Including Step Of Purifying Monomer Patents (Class 526/77)
  • Patent number: 10307317
    Abstract: The invention relates to an on-site medical gas production plant (100) comprising a unit (50) for purifying gas, such as air, a first compartment (A) for storing purified gas, and a main gas line (10) fluidically connecting the gas purification unit (50) to the said first storage compartment (A). It furthermore comprises an actuated valve (304) arranged on the main gas line (10) upstream of the first storage compartment (A), and furthermore connected to the secondary purifying device (306), as well as an operating device (4) which controls at least the actuated valve (304), and at least a gas analysis device (D2) in fluid communication with the main line (10), and which is in communication with said operating device (4).
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: June 4, 2019
    Assignee: VitalAire Canada Inc.
    Inventors: Paul Edwards, Matthew George Ng, Darrell Raymond Stoodley
  • Patent number: 10273322
    Abstract: The present invention relates to: a polymerizable compound represented by a formula (I), wherein each of Y1 to Y8 independently represents —O—, —O—C(?O)—, —C(?O)—O— or the like; each of A2, A3, G1, and G2 independently represents a divalent linear aliphatic group having 1 to 20 carbon atoms or the like; each of Z1 and Z2 independently represents an alkenyl group having 2 to 10 carbon atoms or the like; Ax represents an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring; Ay represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or the like; A1 represents a trivalent aromatic group or the like; each of A4 and A5 independently represents a divalent aromatic group having 6 to 30 carbon atoms or the like; and Q1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or the like; and others.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: April 30, 2019
    Assignee: ZEON CORPORATION
    Inventor: Kei Sakamoto
  • Patent number: 9809665
    Abstract: A process for production of polyisobutylene includes subjecting a reaction admixture comprising isobutylene, a diluent for the isobutylene, which may be isobutane, and a catalyst composition, that may include a BF3/methanol catalyst complex, to reaction conditions suitable for causing at least a portion of the isobutylene to undergo polymerization to form a polyisobutylene product including polyisobutylene molecules. At least a fraction of the polyisobutylene molecules thus produced have alpha position double bonds and the polyisobutylene product has a number average molecular weight (MN) and a polydispersity index (PDI). The concentration of the diluent in the reaction admixture may be manipulated to control or change any one or more of (a) the relative size of the fraction, (b) the number average molecular weight of the product, (c) the polydispersity index of the product and (d) the relative size of the portion.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: November 7, 2017
    Assignee: TPC GROUP LLC
    Inventors: Klaus R. Menschig, Sohel Shaikh, Sathy R. Ponnuswamy, Rex Lawson
  • Patent number: 9493629
    Abstract: An object of the present invention is to improve, in the raw material rubber compound particularly using a silica-based filler, which is used for tire tread, the balance between the rolling resistance and the skid resistance on a wet road surface and at the same time, improve the wear resistance is enhanced. The present invention provides an oil-extended polymer composition comprising 100 parts by weight of (A) a polymer having a number average molecular weight Mn of 500,000 to 700,000 and a content of a functional group-containing polymer component to be adsorbed to silica of 50 wt % or more, and from 20 to 60 parts by weight of (B) an extender oil.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: November 15, 2016
    Assignee: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Haruo Yamada, Takaaki Matsuda, Yuichi Kitagawa
  • Patent number: 8877828
    Abstract: Provided is a method of producing a curable composition for imprints including (A) a polymerizable monomer, (B) a polymerization initiator, and (C) a solvent which is capable of effectively suppressing lifting or separation of patterns, excellent in coatability, and excellent in time-dependent stability. The method of producing a curable composition for imprints comprises preparing one species of liquid (D) which contains at least either one of the polymerizable monomer (A) and the polymerization initiator (B), passing the liquid (D) through a filter, and then adding the solvent (C).
