Steam Stripping Or Steam Distilling Patents (Class 528/500)
  • Patent number: 10227420
    Abstract: A method for preparation of decontaminated natural rubber is provided. The method is characterized in that it comprises a decontamination step in which wet natural rubber coagulum passes through a system comprising an extruder and a filter installed at the extruder outlet, the extruder comprising an axially symmetrical grooved sheath comprising in its thickness grooves opening on the inner surface of the sheath.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: March 12, 2019
    Assignee: COMPAGNIE GENERALE DES ESTABLISSEMENTS MICHELIN
    Inventors: Jérôme Dussillols, Jean-Luc Merceron
  • Patent number: 9261801
    Abstract: The present embodiments disclose processes for preparing a polyester latex containing an amount of residual organic solvent which is less than 100 ppm by weight of the total weight of the polyester latex.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: February 16, 2016
    Assignee: XEROX CORPORATION
    Inventors: Yu Liu, Frank Ping-Hay Lee, Michael D'Amato, Yulin Wang, David Borbely, Harry Latchman, John Abate, Ivan Uschak, Rashid Mahmood, Ke Zhou, Marko Saban, Biritawit Asfaw
  • Patent number: 9090746
    Abstract: A process for the removal of solvent from a polymeric solution including at least one elastomeric polymer. The polymeric solution is subjected to a stripping step by means of water vapor, in the presence of a dispersant system including: from 0.005% by weight to 1% by weight, with respect to the total weight of the dry elastomeric polymer, of at least one lamellar material; from 0.0005% by weight to 1% by weight, with respect to the total weight of the dry elastomeric polymer, of at least one cationic surfactant.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: July 28, 2015
    Assignee: VERSALIS S.P.A.
    Inventors: Maria Parisi, Piero Maestri
  • Patent number: 8816045
    Abstract: The present invention relates to a method of removing volatile organic compounds (VOCs) from a latex using a membrane.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: August 26, 2014
    Assignees: Dow Global Technologies LLC, Regents of the University of Minnesota
    Inventors: Timothy C. Frank, Edward L. Cussler
  • Patent number: 8691937
    Abstract: A method of preparing a low odor polymer latex composition includes the step of polymerizing a monovinylidene monomer, such as styrene, and a conjugated diene, such as butadiene, in the presence of a linear alkyl thiol chain transfer agent. The resulting polymer latex is treated with an oxidizing agent to oxidize residual chain transfer agent to volatile decomposition products that are then removed by steam stripping.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: April 8, 2014
    Assignee: Styron Europe GmbH
    Inventors: Bernard Fouchet, Gerold Lohmueller, Patric Eckerle
  • Patent number: 8557949
    Abstract: Process for the production of di- and poly(diamino diphenyl methane) comprising the steps of (a) reacting aniline and formaldehyde in the presence of an acid catalyst to produce a reaction mixture containing di- and polyamines; (b) neutralizing the reaction mixture containing di- and polyamines; (c) separating the neutralized reaction mixture into an organic phase containing di- and polyamines and an aqueous phase; (d) further treating the organic phase separated off in step (c) by (d1) washing with water followed by (d2) separating the washed mixture into an organic phase and an aqueous phase and (d3) further fractionation of the organic phase to produce purified di- and polyamines on the one hand and aniline/water on the other hand; (e) further treating the aqueous phase separated off in step (c) by (e1) washing with aniline followed by (e2) separating the washed mixture into an aqueous phase and an organic phase and (e3) further treatment of the aqueous phase to remove the aniline thereby leaving an efflu
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: October 15, 2013
    Assignee: Huntsman International LLC
    Inventors: Robert Carr, Johannes Lodewijk Koole, Willem Van Der Borden
  • Patent number: 8530618
    Abstract: Process for recovering a polymer by injection of steam, and optionally liquid water, into a solution of this polymer comprising a polar aprotic organic solvent (PAOS) that has an azeotrope with water and an apolar organic compound that is miscible with the PAOS and immiscible with water and that acts as a phase separation agent (PSA), the boiling point of which is below that of the water/PAOS azeotrope, the amount of steam injected being sufficient to give rise to the substantial removal of the PSA via stripping and that of the PAOS via azeotropic distillation, and the total amount of water being sufficient to give rise to the precipitation of the polymer, this process being characterized in that the polymer solution also comprises an alcohol, at least during the precipitation of the polymer.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: September 10, 2013
    Assignee: Solvay
    Inventors: Jean-Christophe Lepers, Denis Geets, Jean-Raphael Caille
  • Patent number: 8507643
    Abstract: A composition comprising glycerol and at least one cyclic oligomer of glycerol, a process for obtaining the composition, and its use in the manufacture of dichloropropanol and of derived products such as epichlorohydrin and epoxy resins.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: August 13, 2013
    Assignee: Solvay S.A.
