Removing Only Nonpolymerized Or Nonpolymerizable Material During Polymerization Process Patents (Class 526/71)
  • Patent number: 12060443
    Abstract: The present invention relates to the polymerisation of one or more monomers in a gas phase reactor, and in particular provides a process for from the polymerisation of one or more monomers in a horizontal stirred bed gas phase reactor, wherein the process comprises: a. Polymerising a mixture comprising one or more monomers and hydrogen in the reactor to produce the polymer, b. Withdrawing from the reactor a gaseous stream, c. Passing the gaseous stream to a condenser in which it is partly condensed to produce a liquid phase and a remaining vapour phase, d. Passing the mixture of liquid phase and remaining vapour from the condenser to a separator in which there is maintained a liquid phase and a vapour phase, the volume of the liquid phase in the separator being a percentage, X, which is between 10 and 80% of the total volume of the separator, e.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: August 13, 2024
    Assignee: INEOS USA LLC
    Inventors: William E. Beardsley, Robert Topliss, James H. Lee, William D. Stephens
  • Patent number: 11905223
    Abstract: Methods of forming a fertilizer composition having slow-release nitrogen compounds with a molten process are disclosed. The methods include mixing of a polyethylene wax with urea, formaldehyde, and one or more of an acid catalyst and emulsifier to form a molten methylene urea mixture. The contents of the molten methylene urea mixture react to form slow-release nitrogen compounds. Fertilizer compositions formed of, or including, the slow-release nitrogen compounds are also disclosed.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: February 20, 2024
    Inventors: Harold E. Thompson, Curtis James MacDonald, Stephanie Von Ville Velez, David Patrick Inglish, Kwame Owusu-Adom
  • Patent number: 11634538
    Abstract: The purpose of the present invention is to provide: a polycarbonate resin which has a narrow molecular weight distribution and in which the formation of low molecular weight oligomers is suppressed; and a method for producing the polycarbonate resin. According to the present invention, provided are a polycarbonate resin containing a structural unit represented by general formula (1), wherein the molecular weight distribution value (Mw/Mn) is 6.0 or less, and the content of oligomers having a molecular weight of less than 1,000 is suppressed to 0.50 mass % or less; and a method for producing the polycarbonate. (In general formula (1), R1-26 represent hydrogen, fluorine, chlorine, bromine, iodine, a C1-9 alkyl group, a C6-12 aryl group, a C1-5 alkoxy group, a C2-5 alkenyl group, or a C7-17 aralkyl group).
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: April 25, 2023
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventor: Shun Ishikawa
  • Patent number: 11149096
    Abstract: The present invention relates to a process for removing hydrocarbons comprising the steps of: (A) passing a stream of a solution into a separator wherein a liquid phase comprising polymer and a vapor phase coexist; (B) withdrawing a vapor stream and a concentrated solution stream from the separator; (C) passing at least a part of the vapour stream into a first fractionator; (D) withdrawing a first overhead stream and a first bottom stream from the first fractionator; (E) passing the first bottom stream to a second fractionator; (F) withdrawing a second overhead stream and a second bottom stream from the second fractionator; characterized in that at least a part of the second overhead stream is withdrawn as a purge stream.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: October 19, 2021
    Assignee: BOREALIS AG
    Inventors: Mohammad Al-Haj Ali, Erik Eriksson, Guhan Mathivanan, Jukka Räsänen, Henry Sleijster, Sameer Vijay, Samuli Zitting
  • Patent number: 10934373
    Abstract: Provided are use of organosilane, and polyolefin resin and preparation method thereof. The method of preparing the polyolefin resin comprises: conducting olefin polymerization of olefin monomers in the presence of a catalyst, and adding organosilane to a polymerization system before the olefin polymerization and/or during the olefin polymerization, wherein the organosilane is represented by a general formula of R1mSiXn(OR2)k, wherein R1 is a C2-C20 alkyl, and a terminal of R1 has an ?-olefin double bond, a norbornene group, a cycloalkene group, or a dicyclopentadiene group; X is a halogen element; R2 is a C1-C20 straight chain, a C1-C20 branched chain, or an isomerized alkyl group; m is an integer from 1-3; n is an integer from 1-3; k is an integer from 0-2; and m, n, and k satisfy the following condition: m+n+k=4. The polyolefin resin obtained by the above method has higher melt strength and mechanical strength.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: March 2, 2021
    Assignees: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES, UNIVERSITY OF CHINESE ACADEMY OF SCIENCES
    Inventors: Jinyong Dong, Yawei Qin
  • Patent number: 10807151
    Abstract: Defects can arise in a product of a metal casting process from reactions occurring at a metal-mold interface. A method that reduces the defects uses an organic binder system by introducing a separate third component to a two-part polyurethane-based binder system used in the cold box or no bake process. The third part is added only after the first two parts are mixed with a refractory molding material to provide a shapeable foundry mix. The third part is an alkyl silicate, such as tetraethyl orthosilicate (“TEOS”), an alkyl orthoformate, such as trimethyl orthoformate (TMOF) or triethyl orthoformate (TEOF), or combinations thereof.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: October 20, 2020
