Patents Examined by Asok Pal
  • Nickel-containing composition for catalysis and olefin dimerisation and oligomerisation process
    Patent number: 5550304
    Abstract: The invention concerns a catalytic composition and a process for the dimerisation, codimerisation or oligomerisation of olefins, said composition comprising a mixture of at least one bivalent nickel complex which contains two tertiary phosphine molecules, at least one nickel complex which contains neither water nor phosphine, and at least one alkylaluminium halide. The mixture is particularly for use in ionic type non aqueous liquid compositions, such as those formed by quaternary ammonium halides and/or quaternary phosphonium halides with aluminium halides and/or alkylaluminium halides.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: August 27, 1996
    Assignee: Institut Francais Du Petrole
    Inventors: Yves Chauvin, Sandra Einloft, Helene Olivier
  • Vanadium (IV)-containing nasicon materials
    Patent number: 5550308
    Abstract: The present invention provides a composition of matter having the formulaA.sub.x B.sub.1-x V.sub.y C.sub.1-y P.sub.3 O.sub.10-15wherein A is Nb or Ta, B is Sb, C is Ti or Sn, and 0.ltoreq.x,y.ltoreq.1, a composition of matter having the formulaM.sub.z A.sub.x B.sub.1-x V.sub.y C.sub.1-y P.sub.3 O.sub.10-15wherein M is selected from the group consisting of Cu, Ag, Na, K, and Cs, A is Nb or Ta, B is Sb, C is Ti or Sn, and 0.ltoreq.x,y,z .ltoreq.1, a composition of matter having the formulaM.sub.z A.sub.x B.sub.1-x V.sub.y C.sub.1-y P.sub.3-n Si.sub.n O.sub.10-15wherein M is selected from the group consisting of Cu, Ag, Bi, Na, K, Rb, and Cs, A is Nb or Ta, B is Sb or As, C is Ti, Zr, Sn, or Ge, and 0.ltoreq.x,z.ltoreq.1, 0<y.ltoreq.1, and 0.ltoreq.n.ltoreq.2, and conversion processes catalyzed by at least one of the composition.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: August 27, 1996
    Inventors: Pradyot A. Agaskar, Robert K. Grasselli
  • Catalytic Cracking
    Patent number: 5547564
    Abstract: Catalytic cracking catalysts which contain bayerite and/or eta alumina are used to process hydrocarbon feedstocks that contain nickel.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: August 20, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Wu-Cheng Cheng, Kuppuswamy Rajagopalan
  • Regeneration of hydrogen fluoride alkylation catalyst
    Patent number: 5547909
    Abstract: An improved process for the regeneration of an ASO-containing HF catalyst by the removal of ASO from said catalyst through the utilization of a separation column equipped with fixed valve fractionation trays. The separation column defines a separation zone having a top zone, an intermediate zone, and a bottom zone wherein contained within the bottom zone is a series of vertically spaced, fixed valve fractionation trays, wherein each of the fixed valve fractionation trays include a plate defining a plurality of apertures and wherein fixedly spaced above each of the apertures is a valve having a shape substantially the same as the apertures for directing the flow of gas passing upwardly through the apertures of the plate into the direction substantially parallel to the plate.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: August 20, 1996
    Assignee: Phillips Petroleum Company
    Inventor: LeRoy W. Carlson
  • Process for producing exhaust-gases-purifying catalyst
    Patent number: 5547913
    Abstract: A process for producing an exhaust-gases-purifying catalyst includes the steps of loading an NO.sub.x adsorbent on a porous support, carbonating the porous support with the NO.sub.x adsorbent loaded, thereby converting the NO.sub.x adsorbent into carbonate, and loading a noble metal catalyst ingredient on the porous support with the carbonate loaded. The process can produce an exhaust-gases-purifying catalyst on which the NO.sub.x adsorbent and the noble metal catalyst ingredient are loaded in large amounts and which can stably and efficiently purify NO.sub.x during the fuel-lean side (i.e., in the oxygen-rich atmospheres) driving.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: August 20, 1996
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Riemi Muramoto
  • Starch-based texturizing agent
    Patent number: 5547513
    Abstract: A novel starch-based texturizing agent is disclosed. The texturizing agent is produced from high amylose (>30%) starch under specific conditions of temperature, pressure and shear. The texturizing agent functions to provide several fat-like attributes such as structure, viscosity, smoothness and opacity to reduce and/or essentially replace the fat content in foods. Additionally the texturizing agent can be used in full fat foods as a stabilizer. Foods containing the novel texturizing agents include mayonnaise, spoonable and pourable salad dressings, yogurt, cottage cheese, processed cheese, sour cream, edible spreads, cream cheese, peanut butter, frosting, meat products, cheesecake, mousse and sauces, among others. The texturizing agent can also be incorporated into drug and cosmetic formulations.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: August 20, 1996
    Assignee: Opta Food Ingredients, Inc.