    Inventors: Patrick Gilbeau, Bruno Jestin
  • Patent number: 8497326
    Abstract: Disclosed are ionomer compositions neutralized by a combination of cesium and potassium that have antistatic properties. Also disclosed are articles, including laminates and monolayer or multilayer structures comprising such compositions to which neither powders nor dusts easily adhere electrostatically.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: July 30, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Kazuyuki Nakata, David J. Walsh
  • Patent number: 8481675
    Abstract: A process for recycling a polymer blend necessarily containing PLA, comprising grinding, compacting, dissolving in a solvent of PLA, removing the undissolved contamining polymers, alcoholysis depolymerisation reaction and purification steps.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: July 9, 2013
    Assignee: Galactic S.A.
    Inventors: Philippe Coszach, Jean-Christophe Bogaert, Jonathan Willocq
  • Patent number: 8431677
    Abstract: Method for purifying a conventional polymer stream (PE, PP, PET, PVC, etc.) contaminated with not more than 50% PLA, comprising steps for the suspension of the polymer with solubilisation of the PLA fraction and the recovery of the purified polymer after separation.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: April 30, 2013
    Assignee: Galactic S. A.
    Inventors: Philippe Coszach, Jonathan Willocq
  • Patent number: 8420702
    Abstract: Process for recycling a fiber reinforced polymer article, according to which the article, eventually cut in fragments, is dissolved in a solvent capable of dissolving the polymer but not the fibers and which is susceptible of forming an azeotrope with water, forming a solution; the fibers are recovered from the solution; the fibers are washed with solvent by putting them in the form of a slurry in the solvent and by agitating the slurry and/or by making the solvent circulate through it; the washed fibers are recovered from the slurry; and the recovered fibers are submitted to a stripping with steam in order to substantially remove the solvent.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: April 16, 2013
    Assignee: Solvay S.A.
    Inventors: Jacques Van Weynbergh, Stephane Noel
  • Patent number: 8344099
    Abstract: A method for treating polymer particles with steam in a steaming vessel downstream a polymerization process, the method comprising contacting polymer particles with a counter-current flow of steam, wherein the flow rate of steam entering said steaming vessel is continuously maintained proportional to the production rate of said polymer in said polymerization process and to the gradient between the temperature (Tout) of the polymer exiting said steaming vessel and the temperature (Tin) of the polymer entering said steaming vessel.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: January 1, 2013
    Assignee: Basell Poliolefine Italia s.r.l.
    Inventors: Giorgio Ballarini, Antonio Mileo, Luca Soffritti, Enrico Soffritti, legal representative
  • Patent number: 8338563
    Abstract: Method for purifying a solution of at least one plastic in a solvent, the said solution comprising insolubles, whereby the solution is purified using a centrifugal settler.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: December 25, 2012
    Assignee: Solvay (Societe Anonyme)
    Inventor: Bernard Vandenhende
  • Patent number: 8334362
    Abstract: An apparatus and method for determining the standardized melt elasticity (sME) force of a thermoplastic polymer needed to stretch a strand of melted polymer at a speed about thirty three times faster than the speed of strand formation from a body of melted polymer under constant stress from an unencumbered dead weighted piston.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: December 18, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Mark D. Alpeter, Marc A. Mangnus, Charles M. Cheatham, Marinus G. Nieuwenhuize, Jack M. Potter, Jr.
  • Patent number: 8252892
    Abstract: A process for obtaining an elastomer in solid phase from its polymer solution which comprises: (a) optionally pre-concentrating the polymer solution coming from the production system by a flash process; (b) subjecting the polymer solution to a concentrating stripping operation by water vapor in a mixing device comprising internal moveable mixing parts which transfer minimal mechanical energy to the solution in the form of friction heat; and (c) subjecting the concentrated polymer phase coming from (b) to devolatilization by mechanical energy and/or vapor flow to remove residual solvent.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: August 28, 2012
    Assignee: Polimeri Europa S.p.A.