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: November 4, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Yuichiro Enomoto, Kunihiko Kodama, Shinji Tarutani
  • Patent number: 8859180
    Abstract: [Task to Be Achieved] To provide a chemically amplified type positive copolymer for semiconductor lithography, which has eliminated the problems of prior art, has a high development contrast, and has excellent resolution in fine-pattern formation; a composition for semiconductor lithography which contains the copolymer; and a process for producing the copolymer. [Means for Achievement] The copolymer for semiconductor lithography according to the present invention is a copolymer which has at least (A) a repeating unit having a structure which has an alkali-soluble group protected by an acid-labile, dissolution-suppressing group, (B) a repeating group having a lactone structure and (C) a repeating group having an alcoholic hydroxyl group and which is characterized by having an acid value of 0.01 mmol/g or less as determined by dissolving the copolymer in a solvent and subjecting the solution to neutralization titration with a solution of an alkali metal hydroxide using Bromothymol Blue as an indicator.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: October 14, 2014
    Assignee: Maruzen Petrochemical Co., Ltd.
    Inventors: Tomo Oikawa, Takayoshi Okada, Masaaki Kudo, Takanori Yamagishi
  • Patent number: 8820541
    Abstract: A method for producing a curable composition for imprints includes the step of passing a curable composition containing a polymerizable monomer (A) and a polymerization initiator (B) through a filter having an effective filter area of 200 cm2 or more at least one time. The method suppresses pattern-peeling when peeling the mold employed in forming a pattern using the curable composition for imprints, and thus provides excellent patternability.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: September 2, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Yuichiro Enomoto, Kunihiko Kodama, Shinji Tarutani
  • Patent number: 8703450
    Abstract: The present invention relates to a process for the production of polymers, such as water-absorbing polymer structures, by radical polymerization of acrylic acid, whereby the acrylic acid has been obtained by a synthesis process which comprises as a process step the splitting of an organic material by means of an enzyme or at least one component of an enzyme. The invention also relates to the water-absorbing polymers obtainable by this process, water-absorbing polymers which are based to at least about 25 wt % upon partially neutralized acrylic acid, a composite, a process for the production of a composite, the composite obtainable by this production, the use of acrylic acid in the production of polymers, preferably in the production of water-absorbing polymer structures, a device for the production of acrylic acid, and a process for the production of acrylic acid.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: April 22, 2014
    Assignee: Evonik Degussa GmbH
    Inventors: Günther Bub, Jürgen Mosler, Andreas Sabbagh, Franz-Felix Kuppinger, Franck Furno
  • 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: 8420752
    Abstract: An apparatus (2) includes a neutralization tank (3), a pump (4), a heat exchanger (6), a line mixer (8), a polymerizer (10), a first pipe (12), a second pipe (14), a third pipe (16), a fourth pipe (18), and a fifth pipe (20). Continuously supplied into the neutralization tank (3) are a monomer aqueous solution and a basic aqueous solution, so as to prepare a mixture solution. The mixture solution is circulated through the first pipe (12), the pump (4), the second pipe (14), the heat exchanger (6), and the third pipe (16). The mixture solution is supplied to the polymerizer through the fourth pipe (18).
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: April 16, 2013
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Toshihiro Takaai, Yorimichi Dairoku, Shinichi Fujino
  • 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
  • Publication number: 20120192882
    Abstract: The invention provides a polymer prepared from a substituted 1,3-butadiene (such as neophytadiene) derived from a plant of the Nicotiana species. The invention also provides smoking articles and smokeless tobacco compositions that include the polymers described herein. Further, the invention provides a method of polymerizing a substituted 1,3-butadiene derived from a plant of the Nicotiana species, the method including reacting a substituted 1,3-butadiene derived from a plant of the Nicotiana species with one or more reagents selected from the group consisting of an anionic initiator, a radical initiator, and a Ziegler-Natta catalyst.