    Assignee: ASK Chemicals LLC
    Inventors: Xianping Wang, Mark Stancliffe, Christian Priebe, Joerg Kroker
  • Patent number: 10618990
    Abstract: Provided herein are VLDPE polymer compositions suitable for use in the manufacture of flexible films or sheets. In one embodiment, the copolymer comprises a polyethylene VLDPE resin with Mz/Mw of greater than 2, CDBI50 of greater than 55 and a single melting peak in DSC measurement. The polymer compositions disclosed herein may be suitable for use in the manufacture of films with improved balance of film toughness, processability and sealability in monolayer and multi-layer film structures.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: April 14, 2020
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Shivendra Kumar Goyal, Bronwyn Hilary Gillon, Christopher John Brooke Dobbin, Stephen Salomons
  • Patent number: 10583691
    Abstract: Polymer compositions having improved electromagnetic (EMI) shielding properties under high temperature are disclosed. The polymer compositions comprise a thermoplastic polymer, stainless steel fiber, and optionally one or more of glass fiber, a conductive filler, a second polymer, and other additives. The disclosed compositions maintain heat resistance and other mechanical properties under high temperatures.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: March 10, 2020
    Assignee: SABIC Global Technologies B.V.
    Inventors: Tong Wu, Will Li, David Zou
  • Patent number: 9328236
    Abstract: The present invention relates to a resol resin consisting of at least one aromatic component with a phenolic OH group and at least one aldehyde component, wherein areas embedded in the resol resin matrix consisting of organically-modified polysiloxane, with said polysiloxane containing hydrocarbon groups that are at least partially bonded to said silicon in the form of non-substituted or substituted alkyl, alkenyl, aryl, arylalkyl or alkyl-aryl groups and that are not linked by covalent bonds to reactive groups of said resol resin. The invention additionally relates to molded articles manufactured from said resin, composites from a sheet material impregnated with said resin, which was subsequently hardened, as well as methods for manufacturing said resin, said molded articles, and said composites.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: May 3, 2016
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Monika Bauer, Hans-Juergen Glasel, Daniel Decker
  • Patent number: 9050573
    Abstract: The present invention relates to a method for monitoring the level of an ethylene polymerization catalyst slurry in a mud pot (2), whereby said catalyst slurry is prepared by introducing a solid catalyst and a liquid diluent in said mud pot (2), and whereby through sedimentation an interface (35) is formed between said diluent and the obtained catalyst slurry, characterized in that said interface (35) is monitored with Time Domain Reflectometry.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: June 9, 2015
    Assignee: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Louis Fouarge, Alain Brusselle
  • Patent number: 9039927
    Abstract: Process for the preparation of etherified melamine/formaldehyde condensates, in which first a methylolation of melamine with a formaldehyde component in the molar ratio of from 1:6 to 1:15, preferably at a pH of >7, is carried out. This is followed by an etherification of the resulting hydroxymethylation intermediate in the presence of a C1-C20-alkyl, preferably of a C1-C6-alcohol, particularly preferably of a C1-C4-alcohol, at a pH of <4.5, and subsequently by at least one distillation step in order to remove in particular methanol from the system, the pH of >9.5 being established before, during and/or after the distillation. According to the invention, a plurality of hydroxymethylation, etherification and distillation steps follow in order to achieve an etherified melamine/formaldehyde condensate which is distinguished by a high degree of hydroxymethylation, a high solids content and a low viscosity.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: May 26, 2015
    Assignee: BASF SE
    Inventors: Andreas Eichfelder, Rainer Erhardt, Martin Reif, Eva Ruba, Günter Scherr, Jörg Schneider, Dieter Weilacher
  • Patent number: 9029447
    Abstract: The purpose of the present invention is to propose a composition of slip additive agents for use in thermoplastic resins, preferably polyolefins, and consequently the presence of this composition on at least one of the layers of mono-extruded or coextruded, laminated or non-laminated films. More particularly, the invention comprehends a composition of additives which comprises at least one primary amide of the generic formula R—CO—NH2 and a secondary amide of the bis amide type of the generic formula R?—CO—NH—CH2—CH2—NH—CO—R?. Films comprising this composition stand out by achieving Coefficient of Friction (CoF) values lower than 0.35 and particularly by their ability to maintain good control over these values for use in the automated packaging industry.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: May 12, 2015
    Assignee: Braskem S.A.