    Inventors: Fabio Montanari, Federica Mainardi, Gabriele Veneri
  • 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
  • Patent number: 8143371
    Abstract: This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof having a number-average molecular weight of at least about 250 g/mole by a polycondensation reaction using at least one acid catalyst.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 27, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Andrew Harmer, Christian Hoffmann, Scott Christopher Jackson, Edward R. Murphy, Rupert Spence
  • Patent number: 8058389
    Abstract: Brominated polybutadiene polymers are recovered from a bromination reaction solution by forming the solution into droplets, thermally stripping the solvent from the droplets, and then washing the resulting particles. The washed particles are then recovered from the washing liquid. The droplets can be dispersed into a gaseous medium such as air and then transferred into a nonsolvent liquid for washing, or can be formed directly into the nonsolvent liquid. The process forms a particulate polymer material that is easily filterable and has low levels of volatile impurities and inorganic salts. Brominated polybutadiene polymers recovered in this manner are often very thermally stable.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: November 15, 2011
    Assignee: Dow Global Technologies LLC.
    Inventors: Ronald B. Leng, Avani M. Patel, Brian D. Scherzer, Derrick G. Wetters, Douglas C. Greminger
  • Patent number: 8053550
    Abstract: Process for the purification of a vinyl chloride polymer (PVC) comprising at least one compound of a heavy metal, according to which: (a) the PVC is dissolved in a water-miscible polar organic solvent; (b) an aqueous solution comprising a reagent, which is either a base capable of reacting with the compound of the heavy metal (R1) or a dispersing agent capable of stabilizing the said compound (R2), is added to the organic solution, the water being introduced in an amount (Q) such that it brings about the formation of a two-phase medium, the continuous phase of which is the organic phase; (c) the two-phase medium is subjected to stirring for a time sufficient for the reagent to be able to interact with (exert its effect on) the compound of the heavy metal; (d) the precipitation of the PVC out of this two-phase medium is brought about.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: November 8, 2011
    Assignee: Solvay (Societe Anonyme)
    Inventors: Eric Fassiau, Murielle Manin
  • Patent number: 7985778
    Abstract: Synthetic resin containing ester bond is subjected to hydrolysis treatment to reclaim raw material component before polymerization. Method for decomposing and reclaiming synthetic resin having ester bond in composition structure thereof, by conducting hydrolysis treatment and then separation collection treatment. In the hydrolysis treatment, article containing synthetic resin to be decomposed and reclaimed is exposed to water vapor atmosphere filled under saturation water vapor pressure at treatment temperature at or below melting point of the synthetic resin. The synthetic resin in article to be treated is hydrolyzed by water vapor generated at the treatment temperature, to generate decomposition product before polymerizing to the synthetic resin containing an ester bond. The separation collection treatment is treatment in which the decomposition product generated by the hydrolysis treatment is separated into liquid component and solid component to be collected individually.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: July 26, 2011
    Inventor: Koichi Nakamura
  • Patent number: 7977453
    Abstract: The present invention relates to processes for hydrolyzing polyphosphoric acid in shaped articles.
