Unsaturated Patents (Class 562/598)
  • Patent number: 7304176
    Abstract: It is an object of the present invention to provide a process for producing easily polymerizable substance, which can realize stable operation of a purification system, and can stably maintain a production amount by avoiding production stoppage, upon production of an easily polymerizable substance in plural reactors. The present invention is directed to a process for producing easily polymerizable substance, which comprises mixing easily polymerizable substances obtained in plural reactors in advance, and supplying the mixture to a purification apparatus.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: December 4, 2007
    Assignee: Nippon Shokubai Co., Ltd.
    Inventor: Takeshi Nishimura
  • Patent number: 7301052
    Abstract: The present invention provides a process for producing compounds useful as raw materials for various fluororesins in high yields in few steps from inexpensive and readily available starting materials. The following compound (1) and the following compound (2) are reacted to form the following compound (3), then the compound (3) is fluorinated in a liquid phase to form the following compound (4), and the ester bonds in the compound (4) are dissociated to form the compound (5), or the compound (5) and the compound (6). HOCH2-Q-O—(CH2)3—OH,??(1) CRBCOX,??(2) RBCOOCH2-Q-O—(CH2)3—OCORB,??(3) RBFCOOCF2-QF-O—(CF2)3—OCORBF,??(4) FCO-QF-O—(CF2)2—COF,??(5) RBFCOF.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: November 27, 2007
    Assignee: Asahi Glass Company, Linited
    Inventors: Shu-zhong Wang, Takashi Okazoe, Eisuke Murotani, Kunio Watanabe, Daisuke Shirakawa, Kazuya Oharu
  • Patent number: 7282584
    Abstract: Composition comprising a polymerizable compound with at least one conjugated unsaturated group and methylene blue to prevent premature polymerization of the polymerizable compound. The methylene blue is present in a concentration of 10 to 5000 ppm.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: October 16, 2007
    Assignee: Straumann Holding AG
    Inventor: Aaldert Molenberg
  • Patent number: 7268254
    Abstract: A process is proposed for partial oxidation oxidation in the gas phase of C3 and/or C4 precursor compounds to (meth)acrolein and/or (meth)acrylic acid in the presence of a heterogeneous particulate catalyst in a reactor having one or more cuboidal thermoplate modules (1) which are each formed from two or more rectangular thermoplates (2) arranged parallel to each other while in each case leaving a gap (3) which can be filled with the heterogeneous particulate catalyst and is flowed through by the fluid reaction mixture; the heat of reaction being absorbed by a heat carrier which flows through the thermoplates (2) and thus at least partly evaporating, and also having a predominantly cylindrical shell (4, 15, 16) which releases the pressure at the thermoplate modules, completely surrounds them and comprises a cylinder jacket (4) and hoods (15, 16) which seal it at both ends and whose longitudinal axis is aligned parallel to the plane of the thermoplates (2), and also having one or more sealing elements (7, 2
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: September 11, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Olbert, Claus Hechler
  • Patent number: 7241919
    Abstract: The storage tank of the invention for an easily polymerizable compound is a storage tank having an acceptance piping and a delivery piping and is characterized by having a circulation line which directly connects the acceptance piping to the delivery piping or having circulation lines which respectively connect the acceptance piping to the storage tank and the storage tank to the delivery piping; the method of storing of the invention is characterized by storing an easily polymerizable compound in the storage tank while circulating the compound in the storage tank through the circulation line(s); the method of pipe jointing and apparatus therefor of the invention are a method of jointing pipes fitted to a handling apparatus in a production apparatus, storage apparatus, or the like for the purpose of transporting a corrosive liquid, the method being characterized in that the pipes are jointed with flanges, bolts, and nuts made of a material having resistance to corrosion by the corrosive liquid; the process fo
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: July 10, 2007