    Type: Application
    Filed: January 28, 2011
    Publication date: August 2, 2012
    Inventors: Michael Francis Dube, William Monroe Coleman, III
  • Patent number: 8207291
    Abstract: Process for devolatilization of a polymer of an aromatic alkylene, such as styrene and, in particular, an improved process using water as a stripping agent (i) in which the total amount of water to be disposed of can be reduced, (ii) which allows at least a portion of the water to be recycled as stripping agent, reducing make-up requirements for the stripping agent, and (iii) which allows at least a portion of the aromatic alkylene monomer in the water to be recycled to the polymerization process (via the devolatilization steps) rather than being disposed.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: June 26, 2012
    Assignee: Ineos Europe Limited
    Inventor: Jean-Marc Galewski
  • Publication number: 20120076948
    Abstract: Provided is a method for producing a curable composition for imprints which excellent in patternability. Applied is a method for producing a curable composition for imprints, which comprises passing a curable composition comprising a polymerizable monomer (A) and a polymerizable initiator (B) through a filter having an effective filter area of 200 cm2 or more at least one time.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 29, 2012
    Applicant: FUJIFILM CORPORATION
    Inventors: Yuichiro ENOMOTO, Kunihiko KODAMA, Shinji TARUTANI
  • Publication number: 20120074354
    Abstract: A process for replacing the stabilization of (meth)acrylic monomers, wherein phenothiazine is removed from phenothiazine-containing (meth)acrylic monomers by adsorption on activated carbon, and then a moderately active polymerization inhibitor is optionally added.
    Type: Application
    Filed: May 31, 2010
    Publication date: March 29, 2012
    Applicant: BASF SE
    Inventors: Norbert Herfert, Ulrich Hammon, Renate Wuestefeld
  • Patent number: 8129485
    Abstract: Systems and methods for removing a volatile catalyst poison from a liquid hydrocarbon are provided. In one embodiment, a process vent (106) can be introduced to a vent recovery system (108) to provide a recycle gas (110). A first portion of the recycle gas (112) and a liquid hydrocarbon (102) can be introduced to a stripper column (104) to provide a stripper vent gas (114) and a degassed liquid hydrocarbon (116) that can be introduced to a polymerization process.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: March 6, 2012
    Assignee: Univation Technologies, LLC
    Inventors: Randall L. Force, James L. Swecker, Kevin D. Roy
  • Publication number: 20120027369
    Abstract: A GI type optical fiber of the present invention is a GI type optical fiber having a core component and a cladding component disposed around the outer periphery of the core component, the core component includes a polymer containing at least 55 wt % chlorostyrene monomer and a dopant, and the cladding component includes a polymer of a monomer containing at least 35 wt % methyl methacrylate. It is an object of the present invention to provide a GI type optical fiber in which chlorostyrene is used as the predominant component of the monomer that constitutes the core component, and therefore has excellent transparency and good flexibility, and allows high-speed communication.
    Type: Application
    Filed: February 4, 2010
    Publication date: February 2, 2012
    Inventors: Hirotsugu Yoshida, Tazuru Okamoto, Ryosuke Nakao, Hiroka Inabe, Yuki Masabe, Yasuhiro Koike
  • Patent number: 8084557
    Abstract: A continuous gas-phase process for the polymerization of alpha-olefins, in particular ethylene, comprising passing an alpha-olefin monomer stream through an oil filter in order to reduce the amount of oil to less than 8 ppm, and polymerizing the thus purified monomer feed in gas-phase reactor; the reduction of the amount of oil improves the operability of the plant over time.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: December 27, 2011
    Assignee: Basell Polyolefine GmbH
    Inventors: Manfred Hecker, Markus Schopf, Axel Hamann, Paulus-Petrus Maria de Lange
  • Patent number: 8067512
    Abstract: Monomer/solvent separation and recycle processes for continuous supercritical, solution and advanced solution polymerization processes for propylene-containing polymers and their blends are provided. The advantageous monomer/solvent separation and recycle process includes heating a polymer-lean recycle stream coming from a gravimetric separator positioned downstream of the reactor to form a heated polymer-lean recycle stream, and subsequently combining the heated polymer-lean recycle stream with the one or more homogenous reactor effluent streams to form a heated reactor effluent mixed stream. The heated reactor effluent mixed stream may then be passed through a pressure let-down valve followed and a gravimetric separator, such as to provide for reduced fouling propensity of the polymer-rich phase and sufficient heating of the polymer-rich phase to be able to pass through the remainder of the processing steps to form a propylene based polymer product without additional heat.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: November 29, 2011
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Gabor Kiss, James Richardson Lattner
  • Patent number: 8039528