    Type: Grant
    Filed: March 27, 2006
    Date of Patent: July 12, 2011
    Assignees: E. I. du Pont de Nemours and Company, Magellan Systems International, LLC
    Inventor: Christopher William Newton
  • Patent number: 7943676
    Abstract: A method of recycling waste plastic foam materials firstly is to smash a waste material including polyurethane foam into fine particles so as to obtain a first starting material. The first starting material is then crisped and followingly milled into powder so as to obtain a second starting material. The second starting material is then placed into a mixer to mix with a first foaming reaction solution including polyol, catalyst and additives injected into the mixer so as to form a semi-treated foaming material. And then, the semi-treated foaming material is mixed with a second foaming reaction solution including diisocyanate injected into the mixer so as to obtain a completed-treated foaming material. Lastly, the completed-treated foaming material is poured into a mold and then water vapor is uniformly introduced into the mold so as to induce the completed-treated foaming material to proceed foaming reaction.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: May 17, 2011
    Inventor: Kun-Huang Chang
  • Patent number: 7893195
    Abstract: Method for recovering a polymer from a liquid medium (1) substantially containing the polymer and a solvent for the latter, wherein: (a) this liquid medium (1) is injected into a reactor (2) containing a stirred substantially monophase liquid mixture comprising a major fraction by weight of a non-solvent and a minor fraction by weight of a solvent, the mixture having a composition and temperature such that the polymer precipitates therefrom progressively; (b) the polymer is recovered in the form of particles in suspension (5) in a liquid rich in non-solvent; (c) the polymer particles (9) are separated from the liquid.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: February 22, 2011
    Assignee: SOLVAY (Societe Anonyme)
    Inventors: Eric Fassiau, Bernard Vandenhende, Jean-Raphael Caille, Jean-Christophe Lepers
  • Patent number: 7846986
    Abstract: Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent introduced gradually into the solution to form the precipitation medium, whereby: in the course of the introduction of the non-solvent into the precipitation medium, there is first a phase separation (into a continuous phase rich in solvent, in which the polymer is dissolved, and into a disperse phase, consisting of droplets rich in non-solvent) and then there is a phase inversion (the continuous phase then becoming the phase rich in non-solvent, and the disperse phase becoming the phase rich in solvent containing the dissolved polymer) the non-solvent is initially introduced into the precipitation medium in liquid form only and in a quantity (Q?) which is not zero but is less than the quantity (Q) required to bring about the phase inversion, and is subsequently introduced into the precipitation medium at least partly in vapour form.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: December 7, 2010
    Assignee: Solvay S.A.
    Inventors: Eric Fassiau, Denis Geets
  • Patent number: 7812061
    Abstract: A method for manufacturing a recycled polycarbonate raw material for a flame retardant resin composition from discarded and/or recovered optical discs using a polycarbonate resin as a substrate material, and includes (a) a step to identify if 2,2-bis(4-hydroxyphenyl)propane as a divalent phenol of the polycarbonate resin raw material is polymerized as the sole raw material in the polycarbonate resin as the substrate material of the discarded and/or recovered optical discs and (b) a step to remove impurities by a chemical treatment by separating only the discarded and/or recovered optical discs, wherein the polycarbonate resin is identified as polymerized by using 2,2-bis(4-hydroxyphenyl)propane as the sole raw material.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 12, 2010
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventor: Toshio Isozaki
  • Patent number: 7803253
    Abstract: A dehydration method of a water-containing substance using a liquefied matter, including a step (1) of contacting a liquefied matter of a substance which is in a gas phase under a condition at ambient temperature and atmospheric pressure with the water-containing substance, to dissolve contained water in the water-containing substance into the liquefied matter, for obtaining the liquefied matter containing a large amount of water; and a step (2) of vaporizing the substance out of the liquefied matter containing a large amount of water, to thereby separate the substance as the gas from water.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: September 28, 2010
    Assignee: Central Research Institute of Electric Power Industry
    Inventors: Hideki Kanda, Youichi Urakawa
  • Patent number: 7790777
    Abstract: Process for recovering at least one polymer in solution in a solvent by precipitation by means of a non-solvent fluid, whereby the precipitation takes place in a precipitation medium comprising two dispersants of which one [dispersant(I)] has a greater affinity for the non-solvent and the other [dispersant (II)] has a greater affinity for the solvent.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: September 7, 2010
    Assignee: Solvay S.A.
