Saturated Compound Synthesis Patents (Class 585/700)
  • Publication number: 20020035305
    Abstract: A catalyst for producing higher carbon number hydrocarbons, e.g., benzene from low carbon number hydrocarbons such as methane has been developed. The catalyst comprises a porous support such as ZSM-5 which has dispersed thereon rhenium and a promoter metal such as iron, cobalt, vanadium, manganese, molybdenum, tungsten and mixtures thereof. A process for preparing the catalyst and a process for converting low carbon number aliphatic hydrocarbons to higher number hydrocarbons in the presence of CO or CO2 at conversion conditions are also described.
    Type: Application
    Filed: September 27, 2001
    Publication date: March 21, 2002
    Inventors: Masaru Ichikawa, Ryuichiro Ohnishi, Linsheng Wang
  • Patent number: 6359018
    Abstract: An integrated process for producing a liquid hydrocarbon stream from Fischer-Tropsch hydrocarbon product without having to remove particulate contaminants such as catalyst fines from hot Fischer-Tropsch wax is disclosed. The process involves performing Fischer-Tropsch synthesis, preferably under conditions which favor formation of wax and heavy products (i.e., using a catalyst with high chain growth probabilities), and obtaining a waxy heavy fraction including particulate contaminants. The fraction is subjected to hydroprocessing conditions, preferably upflow hydroprocessing conditions, using a catalyst bed which, through judicious selection of hydroprocessing catalysts and/or flow conditions, permits passage of the particulate contaminants. The particulates are then removed from the upgraded liquid product, for example by filtration, distillation and/or centrifugation.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: March 19, 2002
    Assignee: Chevron U.S.A. Inc
    Inventors: Dennis J. O'Rear, Krishniah Parimi, Richard O. Moore, Jr.
  • Patent number: 6326407
    Abstract: A method of transforming a normally gaseous composition consisting essentially of methane into a material comprising a major portion, at least, of hydrocarbons containing at least two carbon atoms; the method comprising the steps of feeding the composition into a reactor including a first electrode means, a second electrode means and at least one layer of a normally solid dielectric material positioned between the first and the second electrode means; submitting the composition within the reactor in the presence of a normally solid catalyst to a dielectric barrier discharge; and controlling the dielectric barrier discharge to convert the normally gaseous composition into the material comprising a major portion, at least, of the hydrocarbons containing at least two carbon atoms.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: December 4, 2001
    Assignee: ABB Research Ltd.
    Inventors: Baldur Eliasson, Chang-Jun Liu, Eric Killer
  • Patent number: 6281378
    Abstract: Vanadium-containing catalysts are obtained by using polyvanadic acid as a source of vanadium. Vanadium-containing catalysts are obtained by mixing catalyst components other than vanadium, or their precursors, with a polyvanadic acid sol which is formed by ion-exchanging a metavanadic acid aqueous solution with a proton-type cation-exchange resin and performing polycondensation, and by drying and/or calcining the mixture.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: August 28, 2001
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Nobuji Kishimoto, Etsushige Matsunami
  • Publication number: 20010014765
    Abstract: There are disclosed a process for producing a solid catalyst component and a catalyst for &agr;-olefin polymerization, and a process for producing an &agr;-olefin polymer, wherein the process for producing a solid catalyst component comprises the steps of:
    Type: Application
    Filed: February 2, 2001
    Publication date: August 16, 2001
    Inventors: Yasuki Fujiwara, Makoto Satoh
  • Patent number: 6271432
    Abstract: Cobalt catalysts, and processes employing these inventive catalysts, for hydrocarbon synthesis. The inventive catalyst comprises cobalt on an alumina support and is not promoted with any noble or near noble metals. In one aspect of the invention, the alumina support preferably includes a dopant in an amount effective for increasing the activity of the inventive catalyst. The dopant is preferably a titanium dopant. In another aspect of the invention, the cobalt catalyst is preferably reduced in the presence of hydrogen at a water vapor partial pressure effective to increase the activity of the cobalt catalyst for hydrocarbon synthesis. The water vapor partial pressure is preferably in the range of from 0 to about 0.1 atmospheres.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: August 7, 2001
    Assignee: Energy International
    Inventors: Alan H. Singleton, Rachid Oukaci, James G. Goodwin
  • Patent number: 6265630
    Abstract: A process for the disproportionation of pentane to alkanes containing fewer carbon atoms per molecule and alkanes containing more atoms per molecule in the presence of a catalyst composition containing hydrogen fluoride (HF), titanium tetrafluoride (TiF4) and sulfolane.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: July 24, 2001
    Assignee: Phillips Petroleum Company
    Inventors: Bruce B. Randolph, Marvin M. Johnson
  • Publication number: 20010003787
    Abstract: Cobalt catalysts, and processes employing these inventive catalysts, for hydrocarbon synthesis. The inventive catalyst comprises cobalt on an alumina support and is not promoted with any noble or near noble metals. In one aspect of the invention, the alumina support preferably includes a dopant in an amount effective for increasing the activity of the inventive catalyst. The dopant is preferably a titanium dopant. In another aspect of the invention, the cobalt catalyst is preferably reduced in the presence of hydrogen at a water vapor partial pressure effective to increase the activity of the cobalt catalyst for hydrocarbon synthesis. The water vapor partial pressure is preferably in the range of from 0 to about 0.1 atmospheres.