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shuhei Yada, Yasushi Ogawa, Yoshiro Suzuki, Kimikatsu Jinno, Hirochika Hosaka, Masayasu Goriki
  • Patent number: 7220879
    Abstract: This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: May 22, 2007
    Assignee: Rohm and Haas Company
    Inventors: Stephen Bass, Robert Michael Mason, Joy Lyndon Mendoza, Steven John Skoog, Mark T. Vandersall
  • Patent number: 7205429
    Abstract: This invention is providing a method for efficient treatment of the waste material from a process for production of acrylic acid and an acrylic ester. This is a method for the disposal of waste material, which at least one waste material selected from the group consisting of waste oil, waste water, and waste gas emitted from a process for production of acrylic acid is/are purified with at least one waste material selected from the group consisting of waste oil, waste water, and waste gas emitted from a process for production of an acrylic ester jointly. The efficiency of the treatment is enhanced by simultaneously treating the waste material.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: April 17, 2007
    Assignee: Nippon Shokubai Co., Ltd
    Inventors: Yukihiro Matsumoto, Takeshi Nishimura, Kenji Sanada, Harunori Hirao
  • Patent number: 7183427
    Abstract: A method for manufacturing metal salts of radical-polymerizable compounds with reduced amount of water in the below-mentioned component (A) by subjecting an aqueous solution of an alkali-metal salt, alkali earth-metal salt, or a zinc salt of the radical-polymerizable compound (A) to heating under a reduced pressure in the presence of an aqueous polymerization inhibitor for removal of aqueous components by distillation from aforementioned compounds (A).
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: February 27, 2007
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventor: Keiji Wakita
  • Patent number: 7179875
    Abstract: In a process for preparing water-absorbent resins based on acrylic acid, crude acrylic acid is firstly isolated from the reaction gases from the catalytic gas-phase oxidation of propane, propylene and/or acrolein. This is treated with an aldehyde scavenger and pure acrylic acid is separated by distillation from the treated crude acrylic acid, and this pure acrylic acid can be subjected directly to a free-radical polymerization.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: February 20, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Fuchs, Hans Martan, Gerhard Nestler, Klaus Joachim Mueller-Engel
  • Patent number: 7173149
    Abstract: A process for preparing alkynecarboxylic acids includes the oxidation of an alkyne alcohol with a hypohalite in the presence of a nitroxyl compound at a pH of greater than 7 with continual addition of the alkyne alcohol and of the hypohalite to the reaction mixture.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: February 6, 2007
    Assignee: Consortium für elektrochemische Industrie GmbH
    Inventors: Jürgen Stohrer, Elke Fritz-Langhals, Christian Brüninghaus
  • Patent number: 7157599
    Abstract: There is disclosed a method of producing ?,?-unsaturated carboxylic acid of formula (3) wherein R1 denotes a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkenyl group or an alkynyl group, which method comprises reacting a carboxylic acid of formula (1) wherein R1 denotes the same as the above, or carboxylic anhydride of formula (2) wherein R1 denotes the same as the above, with a methylenating agent in a presence of a catalyst containing metal of Group 13 of the Periodic Table of Elements in the amount of not more than 5 weight %.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: January 2, 2007
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Fumisato Goto, Hirotada Kakiya
  • Patent number: 7157598
    Abstract: A process prepares an aqueous alkali metal acrylate solution by distillatively removing acrylic acid from a mixture as vapors and taking up the vapors immediately from the gas phase into an aqueous alkali solution.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: January 2, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Fuchs, Hans Martan, Klaus Joachim Mueller-Engel
  • Patent number: 7135594