    Inventors: Eric Fassiau, Denis Geets
  • Patent number: 7790804
    Abstract: The invention provides a process for the purification of polymer polyols that ensures a reduction of acrylonitrile, styrene as well as the residual amounts of optionally used chain regulator, and of occurring recombination products of the initiator when azo initiators are used, to levels of <25 ppm of acrylonitrile, <50 ppm styrene, <50 ppm chain regulator and <280 ppm of recombination products by stripping using packed columns.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: September 7, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Michael Brockelt, Ludwig Deibele, Manfred Dietrich, Markus Hadley, Jan Thomas Leu, Guido Naberfeld, Ralf Dohrn
  • Patent number: 7786254
    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: Grant
    Filed: August 1, 2007
    Date of Patent: August 31, 2010
    Assignee: Basell Polyolefine GmbH
    Inventors: Pietro Baita, Giuseppe Penzo, Gabriele Mei
  • Patent number: 7745568
    Abstract: A process is provided for recovering polymer solids from a polymerisation reactor effluent. The process comprises extracting the polymerisation effluent from a polymerisation reactor; passing the effluent, or a part thereof, to a flash vessel for flashing liquid in the effluent to vapour, and removing said vapour from said flash vessel; passing the polymer solids from the flash vessel to a transfer apparatus which comprises a transfer vessel; passing the polymer solids from the transfer vessel to a purging means for removing residual liquid from the polymer solids; wherein the polymer solids are passed from the flash vessel to the purging means in a continuous flow such that a quantity of polymer solids is maintained in the transfer vessel. An apparatus for performing the process is also provided.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: June 29, 2010
    Assignee: Total Petrochemicals Research Feluy
    Inventor: Hugo Vandaele
  • Patent number: 7745567
    Abstract: A process for continuously stripping a polymer dispersion comprising a heat exchanger with minimal internal obstructions for the stripper. The process is particularly adapted to dispersions that are heat and shear sensitive. The process is able to extract hydrophobic VOC's more efficiently than a single, jacketed tube design.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: June 29, 2010
    Assignee: Rohm and Haas Company
    Inventors: James Kent Carpenter, Adam Loyack
  • Patent number: 7736525
    Abstract: A method of making an alkoxylated polyethyleneimine (APEI) product having reduced discoloration includes treating a composition including a component selected from the group of polyethyleneimine (PEI), APEI intermediate, and combinations thereof that is used to make the APEI product. The method of treating the composition includes heating a composition that includes an adduct of a conjugate base and PEI, water, and the component at a temperature of from 158 to 338° F. for a period of at least three hours in the absence of additional water in order to substantially decompose the adduct in the composition. The aqueous solutions of APEI product thus made have Gardner color values of less than 6.
    Type: Grant
    Filed: February 7, 2006
    Date of Patent: June 15, 2010
    Assignee: BASF Corporation
    Inventors: Chacko Thankachan, Klaus J. Friedrich, Daniel E. Coker
  • Publication number: 20100130719
    Abstract: The present invention relates to a process for devolatilization of a polymer of an aromatic alkylene, such as styrene, and in particular, to 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 polymerisation process (via the devolatilization steps) rather than disposed of.
    Type: Application
    Filed: June 3, 2008
    Publication date: May 27, 2010
    Inventor: Jean-Marc Galewski
  • Patent number: 7723466
    Abstract: A tackifier resin is provided comprising monomer units from at least one aromatic monomer and at least one acrylate monomer; wherein the tackifier resin has a low residual monomer concentration. In other embodiments of the invention, the tackifier resin does not significantly decrease the moisture vapor transport rate of an adhesive composition comprising the tackifier resin, does not significantly increase fogging of an adhesive composition comprising the tackifier resin, and does not significantly exhibit skin sensitivity properties. A process to produce the tackifier resin is also provided. The process comprises contacting a tackifier resin product stream with at least one carrier at a temperature sufficient to remove a portion of at least one residual monomer from the tackifier resin product stream to produce the tackifier resin.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: May 25, 2010
    Assignee: Eastman Chemical Company
    Inventors: Michel Hendrikus Theelen, Derek William Bamborough, Elisabeth Eduarda Catharina Geertruida Gielens
  • Patent number: 7579385