    Type: Application
    Filed: December 20, 2000
    Publication date: June 14, 2001
    Applicant: Energy International Corporation
    Inventors: Alan H. Singleton, Rachid Oukaci, James G. Goodwin
  • Patent number: 6235962
    Abstract: A catalyst for ring opening of cyclic organic compounds comprising, on a carrier of alumina, silica, zirconia and mixtures thereof, from 0.1 to 10% by weight based on the total weight of the catalyst of a catalytic active metal selected from platinum, palladium, rhodium, rhenium, iridium, ruthenium, nickel, cobalt and mixtures or combinations thereof and from 0.01 to 20% by weight based on the total weight of the catalyst of a metal modifier selected from tungsten, molybdenum lanthanum and rare earth metals and mixtures and combinations thereof.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: May 22, 2001
    Assignee: Haldor Topsoe A/S
    Inventor: Per Zeuthen
  • Patent number: 6225359
    Abstract: Salable hydrocarbon products prepared by reacting a light hydrocarbon gaseous stream with a gaseous oxidant to produce carbon oxides and hydrogen, which is contacted in a hydrocarbon synthesis zone to produce a product stream comprising salable hydrocarbon products. That product stream is separated into a gaseous fraction and at least one fraction of salable hydrocarbon products. The light hydrocarbon gaseous stream is formed by separating a light hydrocarbon gaseous feed comprising alkanes into a lighter fraction and a heavier fraction and contacting that heavier fraction in a disproportionation zone to convert a significant portion of the alkanes in the heavier fraction by disproportionation into both higher and lower alkanes, then at least part of the lighter fraction and the lower alkanes form the light hydrocarbon gaseous stream.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 1, 2001
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis John O'Rear, Charles L. Kibby, Russell R. Krug
  • Patent number: 6144897
    Abstract: A control method for a process of synthesis of at least one chemical product in an equipment comprising at least one reactor (R) which is assimilated to a mixed reactor, in which manipulated variables (GC) allow to act on the course of the process in order to make one or more variables related to the properties of the product and/or to the running of the process, which are called controlled variables (GR).
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: November 7, 2000
    Assignee: Solvay Polyolefins Europe-Belgium (Societe Anonyme)
    Inventor: Jacques De Selliers
  • Patent number: 6132695
    Abstract: A process of preparing a Group IV, V, or VI metal carbonitride including reacting a Group IV, V, or VI metal amide complex with ammonia to obtain an intermediate product; and, heating the intermediate product to temperatures and for times sufficient to form a Group IV, V, or VI metal carbonitride is provided together with the product of the process and a process of reforming an n-alkane by use of the product.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: October 17, 2000
    Assignee: The Regents of the University of California
    Inventors: Joseph Barrera, David C. Smith
  • Patent number: 6045688
    Abstract: The invention relates ro a method of converting hydrocarbons. According to the method, a gaseous or liquid hydrocarbon feed is passed into a circulating fluidized-bed reactor, wherein the feed is converted at a high temperatue under the influence of particulate matter kept in a fluidized state, and the converted hydrocarbon products are removed from the reactor in a gaseous phase. According to the invention, a circulating fluidized-bed reactor (1-3; 41-43) is used having an axially annular cross section and being equipped with a multiport cyclone (14,17; 52,63) for the separation of the particulate matter from the gas-phase reaction products. The reaction space comprises an intershell riser space (13; 50) formed between two concentrically located cylindrical and/or conical envelope surfaces. The separation of particulate matter from the gas-phase reaction products is performed by means of a multiport cyclone equipped with louvered vanes (14; 63).
