Patents Examined by E. D. Irzinski
  • Alkylation catalyst complex
    Patent number: 5324699
    Abstract: The present invention relates to a novel alkylation catalyst complex and to alkylation processes employing such a catalyst complex. More specifically, the invention relates to a novel catalyst complex comprising a BF.sub.3 :H.sub.3 PO.sub.4 adduct, and at least one polar hydrocarbon formed in situ. The catalyst complex may optionally include water as well as an added solubilizing agent. The invention further includes a pretreatment method for enhancing the isoparaffin selectivity of a catalyst complex containing a BF.sub.3 :H.sub.3 PO.sub.4 adduct.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: June 28, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Kenneth J. Del Rossi, Albin Huss, Jr., Samuel A. Tabak
  • Process for preparing of aromatic hydrocarbons
    Patent number: 5321179
    Abstract: A process for producing modified crystalline galloalumino silicate having the ZSM-5 crystal structure, and a process for producing aromatic hydrocarbons by the use of a catalyst containing the above modified crystalline galloalumino silicate are disclosed. The modified crystalline galloalumino silicate having the ZSM-5 type crystal structure is produced by calcining galloalumino silicate having the ZSM-5 type crystal structure as obtained by the hydrothermic reaction, at a temperature of 700 to 1,000.degree. C. The aromatic hydrocarbons are produced by contacting hydrocarbons having 2 to 12 carbon atoms with a catalyst containing the above modified crystalline galloalumino silicate.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: June 14, 1994
    Assignee: Research Association for Utilization of Light Oil
    Inventor: Junichi Kanai
  • Oligomerization of ethylene with a supported nickel catalyst
    Patent number: 5321190
    Abstract: There is provided a catalyst comprising nickel supported on a pillared (e.g., silica pillared) vacancy titanate material. There is also provided a method for preparing this catalyst. This method may involve impregnating a pillared vacancy titanate material with a nickel nitrate solution. There is further provided a process for oligomerizing ethylene using this catalyst.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: June 14, 1994
    Assignee: Mobil Oil Corp.
    Inventors: Brent A. Aufdembrink, Margaret M. Wu
  • Dimerization catalyst systems and processes
    Patent number: 5320993
    Abstract: A catalyst system composition and a process to prepare a catalyst composition comprising a cobalt compound, a metal alkyl and a coordinating compound is provided. The resultant catalyst system composition can be used to dimerize ethylene with high productivity to butenes and high selectivity to 1-butene.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: June 14, 1994
    Assignee: Phillips Petroleum Company
    Inventor: An-hsiang Wu
  • Olefin hydrogenation procedure
    Patent number: 5321175
    Abstract: Procedure of olefin hydrogenation in liquid phase in the presence of homogeneous catalysts that contain, as essential component, a titanocene of general formula Cp CpTiR.sub.2, Cp CpTiR.sub.2, Cp Cp[CpTiR.sub.2 ].sub.2, or Cp Cp[Cp TiR.sub.2 ].sub.2 where Cp is a pentamethylcyclopentadienyl, Cp cyclopentadienyl, Cp Cp are two cyclopentadienyl rings linked together by a dimethylsililene (Me.sub.2 Si), and R is an alyl, aryl, alkylaryl, or alcoxide group containing between 1 and 20 carbon atoms or a halogen atom, a PPh.sub.2, CH.sub.2 SiMe.sub.3, CH.sub.2 PPh.sub.2, or H.These catalysts are very active in the hydrogenation of linear and branched, internal and external olefins, cycloolefins and diolefins.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: June 14, 1994
    Assignee: Repsol Quimica S.A.
    Inventors: Juan Antonio Barrio Calle, Maria Dolores Parellada Ferrer, Agreda Tomas C., Juan C. F. Serrano, Pascual R. Gracia
  • Pretreatment method for C.sub.8 aromatic isomerization process
    Patent number: 5321184
    Abstract: A pretreatment method for a C.sub.8 aromatic isomerization process wherein the isomerization catalyst is initially contacted with a C.sub.8 aromatic feedstock under high severity isomerization conditions for a period of time sufficient to deposit a substantial amount to carbonaceous material on the catalyst. After pretreatment, the carbon-laden catalyst continues to be contacted by the C.sub.8 aromatic feedstock under less severe conditions than that of the pretreatment mode of operation.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: June 14, 1994
    Assignee: UOP
    Inventors: Chi-Chu D. Low, Randy J. Lawson, Paul J. Kuchar, Gail L. Gray
  • Process and catalyst for converting methane into higher hydrocarbon products
    Patent number: 5321188
    Abstract: Methane is converted into higher hydrocarbon products, and especially into ethane and ethylene, by oxidative coupling, by bringing a gaseous mixture containing methane and oxygen into contact at high temperature for a short contact time with a solid catalyst formed from lithium oxide, an alkaline earth metal oxide (preferably of magnesium) and a lanthanide oxide (preferably of neodymium or lanthanum), in which the lithium content is less than 0.20% by weight and the atomic ratio of the alkaline earth metal to the lanthanide varies from 0.8/1 to 8/1, said catalyst being obtained by:preparing a mixture of lithium, alkaline earth metal and lanthanide oxides in which the lithium content exceeds 1% by weight; andreducing the lithium content of the mixture to less than 0.20% by weight by high temperature thermal treatment conducted at least partly in an oxidizing atmosphere.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: June 14, 1994
    Assignees: Eniricerche S.p.A., Snamprogetti S.p.A.
