Additive(s) Aromatic Patents (Class 585/5)
  • Patent number: 9228126
    Abstract: The present invention relates to an improved additive composition for control and inhibition of polymerization of aromatic vinyl monomers including styrene comprising one or more of aromatic nitro compounds and one or more of aliphatic tertiary amines. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers including styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: January 5, 2016
    Assignee: Dorf Ketal Chemicals (India) Private Limited
    Inventor: Mahesh Subramaniyam
  • Patent number: 9017429
    Abstract: Use in a gas oil fuel composition, which preferably comprises a Fischer-Tropsch derived fuel, of a compound according to formula (I): wherein: R1 to R4 are each independently hydrogen or a C1-10 alkyl group, where such alkyl groups may be the same as or different from one another; and X is a nitrogen- or oxygen-containing group, for the purpose of reducing the cetane number of said fuel composition; preparation of such a fuel composition; and operating a fuel consuming system.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: April 28, 2015
    Assignee: Shell Oil Company
    Inventors: Claire Griffiths, Richard Hugh Clark, Christopher William Clayton, Paul Anthony Stevenson, Robert Wilfred Matthews Wardle
  • Publication number: 20140371495
    Abstract: The invention relates to a method of inhibiting corrosion by corrosive fluids, and more specifically to inhibiting corrosion of a metallic surface. The method comprising adding to the corrosive fluid a specifically selected ionic liquid which is added in an amount, based on the total weight of the corrosive fluid, effective to mitigate or alleviate corrosion.
    Type: Application
    Filed: November 23, 2012
    Publication date: December 18, 2014
    Inventors: Kris Anderson, Peter Goodrich, Christopher Hardacre, Azlan Hussain, David Rooney
  • Publication number: 20140364662
    Abstract: The present invention relates to an improved amine based additive composition for control and inhibition of polymerization of aromatic vinyl monomers including styrene comprising one or more of the quinone methide or derivatives thereof, one or more of nitroxide compounds and further comprising one or more of aliphatic tertiary amines. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers, particularly of styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 11, 2014
    Applicant: DORF KETAL CHEMICALS (INDIA) PRIVATE LIMITED
    Inventor: Mahesh Subramaniyam
  • Publication number: 20140350313
    Abstract: The present invention relates to an improved additive composition for control and inhibition of polymerization of aromatic vinyl monomers including styrene comprising one or more of aromatic nitro compounds and one or more of aliphatic tertiary amines. In one embodiment, the present invention also relates to method of use of presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers including styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Application
    Filed: December 3, 2012
    Publication date: November 27, 2014
    Applicant: DORF KETAL CHEMICALS (INDIA) PRIVATE LIMITED
    Inventor: Mahesh Subramaniyam
  • Publication number: 20140316172
    Abstract: The present invention relates to amine based additive composition for controlling and inhibition of polymerization of aromatic vinyl monomers including styrene comprising (a) one or more of nitroxide (i.e. nitroxyl) compounds; and (b) one or more of aromatic nitro compounds, characterized in that the said composition further comprises one or more of (c) amines, wherein said amine is selected from a group comprising (i) hydroxyl alkyl tertiary amines, (ii) tertiary alkyl amines, (iii) hydroxyl alkyl primary amine; and (iv) mixture thereof. In one embodiment, the present invention also relates to method of using presently provided composition. In another embodiment, the present invention also relates to method of controlling and inhibiting polymerization of aromatic vinyl monomers including styrene by employing presently provided composition. In still another embodiment, the present invention also relates to method of preparation of presently provided composition.