    Abstract: A method for the manufacture of an adhesive id described, comprising: (A) Providing an initial reaction product of a solution polymerization reaction, the initial reaction product comprising polymer, unreacted polymerizable reactant, non-polymerizable material, and solvent; and (B) Purifying the initial reaction product by adding an oxidizing agent and a reducing agent to the initial reaction product and allowing the unreacted polymerizable reactant in the initial reaction product to further react, thereby providing a second reaction product comprising additional polymer and a lower level of unreacted polymerizable reactant than was present in the initial reaction product.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: October 18, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Dong-Wei Zhu, Cheryl L. Moore, James T. Wolter
  • Patent number: 8013082
    Abstract: The invention provides a process of polymerizing ethylene and at least one ?-olefin, said process comprises polymerizing the ethylene and the at least one ?-olefin in the presence of 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances at the following wavelengths: 320 nm and 343 nm. The invention also provides a method of increasing the catalysts efficiency, and a method of determining the expected catalyst efficiency, each in a polymerization of ethylene and at least one ?-olefin in the presence of the 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances at the above wavelengths. The invention further provides a method of purifying 5-ethylidene-2-norbornene to form a purified 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances of the above wavelengths.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: September 6, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: David L. Ramage, Sarah L. Martin
  • Publication number: 20110166304
    Abstract: The present invention relates to a process for preparing unsaturated aldehydes or unsaturated carboxylic acids by heterogeneous catalytic gas phase oxidation of unsaturated or saturated hydrocarbons, comprising the process steps of: i) providing a gas mixture comprising a saturated hydrocarbon and catalytically dehydrogenating the saturated hydrocarbon in the gas phase to obtain a gas mixture comprising an unsaturated hydrocarbon in a dehydrogenation reactor having a dehydrogenation catalyst material; or ii) providing a gas mixture comprising oxygen and an unsaturated hydrocarbon; iii) catalytically oxidizing the unsaturated hydrocarbon obtained in process step i) or provided in process step ii) in the gas phase to obtain a gas mixture comprising an unsaturated aldehyde in a first oxidation reactor having a first oxidation catalyst material; wherein at least one of the reactors selected from the dehydrogenation reactor, the first oxidation reactor and the second oxidation reactor comprises at least one foam b
    Type: Application
    Filed: July 29, 2009
    Publication date: July 7, 2011
    Inventors: Horst-Werner Zanthoff, Nicole Brausch, Franz-Felix Kuppinger, Jorg Sauer, Andreas Sabbagh, Dennis Fruhling, Markus Weber, Oliver Becker
  • Patent number: 7960485
    Abstract: The invention relates to processes for preparing water absorbing polymers by polymerization of a monomer solution comprising allyl acrylate and/or allyl alcohol, the solution comprising not more than 0.002% by weight of allyl acrylate and/or allyl alcohol, based on acrylic acid, to aqueous monomer solutions for producing water absorbing polymers, to water absorbing polymers, to processes for producing hygiene articles and also to hygiene articles.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: June 14, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Rüdiger Funk, Uwe Stueven, Friedrich-Georg Martin, Jürgen Schröder
  • Patent number: 7932329
    Abstract: Stage I Group 1 metal/porous metal oxide compositions or Stage II Group 1 metal/porous metal oxide compositions are shown to be useful to remove impurities and act as drying agents for various types of solvents and for olefinic monomers used in anionic polymerizations. One important advantage of these compositions is their ability to dry simultaneously solvent and monomers, without inducing a significant polymerization of the latter. Another important characteristic is the capacity of the compositions to be totally inactive toward conventional anionic polymerization which allows them to be left in situ during the polymerization itself.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: April 26, 2011
    Assignees: Signa Chemistry, Inc., Laboratoire de Chimie des Polymeres Organiques
    Inventors: Mana Ito, Stephane Carlotti, Alain Deffieux, Michael Lefenfeld
  • Publication number: 20110046297
    Abstract: The present invention relates to a method for purifying an unpurified phase, containing a target product, preferably (meth)acrylic acid, water, and at least one impurity differing from the target product and from water comprising: a) crystallizing the target product and waters; b) separating the crystals from the mother liquor created in step a); c) melting at least part of the separated crystals to form a melt; and d) recycling at least part of said melt to step b). The invention further relates to a method for the production of a purified phase, containing a target product and water, a method for the production of a polymer based on (meth)acrylic acid, polymers that may be obtained by means of said method, chemical products, such as fibers or molded bodies, and the use of polymers.
