Diverse Metals Bonded To Carbon Patents (Class 502/153)
  • Patent number: 6162935
    Abstract: Ansa bis(.mu.-substituted) Group 4 metal and aluminum compounds comprising a single Group 4 metal atom and two aluminum metal atoms corresponding to the formula: ##STR1## wherein: L' is a .pi.-bonded group,M is a Group 4 metal,Z is a divalent bridging group causing the complex to have an ansa structure,X independently each occurrence is a Lewis basic ligand group able to form a .mu.-bridging ligand group, and optionally the two X groups may be joined together, andA' independently each occurrence is an aluminum containing Lewis acid compound that forms an adduct with the metal complex by means of the .mu.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: December 19, 2000
    Assignee: The Dow Chemical Company
    Inventor: Eugene Y. Chen
  • Patent number: 6160145
    Abstract: Novel, highly effective catalyst compositions are described in which a low cost co-catalyst can be employed at very low aluminum loadings. Such compounds are composed of a cation derived from d-block or f-block metal compound, such as a metallocene, by loss of a leaving group, and an aluminoxate anion derived by transfer of a proton from a stable or metastable hydroxyaluminoxane to such leaving group. These catalyst compositions have extememly high catalytic activity and typically have high solubility in paraffinic solvents. Moreover they yield reduced levels of ash and result in improved clarity in polymers formed from such catalysts.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: December 12, 2000
    Assignee: Albemarle Corporation
    Inventors: Feng-Jung Wu, Jamie R. Strickler
  • Patent number: 6150487
    Abstract: This invention relates to a multifunctional organic alkali metal initiator for the preparation of various kinds of star polymers by anionic polymerization, a process for making the initiator, a process using said initiator for making star polymers and the polymers obtained. The initiator can be represented by the formula: M.sub.a (RMe).sub.b, wherein M is selected from Sn, Ti, Al, Si and/or B; R is a hydrocarbyl group containing 8-100 carbon atoms, a=1-3, b=2.5-6.5, Me is an alkali metal which may be selected from Na and Li. The initiator was synthesized by reacting an organic alkali metal with a conjugated diene and/or a mono-olefin monomer, and then adding hetero-atom containing halide. The star polymer obtained has a radial molecular structure consisting of several macromolecular chain arms radiating from the initiator core, and its molecular weight distribution expressed by GPC presents a uniform singlet.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: November 21, 2000
    Assignee: China Petrochemical Corporation
    Inventors: Xingying Zhang, Guantai Jin, Suhe Zhao
  • Patent number: 6140521
    Abstract: Ansa bis(.mu.-substituted) Group 4 metal and aluminum compounds comprising a single Group 4 metal atom and two aluminum metal atoms corresponding to the formula: ##STR1## wherein: L' is a .pi.-bonded group,M is a Group 4 metal,J is nitrogen or phosphorus;Z is a divalent bridging group causing the complex to have an ansa structure,R' is an inert monovalent ligand;r is one or two;X independently each occurrence is a Lewis basic ligand group able to form a .mu.-bridging ligand group, and optionally the two X groups may be joined together, andA' independently each occurrence is an aluminum containing Lewis acid compound that forms an adduct with the metal complex by means of the .mu.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: October 31, 2000
    Assignee: The Dow Chemical Company
    Inventors: Eugene Y. Chen, William J. Kruper, Jr., Peter N. Nickias, David R. Wilson
  • Patent number: 6136744
    Abstract: A cation-generating cocatalyst is provided for activating a metallocene procatalyst. The cocatalyst comprises (1) a metal- and/or metalloid-containing first component, e.g., an aluminum compound, (2) a neutral metal- and/or metalloid-containing second component, e.g., a borane compound, and (3) an anionic metal- and/or metalloid-containing third component, e.g., a metal containing borate.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: October 24, 2000