    Inventors: Adriana Benetti Martinelli, Fabio Agnelli Mesquita
  • Patent number: 9018346
    Abstract: The present invention provides a method for removing unreacted monomer in polymer using a SCC comprising a housing having a rotation axis; a supply part of at least one polymer formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move polymer supplied through the polymer supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving polymer from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting polymer moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: April 28, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Eun-Jung Joo, Dong-Kwon Lee, Dae-Young Shin, Jong-Ku Lee, Chang-Hoe Heo
  • 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: 8920735
    Abstract: The present invention provides a SCC (Spinning Cone Column) equipped with a foam removal unit comprising: a housing having a rotation axis; a supply part of at least one reactant formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move supplied reactants through the reactant supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving reactant from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting reactants moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone, wherein a foam removal unit is installed on one side of the housing.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: December 30, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Eun-Jung Joo, Dong-Kwon Lee, Dae-Young Shin, Jong-Ku Lee
  • Publication number: 20140107302
    Abstract: The present invention relates to a SCC with improved mobility of material to be removed due to a wider distance between the upper stages than a distance between the lower stages.
    Type: Application
    Filed: May 25, 2012
    Publication date: April 17, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Eun-Jung Joo, Dae-Young Shin, Jong-Ku Lee
  • Publication number: 20140094575
    Abstract: The present relates to a process for optimizing the recovery of unreacted monomers from a polymerization process, wherein said process comprises the steps of recovering a fluid stream generated by the separation of the polyolefin product from the polymerization fluid comprising unreacted monomers and optionally comonomers; contacting said fluid stream in an absorption zone with a scrub liquid comprising at least one C4-10 hydrocarbons, thereby absorbing at least a portion of the unreacted monomers in said scrub liquid; and withdrawing from said absorption zone (i) a vapor overhead comprising light gas and (ii) an absorber bottoms scrub liquid comprising said C4-10 hydrocarbons and said unreacted monomer; thereby recovering said unreacted monomer in said absorber bottoms scrub liquid comprising said C4-10 hydrocarbons.
    Type: Application
    Filed: December 5, 2013
    Publication date: April 3, 2014
    Applicant: TOTAL PETROCHEMICALS RESEARCH FELUY
    Inventors: Bernard Van Der Schrick, Eric Damme
  • Publication number: 20140088273
    Abstract: The present invention provides a SCC (Spinning Cone Column) equipped with a foam removal unit comprising: a housing having a rotation axis; a supply part of at least one reactant formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move supplied reactants through the reactant supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving reactant from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting reactants moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone, wherein a foam removal unit is installed on one side of the housing.
    Type: Application
    Filed: May 25, 2012
    Publication date: March 27, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Eun-Jung Joo, Dong-Kwon Lee, Dae-Young Shin, Jong-Ku Lee
  • Publication number: 20140066580
    Abstract: The present invention provides a method for removing unreacted monomer in polymer using a SCC comprising a housing having a rotation axis; a supply part of at least one polymer formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move polymer supplied through the polymer supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving polymer from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting polymer moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone.