    Type: Application
    Filed: March 11, 2009
    Publication date: February 24, 2011
    Inventors: Axel Hengstermann, Franz-Felix Kuppinger, Jorg Leistner, Jurgen Mosler, Peter Jansens
  • Publication number: 20110028664
    Abstract: The invention relates to a superabsorbent polymer that includes a (meth)acrylic acid made by a process that comprises the following process steps: a) (meth)acrylic acid is crystallized out from a mother liquor; b) crystallized (meth)acrylic acid is separated from the mother liquor; c) at least part of the separated (meth)acrylic acid crystals are melted; d) the melted part is at least partially recycled to the step a) or step b). The superabsorbent polymer according to the present invention includes an process to make (meth)acrylic acid, the apparatus suitable for implementing the process, and the use of the apparatus for the production of (meth)acrylic acid characterized by a high purity of the thereby obtainable (meth)acrylic acid as well as by a high efficiency with regard to the achievable yield and necessary energy requirement, thereby providing an improved superabsorbent polymer.
    Type: Application
    Filed: September 13, 2010
    Publication date: February 3, 2011
    Inventors: Stefan Nordhoff, Axel Kobus, Stefan Gross, Hans-Rolf Lausch, Torsten Balduf, Roland Fornika, Guenther Bub
  • Publication number: 20100331502
    Abstract: A continuous gas-phase process for the polymerization of alpha-olefins, in particular ethylene, comprising passing an alpha-olefin monomer stream through an oil filter in order to reduce the amount of oil to less than 8 ppm, and polymerizing the thus purified monomer feed in gas-phase reactor; the reduction of the amount of oil improves the operability of the plant over time.
    Type: Application
    Filed: December 18, 2008
    Publication date: December 30, 2010
    Applicant: Basell Polyolefine GmbH
    Inventors: Manfred Hecker, Markus Schopf, Axel Hamann, Paulus-Petrus Maria De Lange
  • Publication number: 20100286347
    Abstract: The invention relates to a method for producing solutions of vinyl polymers in reactive monomers by a) polymerizing by radical initiation one or more ethylene unsaturated monomers selected from the group comprising vinyl esters, acrylic acid esters, and methacrylic acid esters, and optionally one or more further ethylene unsaturated monomers, and subsequently b) optionally distilling off volatile components, and e) optionally adding one or more inert solvents, d) mixing with one or more reactive monomers, and e) optionally distilling off the inert solvent, characterized in that the vinyl polymers are not present as isolated solids in any of the steps a) through e).
    Type: Application
    Filed: November 10, 2008
    Publication date: November 11, 2010
    Inventor: Thomas Kohler
  • Patent number: 7829654
    Abstract: A process for continuous or discontinuous synthesis of elastomeric copolyesters from polybutylene terephthalate (PBT) and polyoxytetramethylene glycol is described in which the tetrahydrofuran (THF) obtained as a byproduct in synthesis of polybutylene terephthalate from 1,4-butanediol is rectified and then reacted by ring-opening polymerization to form polyoxytetramethylene glycol which condenses with the free or esterified carboxyl groups of PBT to form the copolyester, whereby chain termination and catalyst deactivation are accomplished by adding 1,4-butanediol without separating the catalyst.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: November 9, 2010
    Assignee: Lurgi Zimmer GmbH
    Inventor: Rudolf Kämpf
  • Publication number: 20100261856
    Abstract: Methods for the removal of impurities, for example, carbon monoxide, from a polymerization feed streams are provided.
    Type: Application
    Filed: November 12, 2008
    Publication date: October 14, 2010
    Applicant: UNIVATION TECHNOLOGIES, LLC
    Inventor: Ronald S. Eisinger
  • Publication number: 20100234542
    Abstract: The present invention relates to a process for preparing reactive and essentially halogen-free, especially fluorine-free, polyisobutenes from low-isobutene C4 hydro-carbon mixtures.