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Daniel J. Gillis, Richard Karpeles
  • Patent number: 6130302
    Abstract: Salts of (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium are described. The (polyfluoroaryl)fluoroanions have the formula [ER'R"R'"F].sup..crclbar. wherein E is aluminum, gallium, or indium, wherein F is fluorine, and wherein R', R", and R'" is each a fluorinated phenyl, fluorinated biphenyl, or fluorinated polycyclic group.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: October 10, 2000
    Assignee: Northwestern University
    Inventors: Tobin J. Marks, You-Xian Chen
  • Patent number: 6117956
    Abstract: The instant invention teaches a method for forming a syndiotactic 1,2-polybutadiene product having a higher syndiotacticity and a higher melting temperature than syndiotactic 1,2-polybutadiene produced using chromium catalysts known in the prior art. The method includes polymerizing 1,3-butadiene in solution with a solvent, in the presence of catalytically effective amounts of: (a) a chromium compound; (b) an organomagnesium compound; and, (c) a cyclic hydrogen phosphite.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: September 12, 2000
    Assignee: Bridgestone Corporation
    Inventor: Steven Luo
  • Patent number: 6110858
    Abstract: Catalysts for olefin polymerization which consist essentially of a transition metal compound, a modified clay compound and an organic aluminum compound, wherein the modified clay compound comprises a reaction product of a clay mineral and a proton acid salt of a specific amine compound, as well as a method of polymerizing olefins using such catalysts. It is possible thereby to obtain olefin polymers with high productivity and low ash content.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: August 29, 2000
    Assignee: Tosoh Corporation
    Inventors: Toshiyuki Kaneko, Akihiro Yano
  • Patent number: 6096679
    Abstract: A process for producing a chromium-based catalyst for the production of polyethylene, the process comprising the steps of providing a catalyst support selected from silica, silica-titania and silica-zirconia; reacting the support with one of an aluminium alkyl compound or a chromium salt compound selected from at least one of chromium (III) acetylacetonate, chromium (III) acetate, chromium (III) oxalate and chromium (III) stearate; and thereafter reacting the support with the other of the aluminium alkyl compound or the chromium salt to produce a chromium-impregnated catalyst having a silica-alumina support, the catalyst composition comprising from 0.4 to 1.5 wt % chromium, based on the weight of the chromium-based catalyst and the alumina in the silica-containing support comprising from 0.5 to 4 wt % aluminium in the chromium-based catalyst.
    Type: Grant
    Filed: September 26, 1998
    Date of Patent: August 1, 2000
    Assignee: Fina Research, S.A.
    Inventors: Nicodeme Lonfils, Philippe Bodart, Guy Debras
  • Patent number: 6093674
    Abstract: The present invention relates to a supported cobalt catalyst consisting of(a) cobalt compounds,(b) organoaluminium compounds,(c) water or OH-acidic compounds,(d) inorganic or polymeric organic support materials and(e) modifiers selected from the group comprising tertiary phosphines,to the production thereof and to the use thereof for the polymerization of unsaturated compounds, in particular of conjugated dienes, in the gas phase. With the assistance of the catalysts according to the invention, it is possible to achieve gas phase polymerization of conjugated dienes with an elevated content of lateral double bonds in the polymers.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: July 25, 2000
    Assignee: Bayer AG
    Inventors: Heike Windisch, Gerd Sylvester
  • Patent number: 6072014
    Abstract: A process is provided for preparing polymer compositions which are multimodal in nature. The process involves contacting, under polymerization conditions, a selected addition polymerizable monomer with a metallocene catalyst having two or more distinct and chemically different active sites, and a catalyst activator.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: June 6, 2000
    Assignee: SRI International
    Inventor: Robert B. Wilson, Jr.