    Abstract: Disclosed are dried porous crumbs of a hydrogenated block copolymer which is obtained by hydrogenating a block copolymer comprising (a) at least one polymer block composed mainly of aromatic vinyl monomer units and (b) at least one polymer block composed mainly of conjugated diene monomer units, and which has a molecular weight of 70,000 or more. The dried porous crumbs have a water content of 1% by weight or less and having the capability of absorbing an oil in an amount of 1.0 or more, in terms of the ratio of the weight of an oil, which is absorbed by the dried porous crumbs when the dried porous crumbs are immersed in the oil at 25° C. under atmospheric pressure for 1 minute, to the weight of the dried porous crumbs. Also disclosed is a method for producing the same.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: August 25, 2009
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yasumasa Yamakoshi, Toshinori Shiraki, Masami Kamaya
  • Patent number: 7541427
    Abstract: An objective of the present invention is to provide a desolvation method for removing a solvent efficiently from a polymer solution. In the present desolvation method where the solvent is removed from the polymer solution by steam stripping using an apparatus comprising a pipe which connects a gas phase portion of a desolvation tank at the downstream and a liquid phase portion of a desolvation tank at the upstream, and an opening-degree adjusting mean (for example, pressure adjusting valve) fixed to this pipe, pressures are controlled such that a pressure difference (?P=P2?P1) between pressures of each gas phase portion of desolvation tanks at the downstream and at the upstream is allowed to be larger by from 0.005 to 0.6 MPa, preferably from 0.05 to 0.3 MPa than a pressure difference when the opening-degree adjusting mean is fully opened.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: June 2, 2009
    Assignees: JSR Corporation, International Center for Environmental Technology Transfer
    Inventors: Nobuaki Katayama, Katsunori Ishii, Naritsugu Kumai
  • Patent number: 7517946
    Abstract: In the dehydration step, a mixture comprising an organic amide solvent and a sulfur source is heated, vapor volatilized is guided to a distillation column, a fraction comprising the organic amide solvent as a principal component is refluxed into a reaction vessel, a fraction comprising water and hydrogen sulfide is cooled to discharge hydrogen sulfide that is not condensed by the cooling and reflux a part of water condensed into the distillation column, the remaining water is discharged, a relational expression between the total amount of water of an amount of water refluxed and an amount of water discharged without being refluxed, and an amount of hydrogen sulfide discharged from the reaction vessel is determined in advance, and an amount of hydrogen sulfide discharged from the reaction vessel is calculated out from a measured value of the total amount of water on the basis of the relational expression to control a charged molar ratio of the sulfur source to a dihalo-aromatic compound.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: April 14, 2009
    Assignee: Kureha Corporation
    Inventors: Hiroyuki Sato, Tatsuya Kawasaki, Yasushi Nakazawa
  • Patent number: 7393915
    Abstract: The object of this invention is to provide a new process for producing polyorganosiloxane-containing resin which comprises reducing volatile siloxane, characterized in that polyorganosiloxane-containing resin in a slurry state is heat-stripped in producing polyorganosiloxane-containing resin.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: July 1, 2008
    Assignee: Kaneka Corporation
    Inventors: Kazunori Saegusa, Tomoyuki Yoshimi, Hiroshi Tone
  • Publication number: 20080103289
    Abstract: A process for continuously stripping a polymer dispersion comprising a heat exchanger with minimal internal obstructions for the stripper. The process is particularly adapted to dispersions that are heat and shear sensitive. The process is able to extract hydrophobic VOC's more efficiently than a single, jacketed tube design.
    Type: Application
    Filed: October 29, 2007
    Publication date: May 1, 2008
    Inventors: James Kent Carpenter, Adam Loyack
  • Patent number: 7364668
    Abstract: The present invention provides a process for producing an amino composition by addition reaction between a polyamine and an unsaturated hydrocarbon compound in the presence of a strongly basic alkali metal catalyst to obtain an amino composition containing not more than 2% by weight of unreacted polyamine and preferably not more than 10 ppm of alkali metal.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: April 29, 2008
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Hisayuki Kuwahara, Tsutomu Numoto, Masatoshi Echigo, Shun Ogawa
  • Patent number: 7345132
    Abstract: Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: March 18, 2008
    Assignee: Chang Chun Plastics Co. Ltd
    Inventors: Noriaki Saito, Ichishi Aizu, Nobuyuki Nakajima, Masahiro Fujiwara, Koji Yano
  • Patent number: 7314909
    Abstract: A poly(arylene ether)/polystyrene blend may be prepared by melt kneading a carboxylic acid compound, a poly(arylene ether), and a polystyrene to form an intimate blend, and steam stripping the intimate blend, where melt kneading is conducted with a specific energy consumption of about 0.1 to about 0.3 kilowatt-hour per kilogram of blend. The method allows the formation of an intimate resin blend while minimizing the styrene monomer content of the final blend.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: January 1, 2008
