Patents Examined by Patrick P. Garvin
  • Patent number: 5324881
    Abstract: The alkylation of isoparaffin with olefin to provide alkylate is carried out in the presence of, as catalyst, a supported heteropoly acid. The support may be MCM-41, and the heteropoly acid may be dodecawolframophosphoric acid (i.e., phosphotungstic acid, i.e., H.sub.3 PW.sub.12 O.sub.40).
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: June 28, 1994
    Assignee: Mobil Oil Corp.
    Inventors: Charles T. Kresge, David O. Marler, Gayatri S. Rav, Brenda H. Rose
  • Patent number: 5324701
    Abstract: A catalyst active in the preparation of alternating olefin/carbon monoxide (CO) copolymers is constituted by:(a) Pd(O.sub.2 CNEt.sub.2).sub.2 (NHEt.sub.2).sub.2 supported on a solid carrier preferably constituted by hydroxylated silica,(b) an either mono- or bidentate ligand containing one or two nitrogen or phosphorous atoms capable of linking to Pd atom by dative bonds,(c) NOBF.sub.4.Disclosed are the preparation of the catalyst and the use of said catalyst in alternated copolymerization of ethylene (C2) and/or other olefins with carbon monoxide (CO).
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: June 28, 1994
    Assignee: Enichem S.P.A.
    Inventors: Anna Sommazzi, Gabriele Lugli, Fabio Garbassi, Fausto Calderazzo, Daniela Belli Dell'Amico
  • Patent number: 5324697
    Abstract: A novel Phillips catalyst for the homopolymerization of ethylene and the copolymerization of ethylene with .alpha.-olefins contains as catalytically active components a specific chromium catalyst on an aluminum phosphate support and cocatalysts of the formula I to IV, ##STR1## where M is lithium, sodium and potassium,M.sup.1 is magnesium and zinc,M.sup.2 is boron and aluminum,R is C.sub.1 -C.sub.10 -alkyl and C.sub.6 -C.sub.20 -aryl,R.sup.1 is R and C.sub.1 -C.sub.10 -alkoxy and C.sub.6 -C.sub.20 -aryloxy,X is chlorine, bromine and iodine,n is 0, 1 and 2The chromium catalyst on an aluminum phosphate support can be obtained by applying chromium compounds to a finely divided aluminum phosphate with a P:A1 molar ratio near to or equal to 1 and a pore volume of >1 cm.sup.3 /g and activating the resulting intermediate at elevated temperatures in an oxidizing atmosphere. The novel Phillips catalyst has an exceptionally long duration of activity and its productivity can be increased further by adding hydrogen.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: June 28, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Joachim Mueller, Rainer Konrad, Guenther Schweier, Siegfried Weber, Roland Saive, Peter Koelle
  • Patent number: 5322830
    Abstract: The invention relates to a method for the preparation of a supported procatalyst intended for the polymerization of olefins, in which particles are formed from magnesium halide and alcohol, the particles are reacted with an organometallic compound of any of the metals of the groups I to III, the thus obtained particulate product is activated by means of a titanium(IV) compound, and optionally a prepolymerization is carried out for the activated particles. A problem with this kind of a method is, how to form particles from magnesium dihalide and alcohol having an advantageous structure for the polymerization of ethylene and particularly ethylene with a narrow molecular weight distribution. The problem has in the present invention been solved so that the particles are formed by spray-crystallizing a mixture of magnesium dihalide and alcohol to complex particles of magnesium dihalide and alcohol and that titanium(IV) alcoxyhalide has been used as the titanium compound.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: June 21, 1994
    Assignee: Neste Oy
    Inventors: Pekka Sormunen, Jukka Koskinen, Paivi Waldvogel
  • Patent number: 5320995
    Abstract: A catalyst for the polymerization of olefins, containing magnesium, chlorine, aluminium and at least one transition metal, in a dispersed or emulsified form within an inert diluent, is obtained by:contacting, in an inert diluent, a magnesium dialkyl and aluminium trichloride, in a molar ratio equal or almost equal to 2/1, at a temperature lower than C. to obtain a catalyst precursor in a suspended form, or at a temperature higher than C. to form a catalyst precursor in the form of a colloidal emulsion, in the diluent used; andcontacting said suspended or emulsified precursor with at least one compound of a transition metal to form a catalyst in the form of a suspension or emulsion respectively.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: June 14, 1994
    Assignee: ECP Enichem Polimeri S.r.l.