    Type: Application
    Filed: May 25, 2012
    Publication date: March 6, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Eun-Jung Joo, Dong-Kwon Lee, Dae-Young Shin, Jong-Ku Lee, Chang-Hoe Heo
  • Patent number: 8541542
    Abstract: The present invention relates to a process for reducing residuals content in a vinyl aromatic polymer, said residuals comprising essentially unpolymerized vinyl aromatic monomer, wherein the vinyl aromatic polymer in the molten state is brought in contact with a solid in powder capable to catalyze the alkylation of said residual vinyl aromatic monomer on the vinyl aromatic polymer. Advantage of the present invention is a sharp reduction of the unpolymerized vinyl aromatic monomer in the vinyl aromatic polymer without generating a new residual and without inducing a colored vinyl aromatic polymer. The present invention also relates to said vinyl aromatic polymer having a low residuals content.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: September 24, 2013
    Assignee: Total Research & Technology Feluy
    Inventors: Thomas-Maurice Roussel, Bruno Vuillemin, Francois Fajula
  • Patent number: 8524859
    Abstract: In the production of isobutylene-based elastomers the product obtained from the polymerization process is often in the form of a stream. Described herein are an apparatus and a process for removal of hydrocarbon liquids from the elastomer. The process comprises the steps of obtaining a stream comprising hydrocarbon liquids, either solvents or diluents, and an isobutylene-based elastomer; passing the stream through a kneader to volatize the hydrocarbon liquids from the elastomer.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: September 3, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yu Feng Wang, Richard C-M Yeh
  • Patent number: 8445606
    Abstract: The invention relates to high pressure tubular reactor olefin polymerization plants having improved specific energy consumption. The plants may be newly constructed or made by de-bottlenecking an existing plant. The tube of the tubular reactor may have improved arrangements for cooling to increase conversion and optimized polymer-recycle gas separation arrangements using a jet pump for recycling unreacted monomer while permitting haze to be maintained. The improved cooling arrangements include a reduced pressure cooling zone forming the tail end of the tube and/or a shortened heating zone for the front feed and allowing more monomer to be fed as a side feed.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: May 21, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Henri A. Lammens, Tom Van Nuland, Ivo T. Goossens, Roger L. Claessens, Geert Vaes, Paul Jan Clymans
  • Patent number: 8349975
    Abstract: Method for transitioning from a first process for producing a first polymer to a second process for producing a second polymer. The first and second processes each include contacting a principal olefin and a comonomer with a catalyst under gas phase polymerization conditions to form the first or second polymer. The first and second processes utilize the same olefin but differ in at least one of the comonomer used and the reaction temperature at which the polymer is produced. The respective first or second polymer is then contacted with a purge gas to remove unreacted monomers. The method includes changing the flow rate of purge gas from a first rate to a second rate defined relative to a flow rate and temperature used for an earlier polymer produced using the same comonomer as the second process.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: January 8, 2013
    Assignee: Ineos Europe Limited
    Inventor: Jean-Louis Chamayou
  • Patent number: 8313709
    Abstract: A method for removing contaminants from a process stream that includes the use of reticulated material to filter the process stream in a vessel located upstream of a process unit. The reticulated material can be used with other conventional filter media within the vessel.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: November 20, 2012
    Assignee: Crystaphase International, Inc.
    Inventors: John N. Glover, William D. Duke, Peter G. Ham
  • Patent number: 8304515
    Abstract: A process for the purification of a tetraol PFPE derivative [tetraol (T)] of formula (I): HO—CH2—CH(OH)—CH2—O—CH2—CF2—O—Rf—CF2—CH2O—CH2—CH(OH)—CH2OH, wherein Rf represents a fluoropolyoxyalkene chain (chain Rf), from a mixture (M) of hydroxyl (per)fluoropolyether derivatives, said mixture comprising said tetraol (T) and at least one hydroxyl (per)fluoropolyether [PFPE (OH)] comprising a chain Rf terminated with at least one end group of formula: —CF2CH2OH; —CF2CH2O—CH(OH)—CH2—O—CH2—CH(OH)—CH2OH; said process comprising: step 1: reacting the mixture (M) with ketones and/or aldehydes so as to selectively protect couples of hydroxyl groups on vicinal carbon atoms by forming corresponding cyclic ketal/acetal derivatives, so as to yield a protected mixture (P); step 2: reacting residual hydroxyl groups of the mixture (P) with suitable functionalizing agents enabling substantial volatility modification, so as to obtain a functionalized protected mixture (Pf); step 3: fractional distillation of the mixture (Pf) so a
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: November 6, 2012
    Assignee: Solvay Solexis S.p.A.