    Type: Application
    Filed: November 16, 2012
    Publication date: October 23, 2014
    Applicant: DORF KETAL CHEMICALS (INDIA) PRIVATE LIMITED
    Inventor: Mahesh Subramaniyam
  • Publication number: 20140309466
    Abstract: The invention relates to a method of forming an olefin from a first olefin and a second olefin in a metathesis reaction, comprising step (i): (i) reacting the first olefin with the second olefin in the presence of a compound that catalyzes said metathesis reaction such that the molar ratio of said compound to the first or the second olefin is from 1:500 or less, and the conversion of the first or the second olefin to said olefin is at least 50%, characterized in that as compound that catalyzes said metathesis reaction a compound of the following formula is used: wherein M is Mo or W; R1 is aryl, heteroaryl, alkyl, or heteroalkyl; optionally substituted; R2 and R3 can be the same or different and are hydrogen, alkyl, alkenyl, heteroalkyl, heteroalkenyl, aryl, or heteroaryl; optionally substituted; R5 is alkyl, alkoxy, heteroalkyl, aryl, heteroaryl, silylalkyl, silyloxy, optionally substituted; and R4 is a residue R6—X—, wherein X?O and R6 is aryl, optionally substituted; or X?S and R6 is aryl, opt
    Type: Application
    Filed: March 13, 2014
    Publication date: October 16, 2014
    Inventors: Levente Ondi, Jeno Varga, Agota Bucsai, Florian Toth, Krisztian Lorincz, Csaba Hegedus, Emmanuel Robbe, Georg Emil Frater
  • Publication number: 20140243564
    Abstract: Fouling in basic washing systems such as caustic scrubbers can be prevented or at least mitigated by treating the liquid washing phase used in a caustic scrubber with an additive having at least one compound selected from the group consisting of oxalyl dihydrazide, a disulfite salt, isopropyl hydroxylamine, chlorobenzhydrazide, aminobenzhydrazide, a thiosulfate salt, 4,4-dimethyl oxazolidine, a hydrosulfite salt, and mixtures thereof, particularly in the case where the liquid washing phase includes components that may undergo an aldol condensation, the products of which may cause fouling solids and/or sludges.
    Type: Application
    Filed: May 8, 2014
    Publication date: August 28, 2014
    Applicant: Baker Hughes Incorporated
    Inventors: Zhenning Gu, Joseph L. Stark, Roger D. Metzler
  • Publication number: 20140200375
    Abstract: The present invention relates to additive composition for control and inhibition of polymerization of styrene, wherein the composition comprises amine and quinone methide, and wherein the amine is polymerization non-inhibitor amine. In one embodiment, the present invention relates to method of preparation and use of additive composition to control and inhibit polymerization of styrene, wherein the composition comprises amine and quinone methide, and wherein the amine is polymerization non-inhibitor amine. In another embodiment, the present invention relates to additive composition for control and inhibition of polymerization of styrene, wherein the composition comprises oxide treated derivative of amine and quinone methide, and wherein the amine is polymerization non-inhibitor amine, and to the method of preparation and use thereof.
    Type: Application
    Filed: August 17, 2012
    Publication date: July 17, 2014
    Applicant: DORF KETAL CHEMICALS (INDIA) PRIVATE LIMITED
    Inventor: Mahesh Subramaniyam
  • Publication number: 20130210157
    Abstract: Disclosed herein are mixed metal-organic frameworks, Zn3(BDC)3[Cu(SalPycy)] and Zn3(CDC)3[Cu(SalPycy)], wherein BDC is 1,4-benzenedicarboxylate, CDC is 1,4-cyclohexanedicarboxylate, and SalPyCy is a ligand of the formula: These are useful for applications such as selective gas storage, selective molecular separations, and selective detection of molecules, including enantioselective applications thereof.
    Type: Application
    Filed: January 17, 2013
    Publication date: August 15, 2013
    Applicant: The Board of Regents of the University of Texas System
    Inventor: The Board of Regents of the University of Texas System
  • Publication number: 20130116486
    Abstract: The invention relates to a retarder composition for the control of unwanted polymerisation reactions during the production and processing of ethylenically unsaturated compounds, the composition comprising at least one di-substituted quinone compound and at least one hydroxylamine compound. Optionally, the composition also comprises at least one stable free radical nitroxyl compound and one or more formulation adjuvants. The invention also envisages a process stream comprising at least one ethylenically unsaturated compound, and a method for the prevention of unwanted polymerisation reactions during the production and processing of ethylenically unsaturated compounds. The composition has been found to be far more effective than expected, given that the individual components show little or no efficacy when used alone, and poses much less hazard to humans than the compositions of the prior art.