    Abstract: There is provided a method for preventing clogging in an apparatus for handling (meth)acrylic acid or esters thereof which is capable of inhibiting occurrence of clogging in nozzles or conduits connected to a gas-phase portion of the apparatus and ensuring a stable continuous operation of the apparatus for a long period of time. The method for preventing clogging in an apparatus for handling (meth)acrylic acid or esters thereof, comprises blowing a gas having a polymerization inhibiting action into a nozzle or conduit connected to a gas-phase portion of the apparatus, wherein said gas having a polymerization inhibiting action, which is blown into the nozzle or conduit, has a temperature not less than a temperature of the gas-phase portion.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: November 14, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shuhei Yada, Yasushi Ogawa, Kenji Takasaki, Yoshiro Suzuki
  • Patent number: 7112695
    Abstract: In a process for the purification of a crude acrylic acid melt, the crude acrylic acid melt is converted, under the action of low temperatures, into a crude acrylic acid suspension consisting of acrylic acid crystals and residual melt, and the acrylic acid crystals of the crude acrylic acid suspension are freed from remaining residual melt in a wash column, the production of the acrylic acid crystals of the crude acrylic acid suspension being carried out in the presence of water, the wash column being a wash column with forced transport of the acrylic acid crystals and the wash liquid used being the melt of acrylic acid crystals purified in the wash column.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: September 26, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Eck, Dieter Baumann, Jörg Heilek, Klaus Joachim Müller-Engel
  • Patent number: 7109328
    Abstract: A process for the fractional condensation of a hot gas mixture which as well as acrylic acid contains at least one further condensable component in a column in the presence of at least one stabilizer comprises metering in at least a portion of the at least one stabilizer as a melt.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: September 19, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Hammon, Juergen Schroeder
  • Patent number: 7094921
    Abstract: There is provided a method for storing (meth)acrylic acid or (meth)acrylic esters in a storage tank for receiving or discharging the (meth)acrylic acid or (meth)acrylic esters, which is capable of storing the (meth)acrylic acid or (meth)acrylic esters for a long period of time. According to the method of the present invention, upon storing the (meth)acrylic acid or (meth)acrylic esters in the storage tank for receiving or discharging the (meth)acrylic acid or (meth)acrylic esters, a concentration of suspended particulate matters contained in a gas phase portion of the storage tank is controlled to not more than 0.01 mg/m3.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: August 22, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shuhei Yada, Kenji Takasaki, Yoshiro Suzuki, Yasushi Ogawa
  • Patent number: 7091377
    Abstract: A multimetal oxide material contains the elements Mo, V and Te and/or Sb and at least one of the elements Nb, Ti, W, Ta and Ce and promoters and has a specific X-ray diffraction pattern. Moreover, such a multimetal oxide material is used as a catalyst for heterogeneously catalyzed gas-phase partial oxidations of hydrocarbons.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: August 15, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Frieder Borgmeier, Martin Dieterle, Hartmut Hibst
  • Patent number: 7038082
    Abstract: A process for preparing a multimetal oxide material which contains the elements Mo, V and Te and/or Sb and at least one of the elements Nb, Ti, W, Ta and Ce and if desired promoters and has a specific X-ray diffraction pattern, in which process the last process step comprises washing with acidic liquids. In addition, a multimetal oxide material obtainable in such a way is used as a catalyst for heterogeneously catalyzed gas-phase partial oxidations and/or ammoxidation of hydrocarbons.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: May 2, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Frieder Borgmeier, Klaus Joachim Müller-Engel, Hartmut Hibst, Martin Dieterle
  • Patent number: 7038079
    Abstract: A method is disclosed which produces acrylic acid in a high yield as maintaining the conditions for purifying acrylic acid in constant ranges and preventing the acrylic acid from polymerization. By using a reactor which has first reaction zone and second reaction zone formed of different reaction tubes, propylene concentration adjusting in the range of 7–15 vol. % and water concentration adjusting in the range of 0–10 vol. % are introduced thereto thereby obtaining an acrylic acid-containing gas. Then the gas is introduced to an acrylic acid absorption column to adjust water concentration in the range of 1–45 wt. %, thereby preventing from polymerization.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: May 2, 2006