    Assignee: General Electric Company
    Inventors: Geoffrey H. Riding, Katsuhisa Kumagai, Kim G. Balfour, Robert Hossan
  • Patent number: 7304124
    Abstract: A stripping process is provided which continuously strips volatile substances from a dispersion containing a polymer particles through stripping the volatile substances from a dispersion by blowing an inert gas into the dispersion to draw the volatile substances into the inert gas, removing the volatile substances from the gas mixture of the inert gas and the stripped volatile substances and circulating the purified inert gas obtained by removing the volatile substances from the gas mixture, and blowing the purified inert gas into the dispersion. Also provided is a production process for a toner which uses this stripping process.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: December 4, 2007
    Assignee: Zeon Corporation
    Inventors: Takeo Fujino, Kazuhiro Sato
  • Patent number: 7279244
    Abstract: The object of this invention is to provide a solid polymer electrolyte which is excellent in durability and of low cost, and membranes, solutions for electrode catalyst coating, membrane/electrode assemblies and fuel cells which use the electrolyte. According to this invention, there can be provided a fuel cell which comprises an electrode assembly having an electrode catalyst membrane formed therein, said catalyst membrane comprising a polymer electrolyte membrane held between an anode on one side of the principal plane of the electrolyte membrane and a cathode on the other side of the principal lane thereof, current collecting plates provided each independently in close contact, to the anode side and the cathode side of the electrode assembly, and electroconductive separators having gas supply passages to the anode and to the cathode provided on the outside surfaces of the current collecting plates.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: October 9, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Morishima, Tomoichi Kamo, Toshiyuki Kobayashi, Kenji Yamaga, Tohru Koyama
  • Patent number: 7259231
    Abstract: A method for the extraction, separation, fractionation and purification of biopolymers from plant materials using supercritical and/or subcritical solvent extractions is disclosed. Specifically, the process can be used for the separation of resins and rubber from guayule shrub (Parthenium argentatum), and other rubber and/or resin containing plant materials, using supercritical solvent extraction, for example supercritical carbon dioxide extraction. Additionally, polar and/or non-polar co-solvents can be used with supercritical carbon dioxide to enhance the selective extraction of resins and rubbers from the shrub.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: August 21, 2007
    Assignee: Yulex Corporation
    Inventors: Katrina Cornish, Jeffrey A. Martin, Rodger T. Marentis, Sebastian Plamthottam
  • Patent number: 7238773
    Abstract: Countercurrent stripping pipe for removing volatile organic constituents from reaction products, having a column pipe (201) composed of a plurality of pipe sections (201a-d), in which trays (202) are arranged, connections (205, 208) for supplying and removing the reaction products and connections (206, 207) for supplying and removing at least one stripping agent in countercurrent to the reaction products. In accordance with the invention, a plurality of successive trays (202) in each case are joined to one another and form at least two inserts (211a-c) which can be removed from the column pipe (201).
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: July 3, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Huebinger, Günter Staufer, Peter Keller
  • Patent number: 7226989
    Abstract: A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: June 5, 2007
    Assignee: General Electric Company
    Inventors: Norberto Silvi, Mark H. Giammattei, Paul W. Buckley
  • Patent number: 7135546
    Abstract: Process for recycling an article based on at least one vinyl chloride or vinylidene chloride polymer, according to which: (a) the article is cut up into fragments with a mean size of 1 cm to 50 cm in the case where it would exceed these sizes; (b) the article fragments are brought into contact with an azeotropic or quasiazeotropic mixture of water and of a solvent capable of dissolving the polymer, at a temperature of at least 120° C.; (c) the polymer dissolved in the solvent is precipitated by a reduction in pressure and by injection of steam into the solution thus obtained, which additionally results in the entrainment of the solvent-water azeotrope and thus leaves a mixture remaining which is essentially composed of water and of solid polymer particles; (d) the polymer particles are collected.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: November 14, 2006
    Assignee: Solvay (Societe Anonyme)
    Inventors: Bernard Vandenhende, Jean-Marie Yernaux
  • Patent number: 7124768
    Abstract: A method of transferring an aqueous polymer dispersion with a temperature ?50° C. from a vessel 1 via a connecting line to a vessel 2 is described.
    Type: Grant
    Filed: February 2, 2002
    Date of Patent: October 24, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl-Heinz Wassmer, Hardy Korb, Steffen Funkhauser, Martin Meister, Gerald Wildburg