Patents Examined by Scott C. Rand
  • Patent number: 5368867
    Abstract: The production of dilute equilibrium, storage stable solutions of peracetic acid from mixtures of aqueous hydrogen peroxide and acetic acid, or by dilution of more concentrated peracetic acid solutions, takes a long time because of the low concentrations of the active participating materials. The process can be accelerated by employing a two step procedure in which a concentrated peracetic acid solution is diluted with water and partially hydrolysed in the first step, and then the hydrolysis reaction is quenched by addition of hydrogen peroxide in the second step.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: November 29, 1994
    Assignee: Peroxidos Do Brasil
    Inventors: Alcides B. Da Silva, Joao B. Tognetti, Jal R. Dadabhoy
  • Patent number: 5364971
    Abstract: The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, e.g. 120.degree.-170.degree. C., and pressure, e.g. 500 to 6000 psig. the colored polyamines, e.g. triethylenetetramine and tetraethylenepentamine, in the presence of a ruthenium on alumina hydrogenation catalyst. The catalyst for the polyamine decolorization process preferably has at least 0.5 wt. % Ru. In the process of the present invention, the polyamines can either be distilled into a narrow product composition and then hydrogenareal, or a crude polyamine product can be hydrogenated and then distilled to produce the desired product composition.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: November 15, 1994
    Assignee: Texaco Chemical Inc.
    Inventor: Wei-Yang Su
  • Patent number: 5362914
    Abstract: The present invention relates to a process for the reduction of the color of polyamines by reacting at elevated temperature, e.g. 120.degree.-170.degree. C., and pressure, e.g. 500 to 6000 psig. the colored polyamines, e.g. triethylenetetramine and tetraethylenepentamine, in the presence of a cobalt on alumina hydrogenation catalyst promoted with copper and chromium. In the process of the present invention, the polyamines can either be distilled into a narrow product composition and then hydrogenated, or a crude polyamine product can be hydrogenated and then distilled to produce the desired product composition.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: November 8, 1994
    Assignee: Texaco Chemical Inc.
    Inventor: Wei-Yang Su
  • Patent number: 5362913
    Abstract: Highly saturated, highly aminated alkoxylated polymers may be reliably made by an improved process involving the steps of (1) polymerizing one or more unsaturated hydrocarbons to form a liquid polymer, where at least one of the unsaturated hydrocarbons is butadiene; (2) providing the liquid polymer with terminal hydroxyl groups; (3) alkoxylating the hydroxylated liquid polymer with one or more alkylene oxides having at least three carbon atoms to provide secondary terminal hydroxyl groups; (4) simultaneously aminating and hydrogenating the alkoxylated liquid polymer to produce an essentially saturated, aminated, alkoxylated liquid polymer in the presence of hydrogen and ammonia and a catalyst. The catalyst preferably contains nickel as the single greatest component, with smaller amounts of copper, chromium and molybdenum. Excesses of hydrogen and ammonia are used in the final step.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: November 8, 1994
    Assignee: Huntsman Corporation
    Inventors: John F. Knifton, Michael Cuscurida
  • Patent number: 5359141
    Abstract: The invention relates to an improved process for the production of polynuclear aromatic polyamines by condensation of aniline with formaldehyde in the presence of water and acidic catalysts and working up of the reaction mixture by extraction with a hydrophobic solvent, the acid catalyst accumulating in the aqueous phase of the extraction step being reused.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: October 25, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hartmut Knofel, Michael Brockelt, Marcel Petinaux, Rudolf Uchdorf, Hans-Peter Schal
  • Patent number: 5354781
    Abstract: The present invention relates to compounds of the formula ##STR1## in which: p1 R.sub.1 is hydrogen or a halogen atom; R.sub.2 is a cyclohexyl or a phenyl;R.sub.3 is a (C.sub.3 -C.sub.6) cycloalkyl;R.sub.4 is hydrogen, (C.sub.1 -C.sub.6) alkyl or (C.sub.3 -C.sub.6)cycloalkyl;A is --CO--CH.sub.2 --, --CH(CI)--CH.sub.2 --, --CH(OH)--CH.sub.2 --, CH.sub.2 --CH.sub.2 --, --CH.dbd.CH-- and --C.tbd.C--, or their addition salt with mineral or organic acids. These compounds are active on the immune system. The present invention further relates to a method of preparing said compounds and to the pharmaceutical compounds in which they are present.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: October 11, 1994
    Assignee: Sanofi
    Inventors: Jean-Claude Breliere, Pierre Casellas, Serge Lavastre, Raymond Paul
  • Patent number: 5354893
    Abstract: The present invention relates to an improved catalyst for the selective synthesis of monomethylamine (MMA) and dimethylamine (DMA) at the expense of trimethylamine (TMA) for a starting feed of methanol and/or dimethyl ether and ammonia. The current industrial catalyst for this process is a standard SiO.sub.2 /Al.sub.2 O.sub.3 material. The present invention combines this standard catalyst with microporous carbon molecular sieves (CMS) to form a composite material (i.e., a CMS/SiO.sub.2 /Al.sub.2 O.sub.3 material) with higher selectivity for the desired products MMA and DMA. The invention also relates to methods of making the improved catalyst and a process of using the improved catalyst material in the production of MMA and DMA.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: October 11, 1994
    Assignees: The University of Delaware, E. I. Du Pont de Nemours Company, Inc.