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: April 4, 2000
    Assignee: Neste OY
    Inventors: Seppo Ruottu, Kari Kaariainen, Jyrki Hiltunen
  • Patent number: 5958370
    Abstract: The present invention relates to new crystalline zeolite SSZ-39 prepared using a cyclic or polycyclic quaternary ammonium cation templating agent.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: September 28, 1999
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stacey I. Zones, Yumi Nakagawa, Susan T. Evans, Gregory S. Lee
  • Patent number: 5877387
    Abstract: A preparation of a Pb-substituted hydroxyapatite catalyst for oxidative coupling of methane represented by the formula Ca.sub.10-x pb.sub.x (PO.sub.4).sub.6 (OH).sub.2 wherein 0<X<10 or preferably 0<X<3, includes dissolving calcium nitrate tetrahydrate ?Ca(NO.sub.3).sub.2 4H.sub.2 O!, lead nitrate ?Pb(NO.sub.3).sub.2 ! and monobasic ammonium phosphate ?NH.sub.4 H.sub.2 PO.sub.4 ! in a distilled water at room temperature to have over 0.01M concentration and pH 9 and maintaining a resultant precipitate for 5 to 20 hours for aging and then calcining the resultant. A method for producing C.sub.2 compounds using the thusly produced catalyst includes reacting a mixed gas composed of methane, oxygen and helium in the presence of 5.about.20 g.multidot.min/L of the Pb-substituted hydroxyapatite catalyst according to the present invention, at a high temperature of at least 600.degree. C.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: March 2, 1999
    Assignee: Korea Institute of Science and Technology
    Inventors: Tae-Jin Park, Dong Jin Suh, Kwan-Young Lee
  • Patent number: 5849973
    Abstract: A catalyst for oxidative coupling of methane comprising Fe.sub.2 O.sub.3 deposited on a silica substrate, said silica substrate having particle sizes in the range of about 150 to 215 .mu.m, and a method for producing said catalyst in which particles of Fe.sub.2 O.sub.3, with a particle size in the range from 100 to 150 .mu.m, and particles of silica, with a particle size in the range from about 150 to about 215 .mu.m are mixed together. The particles are heated to a temperature of at least about 800.degree. C., after which the silica particles impregnated with Fe.sub.2 O.sub.3 are separated from the remaining iron particles.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: December 15, 1998
    Assignee: Gas Research Institute
    Inventor: Donald R. Van Der Vaart
  • Patent number: 5811624
    Abstract: A process for opening C.sub.5 and C.sub.6 rings without substantial cracking. A feedstream containing compounds comprised of at least one C.sub.5 -ring, at least one C.sub.6 -ring, or both, is contacted, in the presence of hydrogen, with a transition metal catalyst selected from the group consisting of carbides, nitrides, oxycarbides, oxynitrides, and oxycarbonitrides. The transition metal is selected from the group consisting of metals from Groups IVa, Va, and VIa of the Periodic Table of the Elements.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: September 22, 1998
    Assignee: Exxon Research and Engineering Company
    Inventors: Sylvain Hantzer, Michele S. Touvelle, Jingguang G. Chen
  • Patent number: 5783607
    Abstract: The invention concerns the preparation of a catalyst comprising a support comprising at least one oxide of the element Si, Al, Ti, Zr, Sn, Zn, Mg or Ln (where Ln is a rare earth), cobalt, titanium, at least one element A selected from the group formed by copper, ruthenium, platinum, palladium, scandium and yttrium, and characterized in that it comprises at least the following successive steps:(1) forming a precursor comprising at least cobalt, element A and the support;(2) at least partial reduction of said precursor in the presence of at least one reducing compound; and(3) depositing titanium on the reduced precursor.The invention also concerns the catalyst which can be produced using this process and the use of the catalyst in a process for synthesizing C.sub.5.sup.+ hydrocarbons from synthesis gas.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: July 21, 1998
    Assignees: Institut Francais du Petrole, AGIP Petroli S.p.A.