    Inventors: Giuseppe Fornasari, Stefano Palmery, Giampiero Piro, Giuseppe Bellussi
  • Method for preparing unsaturated compounds
    Patent number: 5321186
    Abstract: A method for preparing an unsaturated compound mainly comprising monoolefins, or a mixture of .alpha., .beta.-unsaturated nitriles and monoolefins comprises coming a mixed gas which comprises paraffins and oxygen, or paraffins, oxygen and ammonia in contact with a catalyst which comprises (1) an oxide of phosphorus and (2) at least one oxide selected from the group consisting of indium oxide and tin oxide or comprises, in addition to the foregoing catalytic components, (3) at least one oxide selected from the group consisting of vanadium oxide, tungsten oxide and molybdenum oxide. The method makes it possible to prepare monoolefins, or a mixture of .alpha., .beta.-unsaturated nitriles and monoolefins in high yield and high selectivity from cheap starting materials, parafins.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: June 14, 1994
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadatoshi Honda, Kazuhiro Terada
  • Catalyst for the direct conversion of methane to higher hydrocarbons and method for the preparation of same
    Patent number: 5321187
    Abstract: A method for preparing a catalyst for conversion of methane to higher hydrocarbons, discloses the steps of: forming a mixture of a manganese aqueous solution and an oxidative agent aqueous solution in an inorganic oxide support material; varying a pH value of the mixture between acidic and basic values to obtain a precipitate of manganese oxide; drying the manganese oxide precipitate; impregnating the dried manganese oxide precipitate with a promoter to obtain an impregnated solid; drying the impregnated solid; and calcining the impregnated solid until a surface atomic ratio of promoter to manganese is at least 5. The catalyst so acquired may be contacted with a methane gas to obtain stable conversion values over extended reaction times.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: June 14, 1994
    Assignee: Intevep, S.A.
    Inventors: Cesar Ovalles, Nora Urbano, Francisco Rosa
  • Method of cracking polymeric materials catalyzed by copper
    Patent number: 5315055
    Abstract: The present invention is a method for depolymerizing or "cracking" polymeric materials. The method of the present invention may be used in the disposal and/or recycling of such materials. Products of the degradation of polymeric materials using the present method may be recycled or more easily treated for disposal.The present invention is a process for degrading, depolymerizing or "cracking" a polymeric material, otherwise amenable to cracking by alkali fusion, comprising the steps of:(a) preparing a molten reaction mixture comprising:(i) a basic material;(ii) a source of copper; and(iii) said polymeric material; and(b) maintaining said molten mixture at a temperature sufficient to reflux said molten mixture for sufficient time to depolymerize said polymeric material.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: May 24, 1994
    Assignee: Ohio University
    Inventor: Jared A. Butcher, Jr.
  • Hydrocarbon conversion
    Patent number: 5312795
    Abstract: A contact material composition containing an intimately mixed, mixed oxide of at least one cationic species of a naturally occurring Group IIIB element, at least one cationic species of a Group IIA metal of magnesium, calcium, strontium, and barium and at least one additional metal cationic species of zirconium and hafnium, as well as methods for hydrocarbon conversion using such contact material compositions are provided.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: May 17, 1994
    Assignee: Amoco Corporation
    Inventors: Mark P. Kaminsky, Mark S. Kleefisch, George A. Huff, Jr., Don M. Washecheck, Mark K. Barr
  • Process for reducing the fibrillation tendency of solvent-spun cellulose fibre
    Patent number: 5310424
    Abstract: A process is disclosed for providing a solvent-spun cellulose fiber with a reduced fibrillation tendency. The fiber is treated with a chemical reagent, preferably substantially colorless, having 2 to 6 functional groups reactive with cellulose, suitably dissolved in an aqueous solution.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: May 10, 1994
    Assignee: Courtaulds PLC
    Inventor: James M. Taylor
  • Packing adsorbent particles for storage of natural gas
    Patent number: 5308821
    Abstract: The ability of a packed bed of adsorbent to hold a gas is increased by employing at least two sizes of adsorbent particles having nominal diameters differing by at least 7/1. In a preferred embodiment, the capacity of a bed of carbon molecular sieve particles for adsorption of natural gas is significantly improved.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: May 3, 1994
    Assignee: Allied-Signal Inc.