    Type: Application
    Filed: July 8, 2011
    Publication date: May 9, 2013
    Applicant: NUFARM UK LIMITED
    Inventors: Colin Loyns, Andrew Nigel Fawbert, Angela Jane Glossop, Peter Mark Price
  • Publication number: 20130030225
    Abstract: Methods and compositions are provided for inhibiting the polymerization of a vinyl aromatic monomer, such as styrene monomer, during elevated temperature processing thereof or during storage or shipment of polymer containing product. The compositions comprise a combination of a quinone methide derivative A) and a phenol compound B). The methods comprise adding from about 1-10,000 ppm of the combination to the monomer containing medium, per one million parts of the monomer.
    Type: Application
    Filed: September 27, 2012
    Publication date: January 31, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: GENERAL ELECTRIC COMPANY
  • Publication number: 20120310022
    Abstract: The present invention relates to a composition and method for inhibiting the formation of naphthenate solids in a liquid hydrocarbon. The method includes contacting a composition including a rosin amine having a formula (I): or (II): where formula (AA): represents a single or double bond; R1, R2 and R5 each independently represent H, alkyl, alkenyl or an alkynyl group each having between one and ten carbon atoms, —(R3O)nR4 wherein R3 is an alkyl group having 1 to 3 carbon atoms and R4 is H, alkyl, alkenyl or an alkynyl group each having between one and ten carbon atoms; n is an integer between 5 and 50; X is a halide, sulphate, phosphate or acetate ion; and a demulsifier intermediate with the liquid hydrocarbon.
    Type: Application
    Filed: November 25, 2010
    Publication date: December 6, 2012
    Inventors: Chandrashekhar Khandekar, Suguna Gopal, James Smith
  • Patent number: 8298440
    Abstract: Methods and compositions are provided for inhibiting the polymerization of a vinyl aromatic monomer, such as styrene monomer, during elevated temperature processing thereof or during storage or shipment of polymer containing product. The compositions comprise a combination of a quinone methide derivative A) and a phenol compound B). The methods comprise adding from about 1-10,000 ppm of the combination to the monomer containing medium, per one million parts of the monomer.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: October 30, 2012
    Assignee: General Electric Company
    Inventors: Vinod Kumar Rai, Sherif Eldin, Mary King, John Link, Alagarsamy A. Subbiah, H. Kelly Herrington
  • Publication number: 20120264985
    Abstract: A process for inhibiting polymerization of an aromatic vinyl compound during the stage of producing, purifying, storing or transporting the aromatic vinyl compound which not only inhibits an initial polymerization but also inhibits polymerization efficiently over a long period of time and which is excellent in handleability. The process involves the step of adding a nitrogenous aromatic compound in combination with a sulfonic acid compound to the aromatic vinyl compound during the production, purification, storage of transportation thereof.
    Type: Application
    Filed: June 20, 2012
    Publication date: October 18, 2012
    Inventors: Junichi NAKAJIMA, Seiji Tanizaki
  • Patent number: 8258501
    Abstract: A method of using a metal complex as an n-dopant for doping an organic semiconducting matrix material in order to alter the latter's electrical characteristics is provided. In order to provide n-doped organic semiconductors with matrix materials having a low reduction potential, while achieving high conductivities, the n-dopant is a neutral electron-rich metal complex with a neutral or charged transition metal atom as a central atom and having at least 16 valence electrons. The complex can be polynuclear and can possess at least one metal-metal bond. At least one ligand can form a ? complex with the central atom, which can be a bridge ligand, or it can contain at least one carbanion-carbon atom or a divalent atom. Methods for providing the novel n-dopants are provided.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: September 4, 2012
    Assignee: Novaled AG
    Inventors: Ansgar Werner, Olaf Kühl, Simon Gessler, Horst Hartmann, Andre Grüssing, Michael Limmert, Andrea Lux, Kentaro Harada
  • Patent number: 8246858
    Abstract: A process for inhibiting polymerization of an aromatic vinyl compound during the stage of producing, purifying, storing or transporting the aromatic vinyl compound which not only inhibits an initial polymerization but also inhibits polymerization efficiently over a long period of time and which is excellent in the handleability. The process involves the step of adding a nitrogenous aromatic compound in combination with a sulfonic acid compound to the aromatic vinyl compound during the production, purification, storage of transportation thereof.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: August 21, 2012
    Assignee: Hakuto Co., Ltd.