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Harunori Hirao, Michio Tanimoto
  • Patent number: 7026506
    Abstract: In a process for the preparation of acrylic acid by heterogeneously catalyzed gas-phase oxidation of propene with molecular oxygen in a reaction zone, the catalytically active material is a multimetal oxide which contains the elements Mo, V, Te and/or Sb and has a specific structure.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: April 11, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Frieder Borgmeier, Jochen Petzoldt, Hartmut Hibst, Andreas Tenten
  • Patent number: 7019168
    Abstract: In a process for partially oxidizing propene to acrylic acid in the gas phase under heterogeneous catalysis, a starting reaction gas mixture comprising propene and oxygen and having a specific composition is oxidized in a first reaction stage over a first fixed catalyst bed having a volume-specific activity which is constant or increases in the flow direction and the acrolein-containing product gas mixture of the first reaction stage is subsequently oxidized in a second reaction stage over a second fixed catalyst bed having a volume-specific activity increasing in the flow direction, and the shaped catalyst bodies of both fixed catalyst beds are annular and each have a specific multimetal oxide composition.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: March 28, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Dieterle, Jochen Petzoldt, Klaus Joachim Müller-Engel, Hans Martan
  • Patent number: 7015357
    Abstract: In the purification and distillation step of acrylic acid (including (meth)acrylic acid), stable continuous operation for a long period is enabled by inhibiting the undesirable polymerization reaction of acrylic acid thereby to prevent the device from a trouble such as clogging.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: March 21, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shuhei Yada, Kenji Takasaki, Yasushi Ogawa, Yoshiro Suzuki
  • Patent number: 7009075
    Abstract: The invention disclosed is a process for the selective conversion of an alkane to an unsaturated carboxylic acid in a one-step process with a mixed metal oxide catalyst composition having the general formula: MoVaNbbTecSbdMeOx wherein M is optional and may be one or more selected from silver, silicon, sulfur, zirconium, titanium, aluminum, copper, lithium, sodium, potassium, rubidium, cesium, gallium, phosphorus, iron, rhenium, cobalt, chromium, manganese, arsenic, indium, thallium, bismuth, germanium, tin, cerium or lanthanum. This catalyst may be prepared by co-precipitation of metal compounds which are calcined to form a mixed metal oxide catalyst.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: March 7, 2006
    Assignee: Saudi Basic Industries Corporation
    Inventor: Paulette N. Hazin
  • Patent number: 7005544
    Abstract: A method for effectively preventing polymerization of acrylic acid during an azeotropic dehydration distillation in an acrylic acid manufacturing process and thus enabling stable operation of the azeotropic dehydration column over an extended period of time. The acrylic acid is separated in an azeotropic dehydration column from an acrylic acid aqueous solution fed therein, and the method includes withdrawing from the bottom of the azeotropie dehydration column a bottom effluent containing 50% or more of glyoxal (including the hydrates thereof) contained in the acrylic acid aqueous solution fed into the azeotropic dehydration column.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: February 28, 2006
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kazuo Ohkouchi, Tomohiro Nakae, Kazuhiko Sakamoto
  • Patent number: 7005087
    Abstract: A composition comprising aminoalkyl imidazoline or alkyl-substituted succinimide antifoulants or mixtures thereof, and use of aminoalkyl imidazolines and alkyl-substituted succinimides to prevent fouling in (meth)acrylic acid manufacturing processes and processes in which (meth)acrylic acid is used in a reaction and where unreacted (meth)acrylic acid is recovered.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: February 28, 2006
    Assignee: Nalco Energy Services, L.P.