    Type: Application
    Filed: June 5, 2007
    Publication date: September 16, 2010
    Applicant: BASF SE
    Inventors: J. Richard Blackborow, Hans Peter Rath
  • Patent number: 7772336
    Abstract: An object of the present invention is to provide highly pure ?-methylstyrene by efficiently removing polar substances present in the ?-methylstyrene. The present invention discloses a method for purifying ?-methylstyrene by reacting polar substances contained in the ?-methylstyrene in the presence of a basic substance, and separating a reaction product of the polar substance and the ?-methylstyrene.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: August 10, 2010
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Yuji Okada, Kenji Ebara
  • Patent number: 7714061
    Abstract: The present invention relates to a process for postcrosslinking water-absorbing polymeric particles in the absence of oxidizing gases, to the water-absorbing polymers preparable by the process and to their use in hygiene articles and packaging materials.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: May 11, 2010
    Inventors: Ulrich Riegel, Thomas Daniel, Uwe Stueven, Mark Elliott
  • Patent number: 7714085
    Abstract: An anionic polymerizable monomer is added to a reaction system in which an anion species which is incapable of initiating polymerization but may react with polymerization inhibiting substances to convert them into compounds that do not inhibit polymerization is present, and then an anion species capable of initiating polymerization is added thereto. It becomes possible to produce high molecular weight polymers and to precisely control the molecular weight thereof even if polymerization inhibiting substances are present in the system or when polymerization inhibiting substances enter from outside.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: May 11, 2010
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Eiji Takahashi, Shoji Yamaguchi
  • Patent number: 7709585
    Abstract: A method for solution polymerizing ethylene wherein an ethane purge stream is separated, subjected to high efficiency cryogenic distillation, and a side cut from that distillation recycled to the polymerization process while the overhead and bottoms from that distillation are removed from the polymerization process.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: May 4, 2010
    Assignee: Equistar Chemicals, LP
    Inventors: Alberto Buchelli, Ronald J. Morris, William G. Todd, Anthony Lee Zimmermann
  • Patent number: 7700698
    Abstract: A process of producing a ring-opening metathesis polymer characterized in that a treatment to decrease the amount of oxygen and/or peroxide in at least one kind of polymerization starting material is performed prior to the ring-opening metathesis polymerization reaction of a cyclic olefin performed in the presence of a ruthenium carbene complex (catalyst). Treatments to decrease the amount of oxygen and/or peroxide include applying an adsorbent to a polymerization starting material to remove oxygen and/or peroxide by adsorption, applying an antioxidant to a polymerization starting material to decompose oxygen or peroxide, and the like.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: April 20, 2010
    Assignee: Kuraray Co., Ltd.
    Inventors: Hideharu Iwasaki, Yasutaka Inubushi
  • Patent number: 7651635
    Abstract: The invention provides a composition of matter and a method of its use in preventing unwanted polymerization reactions. The composition comprises an inhibitor and a retarder. The inhibitor is highly effective. The retarder is reliable under extreme and emergency situations. The inhibitor can be an alkylhydroxylamine. The retarder can be a 7-cyano-quinone methide. The combination of the inhibitor and retarder has been found to be far more effective than expected.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: January 26, 2010
    Assignee: Nalco Company
    Inventor: Vincent E. Lewis
  • Publication number: 20090105430
    Abstract: Stage I Group 1 metal/porous metal oxide compositions or Stage II Group 1 metal/porous metal oxide compositions are shown to be useful to remove impurities and act as drying agents for various types of solvents and for olefinic monomers used in anionic polymerizations. One important advantage of these compositions is their ability to dry simultaneously solvent and monomers, without inducing a significant polymerization of the latter. Another important characteristic is the capacity of the compositions to be totally inactive toward conventional anionic polymerization which allows them to be left in situ during the polymerization itself.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 23, 2009
    Applicants: SIGNA CHEMISTRY, INC., Laboratoire de Chimie des Polymeres Organiques, ENSCPB-CNRS