    Inventors: Patrick Chaumette, Olivier Clause, Hedi Azib
  • Patent number: 5770042
    Abstract: A process combination is disclosed to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. A naphtha feedstock is subjected to ring cleavage to convert naphthenes to paraffins using a nonacidic catalyst followed by isomerization of paraffins to obtain an increased proportion of isoparaffins. Ring cleavage also may be effected on the product of isomerization and separation by fractionation or adsorption.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: June 23, 1998
    Assignee: UOP
    Inventors: Leonid B. Galperin, Jeffery C. Bricker, Jennifer S. Holmgren
  • Patent number: 5744667
    Abstract: Gasoline range olefins such as trimethyl pentene are saturated to the corresponding paraffins such as trimethylpentane by hydrogen transfer from lower molecular weight paraffins using a catalyst comprising platinum supported on a large pore borosilicate zeolite which has been partially neutralized by the addition of alkali cations.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: April 28, 1998
    Assignee: Texaco Inc.
    Inventor: Regis J. Pellet
  • Patent number: 5728911
    Abstract: A copolymer having an RSV less than 0.6 and a process for its preparation in which ethylene, at least one other 1-alkene and, optionally, an aliphatic or alicyclic polyunsaturated monomer are polymerized in the presence of a catalyst system containing (1) a compound of vanadium, (2) at least one alkyl aluminum halide, (3) an .alpha.-halo, ketoaromatic promoter and (4) a chain transfer agent in which the molar ratio of alkyl groups of the alkyl aluminum halide to halogen atoms is at least 1.5.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: March 17, 1998
    Assignee: DSM Copolymer, Inc.
    Inventor: James R. Hall
  • Patent number: 5728909
    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: February 14, 1994
    Date of Patent: March 17, 1998
    Assignee: Ohio University
    Inventor: Jared A. Butcher, Jr.
  • Patent number: 5565616
    Abstract: Production of alkanes from an alkyl bound to a heteroatom under controlled hydrothermal conditions at supercritical or near critical water conditions including the use of an additive. The method reduces the extent of oxidation, generates useful and recoverable products, alters product distributions, promotes product yield, and enhances reaction rates. Additives alter product distributions and neutralize or consume mineral acids.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: October 15, 1996
    Assignee: Board of Regents, The University of Texas System
    Inventors: Lixiong Li, Earnest F. Gloyna, Jacqueline K. McKendry
  • Patent number: 5527978
    Abstract: Methane is converted into higher hydrocarbon products by oxidative coupling, by bringing a gaseous mixture containing methane and oxygen into contact with a solid catalyst formed from calcium oxide, magnesium oxide, a lanthanide oxide plus possibly lithium oxide, wherein:the lithium content is between 0 and 0.20 wt %,the calcium/magnesium atomic ratio is between 0.08 and 0.7, andthe (calcium+magnesium)/lanthanide atomic ratio is between 0.8/1 and 8/1, and preferably between 2/1 and 4/1.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: June 18, 1996
    Assignee: Eniricerche S.p.A.
    Inventors: Giuseppe Fornasari, Giuseppe Bellussi
  • Patent number: 5487848
    Abstract: Processes for preparing a polymerization initiator precursor compound are disclosed wherein a first process involves dimerizing a halogen-diarylpropane compound to form a tetraarylhexane compound. A second process involves reacting a diaryl-propanol compound with a halogen-diarylpropane compound to form a bis(diaryl-propyl) ether compound. A third process involves reacting a halogen-diarylpropane compound with allyl halogen to form a diaryl-hexene compound.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: January 30, 1996
    Assignee: Xerox Corporation
    Inventor: Timothy J. Fuller
  • Patent number: 5463155
    Abstract: A process combination is disclosed to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. A naphtha feedstock is subjected to ring cleavage to convert naphthenes to paraffins using a nonacidic catalyst followed by isomerization of paraffins to obtain an increased proportion of isoparaffins.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: October 31, 1995
    Assignee: UOP
    Inventors: Leonid B. Galperin, Jeffery C. Bricker, Jennifer S. Holmgren
  • Patent number: 5414176
    Abstract: The invention relates to a method for converting methane into higher hydrocarbons. According to the invention, a catalyst comprised essentially of a metal belonging to the series of transition metals and of a carrier which is comprised particularly of a refractory metal oxide is subjected to a methane flow at a temperature comprised between 100.degree. C. and 300.degree. C. approximately, with a contact time of at least one second, and to a hydrogen flow at a temperature comprised between 100.degree. C. and 300.degree. C. with a contact time of at least one second. The method of the invention is particularly usable in chemical engineering.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: May 9, 1995
    Assignee: Gaz de France
    Inventors: Henri Amariglio, Jacques J. Saint Just
  • Patent number: 5406017
    Abstract: A method for converting methane to higher hydrocarbon products and coproduct water wherein a gas comprising methane and a gaseous oxidant are contacted with a nonacidic catalyst at temperatures within the range of about 700.degree. to 1200.degree. C. A preferred catalyst comprises an alkali component associated with a support material. Results obtained over alkali-promoted solids are enhanced when the contacting is conducted in the presence of halogen promoters.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: April 11, 1995
    Assignee: Atlantic Richfield Company
    Inventor: Howard P. Withers, Jr.