    Inventors: Junichi Nakajima, Seiji Tanizaki
  • Publication number: 20120203020
    Abstract: The invention provides a composition and a method of using the composition for inhibiting the unwanted polymerization of ethylenically unsaturated monomers. The composition is prepared by reducing a nitroxide stable free radical to its corresponding hydroxylamine through reaction with a dialkyl/aryl hydroxylamine and subsequent addition of a polymerization prevention component selected from phenolic antioxidants, phenylenediamine and phenylenediamine derivatives, or phenothiazine and phenothiazine derivatives targeted towards ethylenically unsaturated monomers. The conversion of the nitroxide by the dialkyl/aryl hydroxylamine is to prevent it or the polymerization prevention component from being “spent” by reaction with each other, impurities or any other incompatible components. This allows previously incompatible combinations to now work effectively. In fact, the combination is more efficacious as the combination exerts a synergy due to the presence of various polymerization prevention reagents.
    Type: Application
    Filed: February 3, 2011
    Publication date: August 9, 2012
    Inventor: David Youdong Tong
  • Patent number: 8128804
    Abstract: An olefinically unsaturated monomer is stabilized by a retarder-containing composition which comprises a solvent and a quinone methide as a retarder.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 6, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Stefanie Weyler, Phillip James, Oliver Erpeldinger, Manfred Neumann, Frank Kraushaar
  • Publication number: 20110218371
    Abstract: A stabilized composition consists essentially of unsaturated hydrocarbon-based materials, and a stabilizer selected from the group consisting of a hydroxybenzophenone and a nitroxyl radical based stabilizer. A method for stabilizing unsaturated hydrocarbon-based precursor material against the polymerization comprises providing a stabilizer selected from the group consisting of a hydroxybenzophenone and a nitroxyl radical based stabilizer.
    Type: Application
    Filed: May 17, 2011
    Publication date: September 8, 2011
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Steven Gerard Mayorga, Kelly Ann Chandler
  • Publication number: 20090240092
    Abstract: Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one nitroso inhibitor of the structure: wherein R1, R2, R3, and R4 are independently selected from the group consisting of hydrogen, nitro, nitroso, halogen, COOR wherein R is hydrogen or alkyl, alkyl, and heteroatom-substituted alkyl; or adjacent groups R1, R2, R3, and R4 can be taken together to form a substituted or unsubstituted fused six-membered ring. Also disclosed is a composition of matter comprising: A) an ethylenically unsaturated monomer and B) at least one nitroso compound of the above-described structure.
    Type: Application
    Filed: June 5, 2009
    Publication date: September 24, 2009
    Inventors: Qinggao MA, William A. Wortman, Jay Wang, Paul E. Stott
  • Publication number: 20090149682
    Abstract: According to the present invention, there is provided a process for inhibiting polymerization of an aromatic vinyl compound during the stage of producing, purifying, storing or transporting the aromatic vinyl compound which not only inhibits an initial polymerization but also inhibits efficiently polymerization over a long period of time and which is excellent in the handleability. The present invention relates to a process for inhibiting polymerization of an aromatic vinyl compound which comprises adding a nitrogenous aromatic compound in combination with a sulfonic acid compound to the aromatic vinyl compound during the production, purification, storage or transportation.
    Type: Application
    Filed: March 23, 2007
    Publication date: June 11, 2009
    Inventors: Junichi Nakajima, Seiji Tanizaki
  • Patent number: 7473795
    Abstract: Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position. Additionally, a composition is disclosed that comprises: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: January 6, 2009
    Assignee: Uniroyal Chemical Company, Inc.