    Inventor: David Youdong Tong
  • Patent number: 6989463
    Abstract: There is provided a method for handling high-viscosity substances discharged from a production process of acrylic acid or esters thereof by gas-phase catalytic oxidation, which method is improved such that upon transporting the high-viscosity substances in a molten state to a storage tank through a pipeline, the retention or clogging of the high-viscosity substances in the pipeline can be effectively prevented without adding a solvent thereto, resulting in smooth transportation thereof through the pipeline.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: January 24, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Shuhei Yada, Yasushi Ogawa, Kenji Takasaki, Yoshiro Suzuki
  • Patent number: 6987154
    Abstract: This invention relates generally to synthetic procedures that include the step of ring-opening metathesis of cyclic olefins and reaction with an acyclic diene co-reactant to produce regularly repeating A,B-alternating olefin polymers. The A,B-alternating polymers are produced by varying reaction conditions and/or reactant proportions and using only two types of olefin metathesis (ring-opening and cross) to provide regularly repeating ABAB . . . etc. polymers via ring-opening metathesis polymerization (ROMP). More particularly, the invention pertains to synthesis of A,B-alternating olefin polymers via olefin metathesis reactions using a Group 8 transition metal complex as the metathesis catalyst. Polymers provided herein have utility in a variety of fields, including not only polymer chemistry per se, but also in the pharmaceutical, biomedical, and packaging industries where the structure and properties of polymers need to be tightly controlled.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: January 17, 2006
    Assignee: California Institute of Technology
    Inventors: Tae-Lim Choi, Choon Woo Lee, Isaac M. Rutenberg, Robert H. Grubbs
  • Patent number: 6969774
    Abstract: In a method for synthesizing methacrylic acid by using a fixed bed tube type reactor provided with a catalyst bed into which a solid oxidation catalyst is filled and with a heat medium bath and by flowing a raw material gas containing methacrolein and oxygen through the catalyst bed, the catalyst bed does not have any sections in which a temperature difference between the heat medium bath and the catalyst bed (?T) exceeds 35° C., and two or more high temperature zones in which each ?T is 15 to 35° C. are provided. According to this method, mathacrylic acid can be manufactured in higher yields.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: November 29, 2005
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Seigo Watanabe, Motomu Oh-Kita
  • Patent number: 6958414
    Abstract: Organic compounds are prepared by heterogeneously catalyzed partial gas-phase oxidation of precursor compounds by a process in which a portion of the reaction gas starting mixture is brought from a low initial pressure to a higher final pressure by means of a radial compressor.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: October 25, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Schliephake, Ulrich Hammon, Ernst Lang, Carl-Ludwig Krüger, Jürgen Schröder, Klaus Joachim Müller-Engel
  • Patent number: 6946573
    Abstract: A method for quickly starting up a reactor and a reactor system therefor are provided. A shell-and-tube reactor in the system is adapted to circulate a heat medium having a solid point in the range of 50-250° C. to the outside of the reaction tubes and characterized by initiating temperature elevation of the reactor by introducing a gas of a temperature in the range of 100-400° C. to the reaction tubes' side and then circulating the heat medium in a heated state to the outside of the reaction tubes. By introducing a gas of an elevated temperature preparatorily to the reaction tubes, it is made possible to prevent the heat medium after circulation from being solidified again and enable the reactor to be quickly started up.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: September 20, 2005
    Assignee: Nippon Shokaubai Co., Ltd.
    Inventors: Yukihiro Matsumoto, Takeshi Nishimura, Hideki Sogabe, Kazuhiko Sakamoto, Osamu Dodo
  • Patent number: 6946574
    Abstract: The present invention relates to a process for the preparation of ?- or ?-unsaturated or saturated carboxylic acids. It relates more particularly to the hydroxycarbonylation of an organic compound comprising a conjugated unsaturation, such as butadiene, by the action of carbon monoxide and water in the presence of a palladium-based catalyst. The carboxylic acids thus obtained are preferably pentenoic acids. According to the invention, the reaction medium after the end of the hydroxycarbonylation stage is treated with hydrogen to reduce the palladium present in the 2+ oxidation state to palladium in the zero oxidation state and the precipitated palladium is recovered.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: September 20, 2005
    Assignee: Rhodia Polyamide Intermediates
    Inventors: Jean-Pierre Simonato, Pascal Metivier
  • Patent number: 6930201
