: D. Brett Fischbuch, Robert O. Hagerty, Sandy C. Hinds, Douglas R. Holroyd, Ai Vey Ng, Diwaker Singh
  • Publication number: 20100048838
    Abstract: In an isoolefin-diolefin rubber production process (e.g. a butyl rubber production process), the cold rubber slurry produced in the reaction vessel is transported from the reaction vessel to the flash tank during which time the cold slurry may be expressed to separate at least part of the cold liquid reaction medium from the isoolefin-diolefin rubber. The separated cold liquid reaction medium is transported off stream, for example by a mechanical filter, where it can be recycled back into the reaction vessel and/or where it can be used to cool a feed stream or streams of the reaction components. The isoolefin-diolefin rubber and the residual liquid reaction medium are transported to a flash tank for further processing. The ability to separate and recycle cold liquid reaction medium makes the process more economical.
    Type: Application
    Filed: October 27, 2009
    Publication date: February 25, 2010
    Applicant: LANXESS INC.
    Inventors: John Lovegrove, Hans-Juergen Mick
  • Patent number: 7666957
    Abstract: A process for the polymerisation of ethylene and optionally at least one C3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: February 23, 2010
    Assignee: Borealis Technology Oy
    Inventors: Kalle Kallio, Janne Maaranen, Eija Lappi, Marina Surakka
  • Patent number: 7655192
    Abstract: A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention includes continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: February 2, 2010
    Assignee: Borealis Technology Oy
    Inventors: Jouni Kivelä, Klaus Nyfors
  • Patent number: 7629425
    Abstract: Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein: (A) comprises (i) polymerization under reflux, and at least two of (ii), (iii), (iv), (v), (vi), and (vii), wherein (ii) comprises an addition of at least 5 mol % of N-vinyllactam to the polymerization mixture if at least 70 mol % of the total amount of hydrophobic monomer used have completely reacted, (iii) comprises return of condensate formed in the reflux from below to the polymerization mixture, (iv) comprises introduction of the initiator in the form of a solution in an organic solvent from below into the polymerization mixture, (v) comprises addition of N-vinyllacta
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: December 8, 2009
    Assignee: BASF SE
    Inventors: Rainer Dobrawa, Ralf Widmaier, Klaus Schnell, Karl-Hermann Strube, Jürgen Nieberle, Reinhold Dieing, Bernd de Potzolli, Andreas Gruber, Ulrich Filges, Martin Meister, Josef Neutzner, Wolfgang Bouquet, Eberhard Schupp
  • Patent number: 7629421
    Abstract: A polyolefin production system, comprising a polymerization reactor (such as a polyethylene loop slurry reactor) and a fractionation system that receives reactor effluent processed in a diluent/monomer recovery system for recycle to the reactor and to suppliers. A conduit diverts a portion of a reflux flow comprising monomer, such as ethylene, from within the fractionation system to the polymerization reactor, providing for less venting of monomer, such as ethylene, to the supplier. Accordingly, monomer yield is advantageously increased, as the monomer returned to the reactor displaces monomer feedstock to the reactor. The reflux flow may originate from a condensed overhead lights from a diluent recycle column disposed in the fractionation subsystem. The diluent recycle column may receive a stream comprising diluent and monomer as feed from the diluent/monomer recovery subsystem, and may receive the non-diverted portion of the reflux flow as reflux.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: December 8, 2009
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: John H. Tait, Robert S. Murphy, Michael A. Watts, Anurag Gupta
  • Publication number: 20090221769
    Abstract: The present invention relates to a method for processing high molecular weight oligomer waste products formed during the production of linear alpha-olefins by oligomerization of ethylene in a reactor in the presence of a solvent and a catalyst, characterized in that the high molecular weight oligomers are separated in a separation unit from a product stream of the reactor comprising the solvent, the catalyst, linear alpha-olefins and high molecular weight oligomers having a solidification temperature in the range of about 60-100° C., then diluted with a dilution medium and heated to about 130° C. to about 200° C., the diluted high molecular weight oligomers are then transferred to a disposal device, wherein at least some of the dilution medium may be recovered and recycled for addition to the dilution medium.
    Type: Application
    Filed: June 13, 2006
    Publication date: September 3, 2009
    Inventors: Peter Fritz, Heinz Bölt, Stefan Glanz, Richard Schneider, Talal Ali, Sultan Al-Otaibi, Fuad Mosa
  • Patent number: 7582710
    Abstract: An improved process for the polymerization of olefin monomer selected from (a) ethylene, (b) propylene, (c) mixtures of ethylene and propylene and (d) mixtures of (a), (b) or (c) with one or more alpha-olefins in a fluidized bed gas phase reactor, said process comprising passing a gaseous mixture of said olefin monomers(s) through the fluidized bed under effective polymerization conditions to provide a polymer product containing unreacted monomer(s) and a gaseous effluent stream comprising unreacted monomer(s), removing the polymer product to a degassing vessel, recycling a first portion of the gaseous effluent stream to the fluidized bed and passing a second portion of the gaseous effluent stream to counter currently contact the polymer product in said degassing vessel to produce a polymer product having a reduced amount of unreacted monomer(s), characterized in that the improvements to the process comprise: (i) removing heavy hydrocarbons from the second portion of the effluent stream and returning said hyd
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: September 1, 2009
    Assignee: Ineos Europe Limited
    Inventors: Andrew David Bell, David Andrew Fargie, David Edward Noble, Michael Bernard Power, Iain David Ross