    Inventor: Brigitte Benage
  • Patent number: 7414162
    Abstract: Compositions and methods for inhibiting polymerization of ethylenically unsaturated monomers are provided. The compositions include a water-soluble phenylenediamine composition.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: August 19, 2008
    Assignee: General Electric Company
    Inventors: John Link, Sherif Eldin
  • Patent number: 7371906
    Abstract: A process for improving the stability to photo-oxidation of a polycyclic aromatic compound having at least two polymorphic forms comprises treating a first polymorph with one or more solvents to obtain the more stable second polymorph and then separating the second polymorph from the solvent.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: May 13, 2008
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, William F. Nichols, Manju Rajeswaran, Natasha Andrievsky, Michael R. Landry
  • Patent number: 7157611
    Abstract: A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon a pyrazinoporphyrazine dye having an absorption maximum from 700 nm to 900 nm.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: January 2, 2007
    Assignee: Rohm and Haas Company
    Inventors: Rajiv Manohar Banavali, Kim Sang Ho
  • Patent number: 7045647
    Abstract: Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position. Additionally, a composition is disclosed that comprises: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: May 16, 2006
    Assignee: Uniroyal Chemical Company, Inc.
    Inventor: Brigitte Benage
  • Patent number: 6969744
    Abstract: Disclosed is a method of preparing terminally functionalized telechelic polymers using a cationic living polymer product or a terminal tert-chloride chain end of a carbocationic quasiliving polymer product, which comprises quenching the polymer product with an N-substituted pyrrole to thereby functionalize the N-substituted pyrrole at the terminal reactive polymer chain end(s). Also disclosed are the terminal functionalized polyisobuyl N-substituted pyrrole compounds where the polyisobutyl group is substituted at the 2 and 3 position of the N-substituted pyrrole.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: November 29, 2005
    Assignees: University of Southern Mississippi, Chevron Oronite Company LLC
    Inventors: Casey D. Stokes, Robson F. Storey, James J. Harrison
  • Patent number: 6841061
    Abstract: An Anti-gelling agent for a hydrocarbon mixture containing a conjugated diene, which comprises (a) at least one compound selected from the group consisting of compounds having an NO radical in the molecule, and precursor compounds capable of forming an NO radical, (b) a phosphorus-containing compound, and (c) at least one compound selected from the group consisting of heterocyclic aldehydes, aromatic aldehydes and condensates of these aldehydes. Clogging in an apparatus for separating and refining a hydrocarbon mixture containing a conjugated diene can be prevented by adding the anti-gelling agent in the apparatus.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: January 11, 2005
    Assignee: Zeon Corporation
    Inventor: Keizo Ukita
  • Patent number: 6835288
    Abstract: A process for preventing undesired polymerization is conducted by maintaining an effective concentration of a stabilizer which comprises N-oxyl radicals in a mixture containing ethylenically unsaturated compounds, wherein (i) an electronic signal which correlates with the concentration of the N-oxyl radicals in the mixture is obtained periodically or continuously, (ii) the electronic signal is compared with a reference value, and (iii) addition of a stabilizer to the mixture is controlled according to the comparison (ii). The signal is preferably obtained by ESR measurement. The process permits efficient use of the stabilizer.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: December 28, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Friedrich Sutoris, Konrad Mitulla
  • Patent number: 6717021
    Abstract: A solvating component for a solvated mesophase pitch. The solvated component includes a mixture of aromatic hydrocarbons having boiling points in the atmospheric equivalent boiling point range of about 285° to about 500° C. (about 550° F.-932° F.). At least 80% of the carbon atoms of the hydrocarbons are aromatic as characterized by carbon 13 NMR. The aromatic hydrocarbons are selected from a group consisting of aromatic compounds having 2 to 5 aromatic rings, substituted aromatic compounds having 2 to 5 aromatic rings wherein said substituents are alkyl groups having 1 to 3 carbons, hydroaromatic compounds having 2 to 5 rings, substituted aromatic compounds having 2 to 5 rings wherein said substituents are alkyl groups having 1 to 3 carbons, and mixtures thereof.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: April 6, 2004
    Assignee: ConocoPhillips Company
    Inventors: H. Ernest Romine, John A. Rodgers, W. Mark Southard, Edward J. Nanni
  • Publication number: 20040010169
    Abstract: A method for marking a liquid petroleum hydrocarbon. The method comprises adding to the liquid petroleum hydrocarbon a pyrazinoporphyrazine dye having an absorption maximum from 700 nm to 900 nm.