    Abstract: In a method of producing methacrylic acid by passing a material gas containing methacrolein, oxygen and water vapor through a reactor packed with a catalyst containing as the main component a compound oxide containing molybdenum and phosphorus, a concentration of methacrolein in the material gas is controlled in a range of 4 to 6.5 vol %, a molar ratio of the water vapor to the methacrolein in the material gas is controlled in a range of 1 to 2, and a space velocity of the material gas to the catalyst-packed layer is controlled in a range of 500 to 750 h?1, whereby deterioration of the catalyst is effectively inhibited.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: August 16, 2005
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Seigo Watanabe, Motomu Oh-Kita
  • Patent number: 6921837
    Abstract: Acrylic acid or methacrylic acid is purified by crystallization to obtain crystals and a mother liquor, by a process in which the crystals are washed with a wash liquid containing the acid and having a temperature from 15 to 40° C. Furthermore, a process for the preparation of acrylic acid or methacrylic acid comprises the abovementioned purification process.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: July 26, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Eck, Jörg Heilek, Dieter Baumann, Volker Schliephake
  • Patent number: 6888026
    Abstract: An object of this invention is to provide a method for producing acrylic acid that enables to suppress adverse influence of byproducts during distillation and to accomplish long-term continuous operation of the acrylic acid production apparatus. This invention is directed to a method for producing (meth)acrylic acid comprising the step of isolating (meth)acrylic acid from a liquid containing (meth)acrylic acid by distillation wherein the liquid contains glyoxal (including its hydrate) in a concentration of 0.1 mass % or less.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: May 3, 2005
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kazuhiko Sakamoto, Kazuo Ohkouchi, Tomohiro Nakae
  • Patent number: 6870066
    Abstract: A method for the decomposition of a Michael type adduct of an acrylic acid and/or an acrylic ester represented by the following formula [I] or [II] is disclosed, wherein decomposing the Michael type adduct in the presence of at least one copper salt and at least one metal salt selected from the group consisting of an alkali metal salt and an alkaline earth metal salt into an acrylic acid and/or an acrylic ester and/or an alcohol. CH2?CHCOO(—X—COO)n—R1??[I] R2—O(—X—COO)m—R3??[II] (wherein n and m denote an integer in the range of 1-5, R1, R2, and R3 independently denote a hydrogen atom or an alkyl group, and —X— denotes —CH2CH2— or —CH(CH3)—, and —X— may be identical or different when n is 2 or more).
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: March 22, 2005
    Assignee: Nippon Shokubai Co., LTD
    Inventors: Fumio Shibusawa, Naoki Serata, Kazuhiko Sakamoto
  • Patent number: 6867328
    Abstract: The invention relates to a method for producing acrylic acid by the heterogeneously catalysed gas-phase oxidation of propane on a multi-metal oxide mass, said mass containing the elements Mo, V, Te and/or Sb and having a specific X-ray diffractogram.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: March 15, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Frieder Borgmeier, Andreas Tenten, Hartmut Hibst, Klaus Joachim Müller-Engel, Signe Unverricht, Gerhard Cox
  • Patent number: 6858750
    Abstract: The present invention relates to the use of individual fumaric acid derivatives or mixtures thereof for preparing a pharmaceutical composition for treating mitochondrial diseases, especially for treating Parkinson's syndrome, Alzheimer's disease, Chorea Huntington disease, retinopathia pigmentosa and mitochondrial encephalomyopathy. Preferably, the fumaric acid derivative(s) is/are those selected from the group consisting of fumaric acid dialkyl esters or fumaric acid monoalkyl esters in the form of the free acid or a salt thereof.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: February 22, 2005
    Assignee: Fumapharm AG
    Inventors: Rajendra Kumar Joshi, Hans-Peter Strebel
  • Patent number: 6794534
    Abstract: The invention is directed to the cross-metathesis and ring-closing metathesis reactions between geminal disubstituted olefins and terminal olefins, wherein the reaction employs a Ruthenium or Osmium metal carbene complex. Specifically, the invention relates to the synthesis of &agr;-functionalized or unfunctionalized olefins via intermolecular cross-metathesis and intramolecular ring-closing metathesis using a ruthenium alkylidene complex. The catalysts preferably used in the invention are of the general formula wherein: M is ruthenium or osmium; X and X1 are each independently an anionic ligand; L is a neutral electron donor ligand; and, R, R1R6, R7, R8, and R9 are each independently hydrogen or a substituent selected from the group consisting of C1-C20 alkyl, C2-C20 alkenyl, C2-C20 alkynyl, aryl, C1-C20 carboxylate, C1-C20 alkoxy, C2-C20 alkenyloxy, C2-C20 alkynyloxy, aryloxy, C2-C20 alkoxycarbonyl, C1-C20 alkylthio, C1-C20 alkylsulfonyl and C1-C20 alkylsulfinyl.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: September 21, 2004
    Assignee: California Institute of Technology
    Inventors: Robert H. Grubbs, Arnab K. Chatterjee, John P. Morgan, Matthias Scholl, Tae-Lim Choi
  • Patent number: 6794540