    Inventors: Luciano Luciani, Mario Polesello, Federico Milani, Renzo Invernizzi, Giovanni Soverini
  • 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
  • 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
  • Patent number: 5321106
    Abstract: Addition polymerization catalysts comprising a derivative of a Group 4 or Lanthanide metal compound prepared by oxidative activation, a process for preparation and an addition polymerization method utilizing such catalysts.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: June 14, 1994
    Assignee: The Dow Chemical Company
    Inventor: Robert E. LaPointe
  • 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
  • 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
  • Patent number: 5320997
    Abstract: An appliance for sterilizing contact lenses or the like includes a reaction vessel for containing the lenses in sterilizing contact with hydrogen peroxide solution and two catalytic elements for decomposing the hydrogen peroxide during the lens sterilization. The first catalytic element decomposes a portion of the initial concentration of hydrogen peroxide in the solution during the lens sterilization, and the second catalytic element accelerates combined decomposition of the reduced concentration of hydrogen peroxide in the solution resulting from decomposition by the first catalytic element, in order to achieve sufficiently reduced terminal hydrogen peroxide concentration at completion of the lens sterilization for safe contact by the eyes of a wearer with residues of hydrogen peroxide at the terminal concentration which may adhere to the sterilized lenses.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: June 14, 1994
    Assignee: Ciba Vision Corporation
    Inventor: Steven C. Perlaky
  • Patent number: 5321189
    Abstract: A process for propene oligomerization catalyzed by transition metal complexes in liquid phase to give propene oligomers with a high content of terminal double bonds, comprises oligomerizing propene in the presence of a catalyst of the formula ICp.sub.2 MX.sub.2 Iwhere Cp is an unsubstituted cyclopentadienyl unit and/or a mono-C.sub.1 -C.sub.4 -alkylcyclopentadienyl unit, M is zirconium or hafnium and the ligands X are each hydride and/or halide and/or methyl, and in the presence of an aluminoxane cocatalyst, and where the ratio of the amounts of the catalyst I and the aluminoxane cocatalyst is such that the M/Al atomic ratio is from 1:250 to 1:1000, employing a temperature of from to C. and a pressure of from 30 to 100 bar.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: June 14, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Joachim Mueller, Bernd L. Marczinke, Juergen Kerth, Rainer Konrad, Guenther Schweier, Max Strohmeyer, Bernhard Rieger
  • 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
  • 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
  • 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
  • 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, 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
  • Patent number: 5318935
    Abstract: Certain bridged and unbridged amido transition metal compounds of the Group IV-B metals are disclosed. These compounds may be used in a catalyst system comprising the amido transition metal compound and an alumoxane. Also disclosed is a process using the catalyst system for the production of high molecular weight polyolefins and, particularly, high molecular weight isotactic polypropylene.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: June 7, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Jo Ann M. Canich, Howard W. Turner
  • Patent number: 5316990
    Abstract: An improved catalyst material is derived from a precious metal-containing macrocyclic compound precursor, which contains precious metal in zero oxidation state. The material may be produced by activating the compound, for example by a voltage sweep. The material offers useful improvements in activity and resistance to de-activation, when used as a fuel cell catalyst.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: May 31, 1994
    Assignee: Johnson Matthey Public Limited Company
    Inventors: Susan J. Cooper, Graham A. Hards, David Thompsett
  • Patent number: 5316994
    Abstract: An improved olefin metathesis catalyst system is disclosed. The catalyst system comprises a transition metal halide metathesis catalyst and an organo transition metal hydride co-catalyst of the formulaR.sub.x '--Cu--HThe copper hydride co-catalyst of this invention has the general formula R.sub.x '--Cu--H wherein R' is a complexing ligand preferably an organically substituted phosphine, and x is 1 or 2. The organic substituents on the phosphine group are optionally substituted C.sub.1-20 hydrocarbons, such as C.sub.1-20 alkyls or alkenyls, C.sub.3-20 cycloalkyls or cycloalkenyls having 3 to 8 carbon atoms in the ring, or optionally substituted C.sub.6-20 aryl or fused aryl. The optional substituents on the hydrocarbons include halogens, preferably chloride and fluoride; C.sub.1-6 alkyl; C.sub.1-6 alkenyl; or C.sub.1-6 alkoxy.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: May 31, 1994
    Assignee: Shell Oil Company
    Inventor: Donald R. Kelsey
  • 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.