    Inventors: Claudio Tonelli, Graziano Giuseppe Vezzulli, Rosaldo Picozzi, Piero Gavezotti
  • Patent number: 8119749
    Abstract: The present invention relates to a method of obtaining a (meth)acrylate-based polymer from a reaction solution containing the (meth)acrylate-based polymer, the method including (a) adding an acid to the reaction solution containing the (meth)acrylate-based polymer which is obtained by polymerizing a monomer composed mainly of a (meth)acrylate in a water-insoluble organic solvent in the presence of a metal compound, (b) washing the reaction solution to which the acid has been added by admixing water at 90° C. or more, (c) separating the mixed solution of the reaction solution and water generated by the washing in (b) into an organic solvent solution layer and an aqueous solution layer, and (d) isolating each of the organic solvent solution layer and the aqueous solution layer in order to obtain the (meth)acrylate-based polymer from the isolated organic solvent solution layer.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: February 21, 2012
    Assignee: Kuraray Co., Ltd.
    Inventors: Kenichi Hamada, Susumu Matsunaga, Kazunori Watanabe, Masaji Kato, Jun Nagai, Tatsufumi Watanabe, Tatsuo Morotomi, Hiroshi Oshima
  • 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: 8013081
    Abstract: A polymer particle (10) useful for opacifying includes a polymer core (12) and a polymer sheath (16) surrounding the polymer core (12). The polymer core (12) is produced by polymerizing the polymer sheath (16) around the polymer core (12) in an emulsion. After at least a portion of the polymer core (12) is formed, a non-homopolymerizing monomer is added to the emulsion.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: September 6, 2011
    Assignee: Valspar Sourcing, Inc.
    Inventors: Martin Peter Joseph Heuts, Archie W. Garner
  • Publication number: 20110207899
    Abstract: The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability.
    Type: Application
    Filed: September 17, 2009
    Publication date: August 25, 2011
    Applicant: NOVOMER, INC.
    Inventors: Scott D. Allen, Jeffrey R. Conuel, David E. Decker, Anna E. Cherian
  • Patent number: 7999045
    Abstract: A process for preparing an aqueous polymer dispersion using flush water.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: August 16, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Lambertus Manders, Ilshat Gubaydullin, Wolfgang Gaschler
  • Publication number: 20110152477
    Abstract: The present invention relates to methods useful for the production of polymer powder, and in particular to a method for transitioning from a first process for production of a first polymer to a second process for the production of a second polymer during a polymerisation campaign in a polymerisation apparatus, said polymerisation apparatus comprising a reaction vessel and a degassing vessel, in which the respective first and second processes each comprise: (a) bringing a principal olefin and a comonomer into contact with a catalyst under gas phase polymerisation conditions in the reaction vessel to form the respective first or second polymer, wherein said first and second process utilise the same principal olefin but differ in at least one of (i) the comonomer used and (ii) the reaction temperature at which the polymer is produced, and (b) subsequently contacting the respective first or second polymer with a purge gas in the degassing vessel to remove unreacted monomers, characterised in that the method for t
    Type: Application
    Filed: September 21, 2009
    Publication date: June 23, 2011
    Inventor: Jean-Louis Chamayou
  • Publication number: 20110136963
    Abstract: The present invention relates to a process for the preparation of amphiphilic gradient copolymers by Controlled Radical Polymerization in the presence of a RAFT (Reversible Addition Fragmentation Transfer) agent. The copolymers of the invention exhibit low polydispersity indices and low viscosities in solution and are readily soluble in an alkaline medium.
    Type: Application
    Filed: August 11, 2009
    Publication date: June 9, 2011
    Applicant: Arkema France
    Inventor: Laurence Couvreur
  • Publication number: 20110124829
    Abstract: Products and processes relating to the synthesis of copolymers or terpolymers are described. In particular, poly(acrylic acid-co-acrylate ester), poly(methacrylic acid-co-methacrylate ester), poly(acrylic acid-co-acrylate ester(I)-co-acrylate ester(II)), or poly(methacrylic acid-co-methacrylate ester(I)-co-methacrylate ester(II)), by esterification of polyacrylic or polymethacrylic acid with alcohols assisted by the pervaporation technique for extracting water are described.