    Abstract: A process for the preparation of sorbic acid by thermal cleavage of the polyester prepared from crotonaldehyde and ketene, in the presence of a solvent and of an amine as catalyst with simultaneous distillation out of the sorbic acid formed and of the solvent through a rectification column with reflux, wherein only the solvent rather than the distillate is used as reflux, leads to high yields of sorbic acid and to a reduced consumption of amine catalyst.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: September 21, 2004
    Assignee: Nutrinova Nutrition Specialties & Food Ingredients GmbH
    Inventor: Christoph Mollenkopf
  • Patent number: 6790987
    Abstract: The present invention relates to a process of cleaving lactones optionally having functional groups to give carboxylic acids, where the corresponding lactone is reacted with hydrogen with catalysis by a compound of a metal of group VIII of the Periodic Table of the Elements which has been modified with organophosphines. The process is preferably carried out in a two-phase system using catalysts which have water-soluble phosphine ligands. The reaction is particularly suitable for cleavage 2-ethylidene-6-hepten-5-olide to give ethylidene-6-heptenecarboxylic acid or isomers thereof. This carboxylic acid can be hydrogenated in a manner known per se to give 2-ethylheptanoic acid.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: September 14, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Arno Behr, Volker Brehme
  • Patent number: 6740779
    Abstract: In a process for the two-stage catalytic gas-phase oxidation of propene to acrylic acid, the reaction gas starting mixture is passed, in a tube-bundle reactor, with a propene loading of ≧160 l (S.T.P.) of propene/l·h, first over a fixed catalyst bed 1 present in two successive temperature zones A, B and then over a fixed catalyst bed 2 which is housed either in one further temperature zone C or in two further temperature zones D, E, the temperature of the zone A being kept at a lower temperature than the zone B and the temperature of the zone D at a lower temperature than the zone E.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: May 25, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Tenten, Hartmut Hibst, Otto Machhammer, Claus Hechler, Klaus Joachim Müller-Engel, Signe Unverricht
  • Patent number: 6727383
    Abstract: A process for preparing acrylic acid and/or acrylates which comprises the following stage A and, if desired, B and C: A: cooling a gaseous reaction mixture which comprises acrylic acid and is obtained in the gas-phase oxidation to prepare acrylic acid, using oligomeric acrylic acid or a mixture of acrylic acid and oligomeric acrylic acid, to give a gaseous mixture comprising acrylic acid and a quench bottom product which comprises oligomeric acrylic acid; B: separating the gaseous mixture comprising acrylic acid, to give a low-boiling fraction, a crude acrylic acid, and a bottom product, which comprises oligomeric acrylic acid; C: esterifying the crude acrylic acid obtained in stage B by means of one or more alkanols.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: April 27, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Nestler, Jürgen Schröder, Otto Machhammer
  • Patent number: 6693216
    Abstract: The present invention relates to calcium double salts having good preservative properties. Said salts can be used in foods, feeds, pet food, cosmetics and pharmaceuticals, food-contact items, silage, brewers' spent grains, pomace, food wastes, brewers' yeast, distillation residues and other wastes from the food industry or for leather treatment. These substances exhibit a considerably extended shelf life after addition of, or treatment with, one of the calcium double salts.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: February 17, 2004
    Assignee: Nutrinova Nutrition Specialties & Food Ingredients GmbH
    Inventors: Nico N. Raczek, Christoph Mollenkopf
  • Patent number: 6686144
    Abstract: Polyampholytes including fibronectin and aggrecan are made to aggregate and form fibrillar lattice networks environment free of cells, extraneous proteins and other materials which may be present in an extracellular matrix. A composition having sufficient charge density is utilized to cause aggregation and self-assembly of such polyampholytes and to provide an assay for determining the effects of environmental agents on such aggregation and self-assembly.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: February 3, 2004
    Assignee: The Research Foundation of the State University of New York
    Inventors: Kenneth J. McLeod, Nadine Pernodet, Miriam Rafailovich
  • Publication number: 20040006244
    Abstract: The present invention relates to production of ethylenically unsaturated acids and ethylenically unsaturated esters by the catalytic reaction of an alkanoic acid or an alkanoic ester, with formaldehyde, in presence of a basic catalyst and optionally in the presence of an alcohol. More specifically, this invention relates to production of methyl methacrylate, an ester, by reaction of methyl propionate with formaldehyde, in presence of a basic catalyst, for example, cesium acetate on silica. This invention discloses a process for obtaining a high conversion of ethylenically unsaturated acids and esters.