    Inventors: Mana ITO, Stephane CARLOTTI, Alain DEFFIEUX, Michael LEFENFELD
  • Publication number: 20090076232
    Abstract: A process for operating a continuous removal of a target product X in the form of fine crystals of a liquid phase P comprising the target product X and constituents other than the target product X by cooling suspension crystallization in the secondary chamber of an indirect heat exchanger to which liquid phase P flows continuously with simultaneous continuous flow through the primary chamber of the indirect heat exchanger with a coolant, and continuous withdrawal of a crystal suspension S having a degree of crystallization Y from the secondary chamber in two operating states I and II, wherein the coolant temperature is lower, the mass flow of liquid phase P is greater and the molar proportion of the constituents other than the target product X in the liquid phase P in operating state II is greater than in operating state I.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 19, 2009
    Applicant: BASF SE
    Inventors: Jorg HEILEK, Ulrich Hammon, Klaus Joachim Muller-Engel
  • Patent number: 7497896
    Abstract: Methods for treating a gas mixture of at least propylene and propane, in order to separate the propylene from the propane. The gas mixture is brought into contact with a membrane enables the selective permeation of the propylene with respect to the propane. A propylene-enriched permeate and a propane-enriched retentate is formed. The propylene concentration of the permeate in the membrane is then reduced with a sweeping gas.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: March 3, 2009
    Assignee: L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes George Claude
    Inventors: Emmanuelle Bromet, Guillaume De Souza, Olivier Riu
  • Publication number: 20090035334
    Abstract: This invention provides a method for preparing a polymethylmethacrylate spherical bead and in particular, it provides a method for preparing a polymethylmethacrylate spherical bead characterized in that it is prepared by preparing polymethylmethacrylate by polymerizing methyl-methacrylate monomers, evaporating remaining methylmethacrylate monomers by raising temperature up to at least 100° C. after the polymerization reaction, and washing the polymethylmethacrylate with a mixed solvent of ethanol and water and vacuum drying them.
    Type: Application
    Filed: August 26, 2005
    Publication date: February 5, 2009
    Applicant: SUNJIN CHEMICAL CO., LTD.
    Inventors: Sun-jae Kim, Hyoung-whee Kim, Suk-woo Shin, Han-song Chu
  • Publication number: 20090030165
    Abstract: A method is provided herein for purifying (meth)acrylic acid to provide a purified (meth)acrylic acid product having a low aldehyde concentration and not more than 0.2 wt % water. One embodiment of the method includes distilling (meth)acrylic acid in the presence of an aldehyde treating compound. Another embodiment of the method includes also distilling crude (meth)acrylic acid in the presence of a reactive drying agent. (Meth)acrylic acid produced in this manner is especially suitable for use in specialty (meth)acrylic acid polymers, such as for example superabsorbent polymers, binders, and ethylene-(M)AA copolymers.
    Type: Application
    Filed: July 21, 2008
    Publication date: January 29, 2009
    Inventors: Abraham Benderly, Michael Stanley DeCourcy, Alan Sopchik
  • Patent number: 7449048
    Abstract: The invention provides a method of reusing an inert gas in a polymer production plant by removing impurities such as a polymerization solvent and polymerization monomers from an inert gas discharged from a polymer production plant. The method of reusing an inert gas comprises a step of adsorbing and removing a polymerization solvent and polymerization monomers contained in an inert gas by passing, through an adsorbent layer, an inert gas discharged from a polymer production plant, wherein an inert gas reaching a predetermined purity by removing the polymerization solvent and polymerization monomers in the step of adsorption and removal is reused in the polymer production plant.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: November 11, 2008
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hiroto Nishida, Kenta Tsubohara, Etsurou Okamoto, Yoshiaki Deguchi
  • Publication number: 20080214750
    Abstract: The invention relates to processes for preparing water absorbing polymers by polymerization of a monomer solution comprising allyl acrylate and/or allyl alcohol, the solution comprising not more than 0.002% by weight of allyl acrylate and/or allyl alcohol, based on acrylic acid, to aqueous monomer solutions for producing water absorbing polymers, to water absorbing polymers, to processes for producing hygiene articles and also to hygiene articles.