    Type: Application
    Filed: May 24, 2010
    Publication date: May 26, 2011
    Applicant: King Saud University
    Inventors: Abdullah Saad Alarifi, Taieb Aouak
  • 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
  • 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: 7837950
    Abstract: The invention provides an apparatus and a process for the high pressure polymerization of ethylene, optionally with one or more comonomers, in which unreacted monomer is separated from the polymer in a separation system having at least first, second and third separation vessels and in which off gas from the second vessel is recombined back into the product mixture upstream of the first separation vessel, preferably using a jet pump.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: November 23, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tom Van Nuland, Roger Claessens, Henri Aime Lammens, Geert Vaes
  • Publication number: 20100203006
    Abstract: Embodiments of the invention provide an apparatus or process for devolatilization of flowable materials (such as molten polymers with entrained or dissolved solvent or unreacted monomers or comonomers) using a plate heater having heating channels, the design or operation of which heating channels maintains the flowable material above its bubble point pressure during passage through a larger first zone and then induces flashing in, or downstream of, a smaller second zone of the heating channel. The apparatus enables a higher throughput per heating channel while achieving equivalent or better devolatilization, as compared to current devolatilization apparatus.
    Type: Application
    Filed: February 11, 2010
    Publication date: August 12, 2010
    Applicant: Dow Global Technologies Inc.
    Inventors: Craig S. Taylor, Ravindra S. Dixit, Robert P. Shirtum
  • Patent number: 7705094
    Abstract: The present invention relates to a process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: April 27, 2010
    Assignee: Ineos Europe Limited
    Inventors: Sebastien Hutchette, Patrick Leaney, Frederic Morterol
  • Publication number: 20100004409
    Abstract: A process for the preparation of polyoxymethylene homo- or copolymers (POM) by polymerization of suitable monomers and subsequent deactivation by addition of a deactivator, wherein the deactivator used is a highly branched or hyperbranched polymer A) which is selected from highly branched or hyperbranched polycarbonates A1) and highly branched or hyperbranched polyesters A2), the polymer A) comprising nitrogen atoms.
    Type: Application
    Filed: July 17, 2007
    Publication date: January 7, 2010
    Applicant: BASF SE
    Inventors: Claudius Schwittay, Bernd Bruchmann, Jens Assmann
  • Publication number: 20100004408
    Abstract: A process to perform the finishing of polyolefins produced by gas-phase catalytic polymerization of one or more ?-olefins in the presence of a polymerization diluent selected from a C3-C5 alkane, wherein the polyolefin granules discharged from the gas-phase reactor are subjected to: (1) a first degassing step in which said polyolefin is counter-currently contacted with a gaseous stream containing at least 85% by mol of a stripping agent selected from a C3-C5 alkane, said gaseous stream being continuously derived from the monomer recovery section of the polymerization plant; (2) a second degassing step in which said polyolefin is counter-currently contacted with steam, the amount of steam being from 10 to 200 Kg per 1000 kg of polyolefin.
    Type: Application
    Filed: August 1, 2007
    Publication date: January 7, 2010
    Inventors: Pietro Baita, Giuseppe Penzo, Gabriele Mei
  • Publication number: 20090299018
    Abstract: In a process of manufacturing polylactide, synthesis of high-quality polymers is achieved with a sufficient degree of vacuum secured. Provided is an apparatus for manufacturing polylactide which includes the steps of preparing lactide through oligomerization of lactic acid and depolymerization of the resulting oligomers, effecting ring-opening polymerization of the lactide, and removing unreacted lactide. The apparatus comprises an exhausting gas treatment device for reducing pressure in the step of removing unreacted lactide.