  • Patent number: 5382731
    Abstract: There is provided a process for ring opening of aromatics or cycloaliphatics, as well as isomerization of aliphatics. The feedstream to this process comprises hydrocarbons having 6 carbon atoms. The process involves the use of a recycle stream containing a source of chlorine, such as carbon tetrachloride, and this process involves the use of at least two reactors connected in series. The first reactor comprises a ring opening catalyst and is operated under conditions which particularly promote ring opening. The catalyst in this first reactor may comprise zirconia modified with tungstate and platinum. A second, downstream reactor is operated under conditions to promote isomerization of aliphatics. The catalyst in the second reactor may comprise alumina, platinum and a chloride component. The catalysts in both the first and second reactors are chlorine resistant.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: January 17, 1995
    Assignee: Mobil Oil Corp.
    Inventors: Clarence D. Chang, Roy D. Bastian, Scott Han, Jose G. Santiesteban
  • Patent number: 5354936
    Abstract: A method for preparing ethane and ethylene by reacting methane or a methane-containing natural gas in the presence of oxygen or an oxygen-containing gas, i.e., by partially oxidizing, at a temperature of 500.degree. through 1000.degree. C. using shellfishes or shells as a catalyst is disclosed. The oxidation coupling reaction of methane is controlled so as to remarkably increase the conversion ratio of methane and the selectivity of C.sub.2.sup.+ compounds. The waste matter abundantly released from food industries as well as easily accessible natural resources is used as a raw material of a catalyst for the reaction. The present method is extremely useful from the viewpoint of the recycling of waste as well.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: October 11, 1994
    Assignee: Sekiyushigen Kaihatsu Kabushiki Kaisha
    Inventors: Masami Yamamura, Hideo Okado, Naohide Tsuzuki, Kazutoshi Chaki, Toshiya Wakatsuki
  • Patent number: 5345026
    Abstract: There is provided a ring opening process using a catalyst comprising a hydrogenation/dehydrogenation component, such as a noble metal, and an acidic solid component comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. An example of this catalyst is zirconia, modified with tungstate and platinum. This catalyst is used to convert cyclic hydrocarbons, such as cyclohexane and benzene, to paraffins, especially branched paraffins.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: September 6, 1994
    Assignee: Mobil Oil Corp.
    Inventors: Clarence D. Chang, Jose G. Santiesteban, David L. Stern
  • Patent number: 5336826
    Abstract: Higher hydrocarbons are produced from methane by reacting the methane at elevated temperature, suitably in the range from 600.degree. to 800.degree. C., with an oxygen-containing gas having a ratio of methane to oxygen of greater than the stoichiometric ratio for complete combustion in the presence as catalyst of a lithium-doped material which under the reaction conditions is a physically base-stable, non-melting, oxygen-stable compound of an element of Groups III to VIII of the Periodic Table of the Elements including the rare earth elements.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: August 9, 1994
    Assignee: The British Petroleum Company p.l.c.