    Type: Application
    Filed: November 16, 2005
    Publication date: September 4, 2008
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Uwe Stueven, Rudiger Funk, Friedrich-Georg Martin, Jurgen Schroder
  • Patent number: 7238743
    Abstract: The present invention provides a process for producing a water-absorbent resin of which the residual monomer content and the extractable content are low. The process for producing a water-absorbent resin comprises the step of polymerizing at least one monomer component including acrylic acid and/or its salt as major components to produce a water-absorbent resin that is a neutralized salt, and this process is characterized in that the acrylic acid is a product obtained by catalytic gas phase oxidation of propylene and/or propane and has a protoanemonin content of not more than 10 ppm, and in that the resultant water-absorbent resin has a neutralization ratio of not less than 50 mol %.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: July 3, 2007
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Yukihiro Matsumoto, Kunihiko Ishizaki, Teruyuki Kanto
  • Patent number: 7179870
    Abstract: The invention relates to a process for the preparation of poly(?-methylstyrene) by anionic polymerization of the ?-methylstyrene monomer, said process successively comprising the following stages: a) a stage of preparation of a solution comprising the ?-methylstyrene monomer and a nonpolar aprotic solvent; b) a stage of neutralization of the solution prepared in a) comprising the addition, to this solution, of an effective amount of at least one monofunctional organometallic initiator, so as to neutralize the proton sources of the solution prepared in a); c) a stage of cooling the solution obtained in b) to a temperature of less than 0° C.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: February 20, 2007
    Assignee: Commissariat A L'Energie Atomique
    Inventors: Alexia Balland-Longeau, Marc Calonne, Franck Jousse, Jean-Marie Catala
  • Patent number: 7141631
    Abstract: It is an object of the present invention to provide a non-conjugated cyclic diene and a non-conjugated cyclic diene composition which enable the production of a polymer based on non-conjugated cyclic diene which makes it possible to produce a (co)polymer at a high degree of polymerization activity, and a method of producing a polymer based on non-conjugated cyclic diene which makes it possible to produce a (co)polymer at a high degree of polymerization activity. A non-conjugated cyclic diene is used which meets at least one of the following requirements: (1) it contains a compound having a seven-membered cyclic triene hydrocarbon structure in a specific amount or less and (2) it contains a conjugated polyene compound having an eight-membered bicyclic hydrocarbon structure in a specific amount.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: November 28, 2006
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Toshio Murakami, Hidetatsu Murakami, Yasuhiro Takano, Kenji Doi, Akira Kumagae, Yasuhiro Hasada, Toshizi Nishimura
  • Patent number: 7141630
    Abstract: A polymerization process is provided. For example, a polymerization process is described, including contacting olefin monomers with a supported metallocene catalyst to polymerize the olefin monomers and form a product mixture that includes polyolefins macromers or polymers, unreacted or partially reacted olefin monomers, alcohols and organohalides. The polymerization process further includes removing a portion of the product mixture to form a recycle stream and passing the recycle stream through a removal device comprising zeolite particles having pore size of from 6 to 16 ? to transfer at least a portion of the alcohols and organohalides from the recycle stream to the removal device providing a purified recycle stream having alcohols and organohalides in an amount of 1 ppm or less. The polymerization process may further include contacting at least a portion of the purified recycle stream with the supported metallocene catalyst to form polyolefins.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: November 28, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: James Charles Vizzini, Ted Alexander Powell, Shiaw Tzuu Ju
  • Patent number: 7067597
    Abstract: This invention concerns using an intermediate grade propylene stream as feed to a polypropylene forming reaction system. The intermediate grade propylene stream is preferably recovered form the olefin product of an oxygenate to olefins reaction process, and low in dimethyl ether content.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: June 27, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Cor F. Van Egmond, Lawrence C. Smith
  • Patent number: 7049366
    Abstract: In order to produce inexpensively with high productivity a water-absorbent resin of which: the residual monomer content and the water-extractable content are both low, and the properties are high, and the colorability is low; there is provided a process for producing a water-absorbent resin, which is a process for producing a crosslinked water-absorbent resin by polymerizing a monomer component including acrylic acid and/or its salt in a major proportion wherein the acrylic acid is a product obtained by catalytic gas phase oxidation of propylene and/or propane, with the process being characterized by comprising the steps of: preparing the monomer component from an acrylic acid composition that includes the unneutralized acrylic acid and a methoxyphenol and has a methoxyphenol content of 10 to 160 ppm by weight (based on the unneutralized acrylic acid); and then carrying out radical and/or ultraviolet polymerization of the resultant monomer component.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: May 23, 2006
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Sei Nakahara, Kunihiko Ishizaki, Hirotama Fujimaru, Yasuhisa Nakashima, Kazuhiko Sakamoto