    Inventors: Francis M. Mallee, Joel A. Stone, Eugene T. Finocchiaro
  • Ethylene oxide catalyst and process
    Patent number: 5545603
    Abstract: This invention relates to an ethylene oxide catalyst having improved initial selectivity which catalyst comprises silver, a promoting amount of alkali metal, a promoting amount of rhenium and a promoting amount of rhenium co-promoter selected from phosphorus, boron and mixtures thereof, supported on a porous refractory support.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: August 13, 1996
    Assignee: Shell Oil Company
    Inventor: Richard A. Kemp
  • Method for inhibiting premature polymerization of vinyl aromatic monomers
    Patent number: 5545782
    Abstract: Nitroxyl inhibitors in combination with some oxygen reduce the premature polymerization of vinyl aromatic monomers during the manufacturing processes for such monomers. Even small quantities of air used in combination with the nitroxyl inhibitors result in vastly prolonged inhibition times for said monomers.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: August 13, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland A. E. Winter, Volker H. von Ahn
  • Method of modifying molecular sieves by means of solid state ion exchange, and a method for hydrogenating olefinic compounds
    Patent number: 5545784
    Abstract: Molecular sieves are modified by an ion exchange process where metal cations are introduced into the molecular sieves by means of solid state ion exchange. The solid state ion exchange can be carried out as follows: a weighed amount of calcined and activated zeolite is intimately mixed with a precalculated amount of PtCl.sub.2, PdCl.sub.2, RhCl.sub.3, CuCl.sub.2, V.sub.2 O.sub.5 or another compound of the noble metals (e.g., corresponding halides or oxides), the solids mixture is then heated in a current of inert gas (e.g., a current of helium gas or of nitrogen) to temperatures of 400.degree. to 600.degree. C., then cooled down to room temperature and subsequently reduced in a current of hydrogen for 10 to 14 hours at 280.degree. to 350.degree. C. in order to produce small metal clusters from the cationically introduced metal.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: August 13, 1996
    Assignee: Degussa Aktiengesellschaft
    Inventors: Jens Weitkamp, Stefan Ernst, Thomas Bock, Thomas Kromminga, Akos Kiss, Peter Kleinschmit
  • Process for the dimerization of a conjugated diene
    Patent number: 5545789
    Abstract: The invention relates to a process for the dimerization of a conjugated diene using an iron triad metal nitrosyl halide, in combination with a reducing agent, as catalyst. The process is characterized in that the dimerization is carried out in the presence of nitrogen monoxide (NO). The invention is of interest in particular for the dimerization of butadiene to 4-vinyl cyclohexene.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: August 13, 1996
    Assignee: DSM N.V.
    Inventors: Henricus A. M. Duisters, Johan G.D. Haenen
  • Polyether-containing double metal cyanide catalysts
    Patent number: 5545601
    Abstract: Improved double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and from about 5 to about 80 wt. % of a polyether polyol that has tertiary hydroxyl groups. Compared with other DMC catalysts, those of the invention have excellent activity for epoxide polymerization, and they can be used to make polyols having very low unsaturation even at high epoxide polymerization temperatures.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: August 13, 1996
    Assignee: Arco Chemical Technology, L.P.
    Inventor: Bi Le-Khac
  • Process for dehydrogenating hydrocarbons and oxygenated hydrocarbons
    Patent number: 5545787
    Abstract: A continuous process for the dehydrogenation of a hydrocarbon and/or oxygenated hydrocarbon feed, comprising contacting the hydrocarbon and/or oxygenated hydrocarbon feed with a dehydrogenation catalyst at elevated temperature in a reaction zone characterized in that the catalyst is capable of retaining hydrogen and (a) is contacted with a feed to form a dehydrogenated product and hydrogen, at least some of the hydrogen formed being adsorbed by the catalyst and/or reacting therewith to reduce at least part of the catalyst; (b) the dehydrogenated product and any unadsorbed/unreacted hydrogen is removed from the reaction zone; (c) at least some of the adsorbed hydrogen is removed from the catalyst and/or at least some of the reduced catalyst is oxidized; and (d) reusing the catalyst from step (c) in step (a).