    Type: Application
    Filed: June 19, 2003
    Publication date: January 15, 2004
    Inventors: Rajiv Manohar Banavali, Kim Sang Ho
  • Patent number: 6660181
    Abstract: A method is disclosed for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers a polymerization inhibiting amount of a mixture comprising A) a first inhibitor comprising 4-amino-2,2,6,6-tetramethylpiperidinyloxy, wherein said amino group is a primary, secondary, or tertiary amino group; and B) at least one other inhibitor having the structural formula: wherein: R1 and R4 are independently selected from the group consisting of hydrogen, alkyl, and heteroatom-substituted alkyl; R2 and R3 are independently selected from the group consisting of alkyl and heteroatom-substituted alkyl; X1 and X2 (1) are independently selected alkyl groups of 1 to 15 carbon atoms or (2) taken together, form a ring structure with the nitrogen.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: December 9, 2003
    Assignee: Crompton Corporation
    Inventors: Brigitte Benage, Angela M. Edwards, Vilen Kosover, Gan Wang, Anthony Gentile, Jesus R. Fabian, Gerald J. Abruscato
  • Patent number: 6653414
    Abstract: Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of a mixture comprising: A) at least one stable hindered nitroxyl compound having the structural formula: wherein R1 and R4 are independently selected from the group consisting of hydrogen, alkyl, and heteroatom-substituted alkyl and R2 and R3 are independently selected from the group consisting of alkyl and heteroatom-substituted alkyl; and X1 and X2 (1) are independently selected from the group consisting of halogen, cyano, COOR7, —S—COR7, —OCOR7, (wherein R7 is alkyl or aryl), amido, —S—C6H5, carbonyl, alkenyl, or alkyl of 1 to 15 carbon atoms, or (2) taken together, form a ring structure with the nitrogen; and B) at least one inhibitor selected from the group consisting of ortho-quinone, ortho-hydroquinone, para-quinone, para-hydroquinone, and derivatives of the foregoing.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: November 25, 2003
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Brigitte Benage, Brendan J. Geelan, Gerald J. Abruscato, Leo Bonnell
  • Publication number: 20030205503
    Abstract: A method for inhibiting and dissolving the deposits formed on caustic or alkaline scrubbers used in scrubbing acidic gases such as carbon dioxide, hydrogen sulfide, which are formed during the pyrolytic cracking of naphtha, ethane, and propane. The cracking operations produce certain oxygenated compounds such as vinyl acetate or acetaldehyde, which undergo polymerization under alkaline condition. The vinyl acetate on hydrolysis releases acetaldehyde under alkaline conditions. Amino acids such as 6 amino caproic acid and lactams such as epsilon caprolactam not only prevent but also dissolve the polymers formed by aldol condensation.
    Type: Application
    Filed: April 29, 2002
    Publication date: November 6, 2003
    Inventors: Mahesh Subramaniyam, Bankar Prashant
  • Publication number: 20030170511
    Abstract: The present invention relates to emulsion compositions for starting a reformer of a fuel cell system. In particular, the invention includes emulsion compositions comprising hydrocarbon fuel, water and alkoxylated triazine surfactants for starting a reformer of a fuel cell system.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 11, 2003
    Inventors: Ramesh Varadaraj, Paul Joseph Berlowitz
  • Patent number: 6579442
    Abstract: Methods and compositions for inhibiting the polymerization of vinyl monomers are disclosed. Combinations of nitroxyl compounds and aliphatic amines are effective at inhibiting the polymerization of vinyl monomers under both processing and storage conditions.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: June 17, 2003
    Assignee: GE Betz, Inc.
    Inventor: Sherif Eldin
  • Patent number: 6518453
    Abstract: In a process for stabilizing chemical compounds having at least one ethylenically unsaturated bond to undesired free radical polymerization, a nitroxyl radical and a chemical compound containing phosphorus in chemically bonded form are added to the unsaturated compound present as pure substance or as a component of a mixture.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: February 11, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Friedrich Sutoris, Gerhard Wagenblast, Volker Schliephake, Jürgen Schröder, Klaus Joachim Müller-Engel, Harald Keller, Thomas Jaworek
  • Publication number: 20030010676
    Abstract: Methods and compositions for inhibiting the polymerization of vinyl monomers are disclosed. Combinations of nitroxyl compounds and aliphatic amines are effective at inhibiting the polymerization of vinyl monomers under both processing and storage conditions.