    Inventors: Henry C. Foley, George C. Sonnichsen, Loren D. Brake, Ravindra K. Mariwala, David S. Lafyatis
  • Patent number: 5352822
    Abstract: The present invention discloses pesticidally active compounds of formula (II) ##STR1## or a salt thereof, wherein Q is an monocyclic aromatic ring, or fused bicyclic ring system of which at least one ring is aromatic containing 9 or 10 atoms of which one may be nitrogen and the rest carbon each ring system being optionally substituted, or Q is a dihalovinyl group or a group R.sup.6 --C.tbd.C-- where R.sup.6 is C.sub.1-4 alkyl, tri C.sub.1-4 alkylsilyl, halogen or hydrogen; R.sup.2, R.sup.3 , R.sup.4 and R.sup.5 are the same or different with at least one being hydrogen and the others being independently selected from hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 haloalkyl; and R.sup.1 is selected from hydrogen and C.sub.1-8 hydrocarbyl optionally substituted by dioxalanyl, halo, cyano, trifluoromethyl, trifluoromethylthio or C.sub.1-6 alkoxy and X.sup.1 is hydrogen, fluoro or chloro.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: October 4, 1994
    Assignee: Roussel Uclaf
    Inventors: Robert J. Blade, George S. Cockerill, John E. Robinson
  • Patent number: 5352835
    Abstract: Disclosed is a process for the amination of polyols to form primary amines which comprises reacting a polyoxyalkylene alcohol or polyol having a molecular weight of from about 230 to 5000 and ammonia in the presence of hydrogen over a catalyst consisting essentially of 10 to 35 wt % nickel, 1 to 20 wt % copper and 0.1 to 2.0 wt % optionally chromium or molybdenum promoter impregnated onto a .theta.-alumina support at a temperature of 100.degree. C. to 300.degree. C. and a pressure of 1000 psig to 3000 psig wherein the .theta.-alumina support results from calcining .gamma.-alumina or pseudo-boehmite for 2-4 hours at 900.degree.-1100.degree. C.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: October 4, 1994
    Assignee: Texaco Chemical Company
    Inventors: Pei-Shing E. Dai, Terry L. Renken, Laurence D. Neff
  • Patent number: 5349109
    Abstract: A process for making unsaturated .alpha.-amines from olefins wherein the process includes adding an aminating agent, an olefin and a molybdenum based catalyst to a reaction vessel having a nitrogen atmosphere. The catalyst may be described by the general formula LL'MoO.sub.2, L.sub.2 L'MoO.sub.2, or LL'MoO(X-Y).