    Inventor: Chin-Hsiung Chang
  • Cleaning, wetting agent and solvent
    Patent number: 5308550
    Abstract: The invention relates to compounds suitable for use as cleaning, wetting solvent agent which contains the active ingredients of dodcylbenzenesulfonic acid, ethoxylated nonyl phenol, lauric acid diethanolamide, diethanolamine and propylene glycol. The cleaning, wetting solvent agent forms a composition which exhibits non-hazardous properties and is biodegradable.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: May 3, 1994
    Assignee: Delta Omega Technologies, Ltd.
    Inventor: Edward E. Friloux
  • Oxidizing paraffin hydrocarbons
    Patent number: 5306858
    Abstract: Disclosed is a process for oxidizing a paraffin hydrocarbon containing 2 to 5 carbon atoms and no quaternary carbon atom to an olefin having the same number of carbon atoms as said paraffin by contacting said paraffin in a reaction zone with molecular oxygen and a VAPO-5 microporous molecular sieve as catalyst.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: April 26, 1994
    Assignee: The Standard Oil Company
    Inventors: George F. Salem, Charles J. Besecker, Susan M. Kenzig, Walter J. Kowlaski, Larry M. Cirjak
  • Process for olefin isomerization
    Patent number: 5304696
    Abstract: A process for the double bond isomerization of olefinic compounds is provided comprising contacting an olefinic compound and a sulfated zirconia catalyst.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: April 19, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Gyanesh P. Khare, Iqbal Ahmed
  • Cobalt-based catalyst and process for converting synthesis gas into hydrocarbons
    Patent number: 5302622
    Abstract: The invention relates to a process for the conversion of synthesis gases into a mixture of essentially linear and saturated hydrocarbons, characterized by the use of a catalyst prepared by a gelling procedure, incorporating cobalt, copper and ruthenium, the cobalt, copper and ruthenium being dispersed on a support having at least one oxide of a metal chosen from within the group formed by silica and alumina, the cobalt content, expressed by cobalt weight based on the catalyst weight, being between 1 and 60% by weight, the ruthenium content, expressed by ruthenium weight based on the cobalt weight, being between 0.1 and 20%, and the copper weight, expressed by copper weight based on the cobalt weight, being between 0.1 and 10%.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: April 12, 1994
    Assignee: Institut Francais Du Petrole
    Inventors: Patrick Chaumette, Catherine Verdon, Daniel Cruypelinck
  • Use of ultra-low sodium silica-aluminas in the alkylation of aromatics
    Patent number: 5302732
    Abstract: Silica-aluminas having a sodium content less than about 0.1 weight percent show increased stability when used as a catalyst for the alkylation of aromatic compounds. Where such silica-aluminas are used as the catalyst in detergent alkylation their increased stability permits continuous alkylation to be performed at lower temperatures, as a result of which the detergent alkylate product shows an incrementally higher linearity. Fluorided silica-aluminas having a sodium content of under 0.05 weight percent are particularly advantageous.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: April 12, 1994
    Assignee: UOP
    Inventors: Karl Z. Steigleder, Christine M. Conway, David M. Baldwin, Diane C. Dierking
  • Process of oxidizing aliphatic hydrocarbons employing a molybdate catalyst encapsulated in a hard, glassy silica matrix
    Patent number: 5302773
    Abstract: A process for preparing olefins and diolefins in high productivity which involves contacting an aliphatic hydrocarbon, such as butane, with a heterogeneous catalyst composition containing reactive oxygen under reaction conditions sufficient to produce a more highly unsaturated aliphatic hydrocarbon, such as 1,3-butadiene. The catalyst composition contains a glassy silica matrix of specified surface area and macro-porosity into which are encapsulated domains of a catalyst component containing oxides of magnesium and molybdenum. The catalyst has high crush strength and is useful in transport reactors.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: April 12, 1994
    Assignee: The Dow Chemical Company
    Inventors: G. Edwin Vrieland, Stephen J. Doktycz, Bijan Khazai
  • Olefin process with removal of aromatic by-products
    Patent number: 5300715
    Abstract: An improved process for the production of linear olefinic hydrocarbons by paraffin dehydrogenation and adsorptive separation is disclosed. Aromatic by-products normally formed in paraffin dehydrogenation are selectively removed using at least one aromatics removal zone. Removal of these aromatic by-products significantly increases the purity of the olefinic hydrocarbon product and increases the capacity of the adsorptive separation zone. The improved process is believed to increase the life of the adsorbent in the adsorptive separation zone and the life of the catalyst in the dehydrogenation zone.
    Type: Grant
    Filed: October 9, 1992
    Date of Patent: April 5, 1994
    Assignee: UOP
    Inventor: Bipin V. Vora