    Type: Application
    Filed: May 22, 2001
    Publication date: January 16, 2003
    Inventor: Sherif Eldin
  • Patent number: 6475348
    Abstract: A mixture contains one or more vinyl-containing compounds as component (A) and, as a further component, a stabilizer (B) which contains one or more readily volatile nitroxyl compounds as component (b1), one or more sparingly volatile nitroxyl compounds as component (b2), if required one or more aromatic nitro compounds as component (b3) and, if required, one or more iron compounds as component (b4). Stabilizers (B) contain the components (b1) and (b2), (b1) and (b2) and (b3), (b1) and (b2) and (b4), and (b1), (b2), (b3) and (b4), and the premature polymerization of vinyl-containing compounds during their purification or distillation is inhibited by a process in which a stabilizer (B) is added or the components of stabilizer (B) are added as individual substances or in at least two groups of the components.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: November 5, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Friedrich Sutoris, Konrad Mitulla, Jacques Dupuis, Claus Kaliba
  • Patent number: 6409887
    Abstract: A monomer composition, stabilized against premature polymerization, comprising: a) an ethylenically unsaturated monomer or mixture of monomers polymerizable by free radical initiation, and b) an effective amount, sufficient to inhibit premature polymerization of component (a) of a mixture of: i) 1 to 99% by weight, based on the total weight of components (i) and (ii), of a mixture of at least one aromatic amine and at least one organic acid in a molar ratio of 10:1 to 1:10, and ii) 99 to 1% by weight, based on the total weight of components (i) and (ii), of at least one stable radical compound.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: June 25, 2002
    Assignee: AAH Marks and Company Limited
    Inventors: Anthony Pryce, Robert Charles Callin
  • Patent number: 6403850
    Abstract: Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one stable hindered nitroxyl compound having the structural formula:  wherein R1 and R4 are independently selected from the group consisting of hydrogen, alkyl, and heteroatom-substituted alkyl and R2 and R3 are independently selected from the group consisting of alkyl and heteroatom-substituted alkyl; and X1 and X2 (1) are independently selected from the group consisting of halogen, cyano, COOR7, —S—COR7, —OCOR7, (wherein R7 is alkyl of 1 to 15 carbon atoms, or (2) taken together, form a ring structure with the nitrogen; and B) at least one phenylenediamine, and, optionally, C) at least one nitroaromatic compound.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: June 11, 2002
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Brigitte Benage, Andrew J. Eisenstein
  • Patent number: 6395942
    Abstract: Compounds that inhibit polymerization of vinyl aromatic compounds need to operate at temperatures of about 90° C. to about 150° C. A process for increasing the thermal stability of inhibitors such as N,N′-di-2-butyl-N,N′-dinitroso-1,4-diaminobenzene is disclosed. The process comprises adding to the inhibitor a stabilizer such as N,N′-di-2-butyl-1,4-diaminobenzene. The mixture of inhibitor and stabilizer is also used to inhibit polymerization of vinyl aromatic compounds.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: May 28, 2002
    Assignee: UOP LLC
    Inventors: Paul R. Kurek, Robert R. Frame
  • Patent number: 6395943
    Abstract: A process is disclosed for inhibiting the polymerization of vinyl aromatic compounds, such as styrene, during its distillation. The process involves adding a mixture of at least two inhibitors to the vinyl aromatic compound. One such combination is N,N′-di-2-butyl-N,N′,4-dinitroso-1,4-diaminobenzene and dinitrocresol. A stabilizer such as N,N′-di-2-butyl-1,4-diaminobenzene can also be added.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: May 28, 2002
    Assignee: UOP LLC
    Inventors: Paul R. Kurek, Robert R. Frame
  • Patent number: 6379588
    Abstract: A monomer composition, which contains A) vinyl-containing monomers in which a heteroatom selected from the group consisting of the halogens, nitrogen, oxygen, sulfur and silicon is present on the vinyl group, and B) a compound or a mixture of compounds of the formula II  where R4 is methyl, ethyl, isopropyl, n-propyl, n-butyl, isobutyl, sec-butyl, tert-butyl or trimethylsilyl.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: April 30, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Friedrich Sutoris, Andreas Koch, Alexander Aumüller, Jacques Dupuis, Manfred Niessner