    Inventors: John H. Brophy, Steven R. Wade
  • 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: 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: 5321185
    Abstract: A method of producing an oxidative coupling catalyst is disclosed by mixing particles of Fe.sub.2 O.sub.3, with a particle size in the range from 100 to 150 .mu.m, and silica, with a particle size in the range from about 150 to about 215 .mu.m. The particles are heated to a temperature of at least about 800.degree. C., after which the silica particles impregnated with Fe.sub.2 O.sub.3 are separated from the remaining iron particles. The catalyst can be utilized for the oxidative coupling of methane with water molecules on the surface of the silica substrate, with the silica having a particle size in the range from about 150 to about 215.ltoreq..mu.m. The silicate catalyst substrate is essentially non-porous and has an average geometrical surface on the order of about 0.004 .mu.m.sup.2 /g and a surface concentration of iron on the order of about 2% by weight.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: June 14, 1994
    Assignee: Virginia Tech Intellectual Properties
    Inventor: Donald R. van der Vaart
  • 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: 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.
  • 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
  • Patent number: 5288935
    Abstract: The invention concerns a method of producing liquid hydrocarbons from natural gas, characterized in that:a) the natural gas is separated in (2) into at least two fractions, a first fraction of gas enriched with methane and a second fraction enriched with C2+ alkanesb) the methane is selectively oxidised in (7a) by molecular oxygen in the presence of a catalyst for oxidizing linkage of methanec) the fraction enriched with C2+ alkanes is at least partly mixed with the effluent from selective oxidation, when at least 80% of the molecular oxygen introduced at stage (b) has already been consumed at stage (b)d) the mixture resulting from stage (c) is pyrolysed in (7b)e) when the temperature of the mixture from stage (d) has been brought to a temperature from 300.degree. to 750.degree. C. and more particularly from 420.degree. to 550.degree. C.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: February 22, 1994
    Assignee: Institut Francais du Petrole
    Inventors: Fabio Alario, Charles Cameron, Jean-Francois Joly
  • Patent number: 5276237
    Abstract: A membrane of an oxidative conversion contact material of a mixed oxide of aluminum and at least one multivalent activator metal with the membrane permitting selective conveyance of a form of oxygen therethrough, as well as methods for the oxidative conversion of a gaseous hydrocarbon reactant using such membranes are provided.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: January 4, 1994
    Assignee: Amoco Corporation
    Inventor: Rodney L. Mieville
  • Patent number: 5276241
    Abstract: Barium peroxide oxidizer, together with a transition metal from Group I, III, IV, V, VII or VIII or compound thereof is used as stoichiometric reagent in the oxidative dimerization of hydrocarbons having three or four carbon atoms. Barium peroxide oxidizer, together with a transition metal from Group I, III, IV, V, VI, VII or VIII or compound thereof is used as stoichiometric reagent in the dehydrogenation of hydrocarbons having three or four carbon atoms.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: January 4, 1994
    Assignee: Sun Company, Inc. (R&M)
    Inventors: Vincent A. Durante, James E. Lyons
  • Patent number: 5254778
    Abstract: An improved method for preparing a catalyst which is superior for converting methane to ethane and ethylene is described. The method involves mixing a solution of a magnesium alkoxide in alcohol with a solution of a lithium compound in alcohol. Preferably, chlorine is introduced into the mixture. A solution of an aluminum alkoxide in an alcohol may also be added to the mixture. The magnesium alkoxide is hydrolyzed to produce a gel, and the gel is then calcined to produce the catalyst. Catalysts prepared by this method are superior for converting methane to ethane and ethylene, and have superior selectivities for ethylene and ethane over conventional lithium carbonate/magnesium oxide catalysts.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: October 19, 1993
    Assignee: The Texas A & M University System
    Inventors: Jack H. Lunsford, Paul G. Hinson
  • Patent number: 5254761
    Abstract: A reducible unsaturated organic compound is reduced with diimide in an aqueous emulsion comprised of water, an organic phase which contains the compound to be reduced, and an effective stabilizing amount of an anionic surfactant. The organic compound is preferably an unsaturated organic compound containing a carbon-to-carbon multiple bond, which is preferably a carbon-to-carbon double bond. Diimide is formed by reaction of hydrazine with an oxidant in the aqueous emulsion described above. The preferred oxidant is hydrogen peroxide. A product is obtained in high yield and purity in most cases. This process is especially useful for the selective reduction of a compound having two or more carbon-to-carbon double bonds of different reactivities or a carbon-to-carbon double bond and a functionality (e.g., an O--O or S--S linkage) which is reducible by catalytic hydrogenation but not diimide.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: October 19, 1993
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Dane K. Parker
  • Patent number: 5245109
    Abstract: A contact material composition of an intimately mixed halogencontaining 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 cationic species of germanium and gallium, as well as methods for hydrocarbon conversion using such contact material compositions are provided.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: September 14, 1993
    Assignee: Amoco Corporation
    Inventors: Mark P. Kaminsky, Mark S. Kleefisch, George A. Huff, Jr., Don M. Washecheck, Mark K. Barr
  • Patent number: 5227568
    Abstract: A process of hydrodechlorination of effluents originating from the preparation of hydrocarbon resins is described, the effluents consisting of about 90% of unconverted monomers and containing between 600 and 2500 ppm of organic chlorine. Said hydrodechlorination process comprises subjecting the said effluents to hydrogenation at a temperature of between 200.degree. and 300.degree. C. in the presence of a catalyst, preferably consisting of Ni-Mo supported on .gamma.-Al.sub.2 O.sub.3.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: July 13, 1993
    Assignee: Enimont Anic S.r.l.