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: September 20, 1994
    Assignee: The Board of Regents of the University of Oklahoma
    Inventors: Kenneth M. Nicholas, Anurag S. Srivastava
  • Patent number: 5347042
    Abstract: The invention relates to new optically active sulphur-containing amino acid derivatives, a process for their preparation, their polymerisation to give optically active polymers and the use of these optically active polymers as adsorbents for chromatographic separation of racemates into enantiomers.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: September 13, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Grosse-Bley, Bruno Bomer, Rolf Grosser, Dieter Arlt, Walter Lange
  • Patent number: 5347053
    Abstract: This invention relates to an improvement in a process for producing an alkylamine from olefin and amine by hydrohalogenating the olefin to form haloalkane then reacting the haloalkane with amine to form an alkylamine. The improvement comprises heat-treating the alkylamine thus formed with an aqueous alkaline or alkaline earth metal hydroxide at a temperature and for a period of time sufficient to minimize the formation of flocculent precipitate during the formation and/or storage of the alkylamine.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: September 13, 1994
    Assignee: Albemarle Corporation
    Inventors: Bonnie G. McKinnie, W. Brian Harrod
  • Patent number: 5344984
    Abstract: A method for preparing "twin-tailed" tertiary amines which have two moles of alkoxylated phenol bonded to each nitrogen function of a molecule of methylamine and represented by the formula: ##STR1## wherein x represents zero to about 30 which comprises alkylating a mole of methylamine with two moles of alkoxylated alkylphenol over a catalyst comprising:5 to 70% nickel;1 to 20% copper;0.1 to 10% chromium; and0.1 to 10% molybdenum on an alumina support.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: September 6, 1994
    Assignee: Texaco Chemical Company
    Inventors: John F. Knifton, Carter G. Naylor
  • Patent number: 5344989
    Abstract: An improved process for production of monomethylamines and dimethylamines, wherein an acidic zeolite H--ZK-5 prepared from K,Sr--ZK-5 is used to increase selectivity of the reaction.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: September 6, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David R. Corbin, Stephan Schwarz
  • Patent number: 5344979
    Abstract: A method is provided for purifying a crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a wet crude APAP; and b) subsequently drying said crude APAP in the presence of a sufficient amount of an acetylating agent for a sufficient period of time to convert said color bodies or their precursors to substantially non-color bodies.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: September 6, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Edward G. Zey, George A. Blay
  • Patent number: 5334763
    Abstract: A process for reducing the amount of the ethoxylated amine byproducts MEAGE, DEAGE and TEAGE formed in a process for making ethanolamines from the reaction of ethylene oxide and ammonia, comprising feeding carbon dioxide or a material which will evolve carbon dioxide to a reactor for conducting such process.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: August 2, 1994
    Assignee: The Dow Chemical Company
    Inventors: Samuel J. Washington, Tony F. Grant
  • Patent number: 5331101
    Abstract: A process for preparing amines or imines which comprises contacting an alcohol, aldehyde, or ketone with an aminating agent in the presence of a catalyst under reaction conditions sufficient to form an amine or imine, wherein the catalyst comprises a homogeneous mixture of (a) 10-90 mole percent cobalt or an insoluble salt thereof, (b) 9-89 mole percent copper or an insoluble salt thereof, and (c) 1-20 mole percent of a metal or insoluble salt of a metal selected from the group consisting of a Lanthanum series metal, thorium, uranium, scandium, titanium, and yttrium is described. A process which employs zirconium as component (c) and which is supported on a carrier material, wherein the carrier material has been neutralized with a base, is also disclosed.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: July 19, 1994
    Assignee: The Dow Chemical Company
    Inventor: Clarence E. Habermann
  • Patent number: 5331102
    Abstract: Color-containing alkanolamines or alkyleneamines, having color numbers of up to 100 PtCo or higher, can be treated with inorganic solid acidic catalysts. Inorganic support materials having bonded inorganic acid functionalities may be used as the inorganic solid acidic catalysts. In the presence of water, these inorganic solid acidic catalysts produce decolorized alkanolamines or alkyleneamines having color numbers of 20 PtCo or less. The process of decolorization can be carried out in batch or continuous mode processes thus providing low cost, high quality and high purity end products.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: July 19, 1994
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Charles A. Gibson
  • Patent number: 5326911
    Abstract: Ortho-amides of the formula ##STR1## can be prepared by reacting salts of the formula ##STR2## with alcoholates of the formulaM.sup.1 OR.sup.1 (III)where the radicals R.sup.1 to R.sup.4, M.sup.1 and X.sup..crclbar. have the meaning given in the description. The alcoholates are employed in highly active form with an effective content of 98-100% M.sup.1 OR.sup.1.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: July 5, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Ulrich Blank, Helmut Kraus, Gerhard Marzolph, Nikolaus Muller
  • Patent number: 5322965
    Abstract: Optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine can be obtained by catalytic hydrogenation of optionally substituted aniline, a catalyst being employed which contains ruthenium, palladium or a mixture of both metals, which are applied to a support of niobic acid or tantalic acid or a mixture of both. The catalyst contains the noble metal(s) in a total amount from 0.05 to 5% by weight, relative to the total weight of the catalyst. In the case of the use of both noble metals, their weight ratio to one another is 1:9-9:1.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: June 21, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Immel, Gerhard Darsow, Helmut Waldmann, Gerd-Michael Petruck