  • Patent number: 6376728
    Abstract: Method of inhibiting polymerization of alkenyl monomers comprising contacting the alkenyl monomers with: wherein R1 and R2 independently of one another are alkyl, phenyl, aryl, alkoxy, or carboxy groups; and oxygen. Mixture comprising: a) alkenyl monomers with:  wherein R1 and R2 independently of one another are alkyl, phenyl, aryl, alkoxy or carboxy groups; and c) oxygen.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: April 23, 2002
    Assignee: Hercules Incorporated
    Inventors: Sherif Eldin, John Link
  • Publication number: 20020040174
    Abstract: A monomer composition, stabilized against premature polymerization, comprising: a) an ethylenically unsaturated monomer or mixture of monomers polymerizable by free radical initiation, and b) an effective amount, sufficient to inhibit premature polymerization of component (a) of a mixture of: i) 1 to 99% by weight, based on the total weight of components (i) and (ii), of a mixture of at least one aromatic amine and at least one organic acid in a molar ratio of 10:1 to 1:10, and ii) 99 to 1% by weight, based on the total weight of components (i) and (ii), of at least one stable radical compound.
    Type: Application
    Filed: April 13, 2001
    Publication date: April 4, 2002
    Applicant: A H MARKS AND COMPANY LIMITED
    Inventors: Anthony Pryce, Robert Charles Callin
  • Patent number: 6348136
    Abstract: The present invention is directed to an apparatus and method for the distillation of a readily polymerizable vinyl aromatic compound employing a polymerization inhibitor. The vinyl aromatic compound is subjected to distillation in at least one fractionation column having at least one reboiler for maintaining the bottoms of said column at a proper temperature. The reboiler includes a heating section and a vapor phase section. The bottoms fraction from the fractionation column is cycled to the reboiler and subjected to heat to vaporize at least a portion of the bottoms fraction to form a vapor phase in the vapor section, A slip stream of the bottoms fraction is introduced to the vapor phase section of the reboiler. The slipstream contains polymerization inhibitor that had been added to the process at the fractionation column. The invention reduces fouling at the reboilers. The slipstream is optionally introduced to the reboiler using one or more spray nozzles.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: February 19, 2002
    Assignee: Fina Technology, Inc.
    Inventors: Marcus E. Ledoux, Kelli E. Prince, Adrian M. Jacobsen, Larry P. Braud, Jr.
  • Publication number: 20020011427
    Abstract: A solvating component for a solvated mesophase pitch. The solvated component includes a mixture of aromatic hydrocarbons having boiling points in the atmospheric equivalent boiling point range of about 285° to about 460° C. (about 550° F.-932° F.). At least 80% of the carbon atoms of the hydrocarbons are aromatic as characterized by carbon 13 NMR. The aromatic hydrocarbons are selected from a group consisting of aromatic compounds having 2 to 5 aromatic rings, substituted aromatic compounds having 2 to 5 aromatic rings wherein said substituents are alkyl groups having 1 to 3 carbons, hydroaromatic compounds having 2 to 5 rings, substituted aromatic compounds having 2 to 5 rings wherein said substituents are alkyl groups having 1 to 3 carbons, and mixtures thereof.
    Type: Application
    Filed: June 4, 2001
    Publication date: January 31, 2002
    Inventors: H. Ernest Romine, John A. Rodgers, W. Mark Southard, Edward J. Nanni
  • Patent number: 6342648
    Abstract: The present invention provides compositions and methods inhibiting polymerization of vinyl aromatic compounds comprising a bisphenol compound and an oxidized p-phenylenediamine. In a specific, non-limiting embodiment, the polymerization of the vinyl aromatic compound styrene is inhibited by a composition comprising the bisphenol compound 4,4′-methylenebis(2,6-di-tert-butyphenol) and the oxidized p-phenylenediamine compound N-phenyl-N′-methyl-benzoquinonediimide.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: January 29, 2002
    Assignee: Baker Hughes Incorporated
    Inventor: Muslim D. Shahid