    Inventors: Gianfranco Biddau, Oscar Cappellazzo, Sergio E. Lai, Giuseppe Messina
  • Patent number: 5227552
    Abstract: The present invention provides a process for producing a selected paraffin from a reaction mixture containing(i) an acceptor olefin having the carbon backbone structure of said selected paraffin;(ii) a donor paraffin having a carbon backbone structure different from that of said selected paraffin;(iii) less than about 10 mole percent molecular hydrogen; which process comprises the steps of contacting said reaction mixture with a heterogeneous catalyst comprising active carbon in the absence of an added catalytic metal or metal compound to convert at least a portion of said acceptor olefin to said selected paraffin and to dehydrogenate at least a portion of said donor paraffin.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: July 13, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Clarence D. Chang, Stuart D. Hellring, Randy F. Striebel
  • Patent number: 5220086
    Abstract: The invention relates to the treatment of crystals of ZSM-5 with mineral acid to produce ZSM-5 crystals which have an acid activity associated with the pores and channels thereof, the shape selective portion of the crystal, which is greater than the acid activity of the non-shape selective portion of the crystal or the surface of the ZSM-5 crystal, and the effect of the treated zeolite, as a catalyst component, in catalytic hydrocarbon conversions.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: June 15, 1993
    Assignee: Mobil Oil Corporation
    Inventor: Paul G. Rodewald
  • Patent number: 5214226
    Abstract: The present invention teaches an apparatus and method for commercial conversion of methane in the absence of a catalyst to higher hydrocarbons that are generally in short supply, e.g., butane, ethylene, propene, etc. The production of these higher molecular weight hydrocarbons aids in justifying the cost of the conversion process. The inventive conversion technique utilizes small amounts, generally 1% or less, of a low-cost initiator, plus air, which allows for the commercial viability of the process.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: May 25, 1993
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Simon H. Bauer, Huy-Zu Cheng
  • Patent number: 5210357
    Abstract: A solid composition of matter selected from the group consisting of:(a) a component comprising: (1) an oxide of lanthanum and a component comprising: (2) at least one material selected from the group consisting of halogen ions, compounds containing halogen ions, tin and compounds containing tin; and(b) a component comprising: (1) at least one material selected from the group consisting of Group IA metals and compounds containing said metals, a component comprising: (2) at least one metal selected from the group consisting of lanthanum and compounds containing lanthanum and, optionally, a component comprising: (3) at least one material selected from the group consisting of halogen ions, compounds containing halogen ions, tin and compounds containing tin,and a method for the oxidative conversion of organic compounds to other organic compounds, particularly in the presence of a free oxygen containing gas.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: May 11, 1993
    Assignees: Phillips Petroleum Company, Atlantic Richfield Company
    Inventors: John H. Kolts, James B. Kimble
  • Patent number: 5198596
    Abstract: A contact material composition containing an intimately mixed, mixed oxide of at least one cationic species of a naturally occurring Group 111B elment, 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: October 11, 1991
    Date of Patent: March 30, 1993
    Assignee: Amoco Corporation
    Inventors: Mark P. Kaminsky, Mark S. Kleefisch, George A. Huff, Jr., Don M. Washecheck, Mark K. Barr