    Type: Application
    Filed: May 27, 2009
    Publication date: December 3, 2009
    Inventors: Kenichiro Oka, Toshiaki Matsuo, Masayuki Kamikawa, Naruyasu Okamoto
  • Patent number: 7601795
    Abstract: The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic acid/ethylene glycol mixture suitable as a starting material for polyester or co-polyester production is obtained from a slurry or cake terephthalic acid product without isolation of a substantially dry terephthalic acid solid.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: October 13, 2009
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Robert Lin, Philip Edward Gibson
  • Patent number: 7598312
    Abstract: A process for preparing a halogenated polymer in a medium comprising liquid or supercritical carbon dioxide, comprising a step involving the radical polymerization of at least one halogenated monomer and at least one step involving cross-flow filtration; and a cross-flow filtration device.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: October 6, 2009
    Assignee: Solvay (Société Anonyme)
    Inventors: Jean-Marie Blaude, Roland Martin
  • Publication number: 20090234083
    Abstract: A solution process for polymerizing one or more ?-olefins of formula CH2?CHR, where R is H or an alkyl radical C1-12, to produce a polymer that is soluble in the reaction medium, the process comprising: (a) polymerization in a solution phase of one or more ?-olefins in the presence of an organo-aluminum compound and a catalyst system comprising a transition metal compound as the catalyst component; (b) the polymeric solution obtained from step a) is then pressurized and transferred by means of a screw pump to a successive step for removing the unreacted monomers from the polymer; wherein the pumping capacity of said screw pump is kept constant by adding the polymeric solution with water at a feeding point upstream the screw pump.
    Type: Application
    Filed: July 18, 2006
    Publication date: September 17, 2009
    Applicant: Basell Poliolefine Italia s.r.l.
    Inventors: Daniele Bigiavi, Giuseppe Penzo
  • Patent number: 7572870
    Abstract: Method of producing vinyllactam copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator under reflux conditions, where following conversion of 90 to 99% by weight of the vinyllactam used, some of the solvent is distilled off and the polymerization is continued.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: August 11, 2009
    Assignee: BASF SE
    Inventors: Rainer Dobrawa, Ralf Widmaier, Eberhard Schupp, Klaus Schnell
  • Publication number: 20090148353
    Abstract: The present invention provides a polymer synthesizer having a high efficiency production rate. The synthesis of the polymers, and more particularly of DNA and RNA, is done very quickly. Furthermore, it is possible to synthesize a plurality of polymers in the same batch without significantly increasing the time and the complexity of the process.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 11, 2009
    Inventor: Thomas Downing
  • Patent number: 7531618
    Abstract: The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: May 12, 2009
    Assignee: Eastman Chemical Company
    Inventor: Bruce Roger DeBruin
  • Patent number: 7485686
    Abstract: A large-scale and efficient industrialization of olefin polymerization by metallocene catalysts is realized by, in olefin polymerization by metallocene-based catalysts, increasing catalytic activity and polymerization efficiency to sufficiently bring out the performances of the metallocene catalysts and maintain a stable polymerization reaction. The amount of a halogen-containing compound is controlled so that the gram-atomic amount ratio to a transition metal of a halogen atom in a halogen-containing compound in solvents and materials other than a halogen atom in a catalyst component is 0.8 or less, in manufacturing plants of commercial level in an olefin polymerization by a metallocene catalyst.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: February 3, 2009
    Assignee: Japan Polypropylene Corporation
    Inventors: Kazuhiro Yamamoto, Kiyoshi Yukawa, Yasuhiro Kashiwagi, Yoichi Maeda
  • Publication number: 20080281058
    Abstract: A process for producing a polymer latex includes a step of mixing at least one kind of polymerizable monomer with water and a polymerization initiator to perform a polymerization, wherein the at least one kind of polymerizable monomer includes an acrylonitrile in an amount of 50 mass % or more based on a total amount of the at least one kind of polymerizable monomer.
    Type: Application
    Filed: December 19, 2007
    Publication date: November 13, 2008
    Applicant: FUJIFILM CORPORATION
    Inventor: Katsumi Araki
  • Publication number: 20080269434
    Abstract: In a process for the preparation of copolymers containing vinyl esters and ethylene or ethylenically unsaturated monomers by aqueous, free radical polymerization at a pressure of from 5 to 100 bar absolute by the emulsion or suspension polymerization method, after the end of the polymerization, the reaction mixture is let down to a pressure of from 0.1 to 5 bar absolute and recovery of unconverted monomers is effected by multistage fractional low-temperature condensation from the residual gas.
    Type: Application
    Filed: December 14, 2006
    Publication date: October 30, 2008
    Applicant: WACKER CHEMIE AG
    Inventors: Mehmet Guenaltay, Manfred Selig