    Type: Application
    Filed: May 14, 2003
    Publication date: January 8, 2004
    Inventor: Leo Ernest Manzer
  • Patent number: 6664418
    Abstract: A method for inhibiting polymerization during transportation, storage and/or production of (meth)acrylic acid or an ester thereof includes adding an N-oxyl compound and water to a vinyl compound; or dissolving an N-oxyl compound in water and adding the solution to a vinyl compound in a process of recovering, purifying, and/or synthesizing of the vinyl compound. The method can effectively inhibit polymerization of the vinyl compound.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: December 16, 2003
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kazuhiko Sakamoto, Kazuo Ohkouchi, Masahiro Uemura, Sei Nakahara, Masatoshi Ueoka
  • Patent number: 6652820
    Abstract: A method of making a cesium salt is described and involves reacting a cesium sulfate containing solution with lime to form 1) a solution containing at least cesium hydroxide and 2) a residue comprising calcium sulfate. The method further involves removing the residue from the solution and converting the cesium hydroxide that is present in the solution to at least one type of cesium salt. The present invention further relates to uses of the cesium salt as well as methods of making cesium hydroxide using lime. Also, methods of making alkali metal salts and alkali metal hydroxides are also described.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 25, 2003
    Assignee: Cabot Corporation
    Inventor: Bart F. Bakke
  • Patent number: 6651731
    Abstract: For a heat exchanger using a heating medium for the purpose of heating a fluid to be handled during a steady state, this invention provides a method for using relevant devices which enables the heat exchanger to be operated safely and infallibly without suffering the raw material or the reaction product to polymerize in the reactor or the pipes during an unsteady state, suffering the reactor or the pipes to sustain a fracture owing to a rise in the internal pressure of the vessel, and suffering the apparatus for production to sustain serious damage. This invention pertains, mainly in a heat exchanger admitting a heating medium and using it for the purpose of heating a fluid to be handled, to a method for using relevant devices during the unsteady state, characterized by introducing a cooling medium in the place of the heating medium mentioned above.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: November 25, 2003
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Takeshi Nishimura, Yukihiro Matsumoto, Sei Nakahara, Motomi Nakamura
  • Publication number: 20030208093
    Abstract: Provided herein are improved methods for producing methacrylic acid and methacrylate esters using combined or “integrated” processing steps including integrated hydrolysis, integrated cracking systems, and combinations thereof. In one embodiment, other aspects of an methacrylic acid and methacrylate ester production trains are integrated. Also provided are methods to purify crude methacrylic acid streams to form glacial methacrylic acid that is at least 95% pure.
    Type: Application
    Filed: April 22, 2003
    Publication date: November 6, 2003
    Inventors: Curtis Ingstad Carlson, Michael Stanley DeCourcy, Jamie Jerrick John Juliette
  • Patent number: 6642414
    Abstract: A method for producing (meth)acrylic acid of high purity by repressing formation of a polymer possibly generated during the course of production is disclosed. The production is accomplished by returning the waste liquid generated at the step of the addition of aldehyde treating agents (d) to the step of the absorption (b) and/or the step of separation (c).
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: November 4, 2003
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Tetsuji Mitsumoto, Yukihiro Matsumoto, Sei Nakahara, Tatsuaki Yoshimura