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: August 13, 1996
    Assignee: BP Chemicals Limited
    Inventors: Jeremy B. Cooper, Jonathon C. Frost, Stephen R. Partington
  • Method for inhibiting premature polymerization of vinyl aromatic monomers
    Patent number: 5545786
    Abstract: Nitroxyl inhibitors in combination with some oxygen reduce the premature polymerization of vinyl aromatic monomers during the manufacturing processes for such monomers. Even small quantities of air used in combination with the nitroxyl inhibitors result in vastly prolonged inhibition times for said monomers.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: August 13, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland A. E. Winter, Volker H. von Ahn
  • Process for producing a high quality lubricating oil using a VI selective catalyst
    Patent number: 5543035
    Abstract: A process is provided for producing a high quality lubricating oil base stock with a catalyst having a high viscosity index selectivity and low fouling rate. The catalyst contains a low amount of zeolite, and has a pore size distribution characterized by a significant amount of large pores.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: August 6, 1996
    Assignee: Chevron U.S.A. Inc.
    Inventor: James N. Ziemer
  • Foam control agents in granular form
    Patent number: 5540856
    Abstract: The present invention provides stable, free-flowing foam-control agent in granular form, comprising a silicone antifoam compound, a carrier material, an organic coating material, characterized in, that they contain a crystalline or amorphous aluminosilicate, at a weight ratio with the silicone antifoam compound of 1/5 to 2/1.The present invention also provides a method to make such agents, and detergent compositions containing said foam control agent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 30, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Jean Wevers, Marcel J. J. De Cupere
  • Phosphorus-treated activated carbon composition
    Patent number: 5538929
    Abstract: Disclosed is a phosphorus treated activated carbon composition suitable for use as catalyst support, catalyst, and an adsorbent, which is produced by treating (e.g., by mixing or impregnating) an activated carbon material having a surface area greater than 100 m.sup.2 /g with a phosphorus-containing compound, drying, and heating to a temperature of from 450.degree. C. to about 1200.degree. C., wherein the resulting composition is characterized by a phosphorus compound combined with the carbon in the amount of from above 2.5% to about 10% phosphorus, based on the weight of the composition.
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: July 23, 1996
    Assignees: Westvaco Corporation, Texaco, Inc.
    Inventors: Chakka Sudhakar, Robert K. Beckler, James R. Miller, Mahendra S. Patel
  • FCC catalyst stripping with vapor recycle
    Patent number: 5538623
    Abstract: An FCC process and apparatus operates with closed reactor cyclones and a catalyst stripper using H2 or recycled stripper vapor for stripping gas. Preferably stripper vapor is removed, cooled and condensed, and some vapor recycled to the stripper. Isolation of the stripper from the cracked product vapors permits use of large amounts of stripping steam, or stripping gases such as hydrogen.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: July 23, 1996
    Inventors: David L. Johnson, Diane V. Jorgensen
  • Methods and compositions for inhibiting the polymerization of dichlorobutene
    Patent number: 5538622
    Abstract: Methods and compositions for inhibiting the polymerization of crude dichlorobutene during its processing are disclosed. The methods comprise adding an effective polymerization inhibiting amount of a composition of a hydroxylamine compound and a metal deactivator compound to the dichlorobutene. The preferred hydroxylamine compound is bis-(2-hydroxypropyl)hydroxylamine and the preferred metal deactivator compound is a Mannich reaction product.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: July 23, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Isomerization process using modified zeolite Omega
    Patent number: 5536895
    Abstract: Forms of zeolite Omega synthesized by hydrothermal crystallization from reaction systems containing alkali metal cations and organic templating agents, modified by calcination in air, ion-exchange, steam calcination and treatment with a low-pH aqueous ammonium ion solution, are significantly improved with respect to surface area, catalytic activity and adsorption capacities for large molecular species. A catalyst comprising zeolite Omega is effective for isomerization of aromatics and aliphatics.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: July 16, 1996
    Assignee: UOP
    Inventors: Vinayan Nair, Donald F. Best, Gregory J. Gajda
  • Catalyst containing zeolite Beta
    Patent number: 5536687
    Abstract: A composition of matter comprising both (1) zeolite Beta and a (2) Y zeolite having either a unit cell size below about 24.45 angstroms or a water vapor sorption capacity at 25.degree. C. at P/P.sub.o of 0.10 of less than 10.00 weight percent. Typical of the Y zeolites used in the composition of the invention is a UHP-Y zeolite such as LZ-10 zeolite. The composition is especially suited for use in combination with one or more hydrogenation components as a catalyst for hydrocracking various types of feedstocks to produce either gasoline or middle distillate products.
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: July 16, 1996
    Assignee: UOP
    Inventor: John W. Ward