  • Patent number: 6040263
    Abstract: A novel non-aqueous catalytic composition comprises at least one quaternary ammonium and/or phosphonium salt in which the anion is selected from the group consisting of tetrafluoroborate, tetrachloroborate, hexafluorophosphate, hexafluoroantimonate, hexafluoroarsenate, trifluorosulphonate, fluorosulphonate, trifluoromethylsulphonate, trifluoroarsenate, dichlorocuprate, trichlorocuprate, tetrachlorocuprate, and trichlorozincate, and at least one complex of a transition metal from groups 8, 9 or 10, i.e., iron, ruthenium, colbalt, rhodium iridium, nickel, palladium and platinum. The catalyst can be used in a process of total or selective hydrogenation of unsaturated compounds such as monoolefins, diolefins, acetylene compounds, aromatic compounds, or polynuclear aromatic compounds. Hydrogenation may be accompanied by isomerisation.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: March 21, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Lothar Mussmann, Yves Chauvin, Helene Olivier
  • Patent number: 6037479
    Abstract: Novel, chiral diarsine compounds, which are present in the (R)- or (S)- or (rac)-form, of the formula ##STR1## wherein R signifies an optionally substituted aryl from the group of phenyI, naphthyl, furyl and thienyl; C.sub.3-8 -cycloalkyl or C.sub.1-8 -alkyl;R.sup.1, R.sup.2, R.sup.3 each independently signify C.sub.1-8 -alkyl, C.sub.1-8 -alkoxy, aryloxy, F or Cl,R.sup.2 and R.sup.3 each independently also signify hydrogen orR.sup.1 and R.sup.2 together signify tetramethylene or a benzo or benzofuro system or dioxymethylene on the respective benzene ring; orR.sup.2 and R.sup.3 together signify dioxymethylene,and the manufacture of the diarsine compounds of formula I, as well as complexes of the compounds of formula I with Group VIII metal and their use for enantioselective reactions.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: March 14, 2000
    Assignee: Hoffman-La Roche Inc.
    Inventors: Emil Albin Broger, Marco Cereghetti, Frank Kienzle
  • Patent number: 6031145
    Abstract: A catalyst composition for a process of oligomerising ethylene to produce 1-butene and/or 1-hexene wherein the catalytic composition is obtained by mixing at least one chromium compound with at least one aryloxy aluminum compound with general formula R.sub.n Al(R'O).sub.3-n where R is a linear or branched hydrocarbyl radical containing 1 to 30 carbon atoms, R'O is an aryloxy radical containing 6 to 80 carbon atoms and n is a whole number which can take the values 0, 1 or 2, and with at least one other hydrocarbyl aluminum compound selected from tris(hydrocarbyl)aluminum compounds or chlorinated or brominated hydrocarbyl aluminum compounds.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: February 29, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Dominique Commereuc, Sebastien Drochon, Lucien Saussine
  • Patent number: 6010974
    Abstract: An alkylene and/or silylene bridged binuclear metallocene catalyst for styrene polymerization is represented by the following formula (I): ##STR1## where M.sup.1 and M.sup.2 are the same or different transition metal of Group IVb of the Periodic Table; Cp.sup.1 and Cp.sup.2 are the same or different cyclopentadienyl; alkyl, alkoxy, silyl or halogen substituted cyclopentadienyl; indenyl; alkyl, alkoxy, silyl or halogen substituted indenyl; fluorenyl; or alkyl, alkoxy, silyl or halogen substituted fluorenyl, which is capable of .pi.-electron, .eta..sup.5 -bonding with M.sup.1 or M.sup.2 ; each of E.sup.1, E.sup.2 and E.sup.3, independently of one another, is a carbon atom or a silicon atom; m, p and q are integers of 0 to 15 and m+p+q.gtoreq.1; each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, independently of one another, is a hydrogen, an alkyl, an aryl, an alkoxy or a halogen; X is a hydrogen, an alkyl, an alkoxy or a halogen; and n is 3. M.sup.1 and M.sup.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: January 4, 2000
    Assignee: Cheil Industries, Inc.
    Inventors: Hyun-Joon Kim, Yi-yeol Lyu, Dong-ho Lee
  • Patent number: 6005061
    Abstract: In accordance with the present invention there is provided a new solid aluminoxy composition prepared by reacting aluminoxane with a boroxine. Still further there is provided olefin polymerization catalyst systems incorporating the inventive solid aluminoxy composition. Still further, there is provided processes of polymerization using the inventive solid aluminoxy composition.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: December 21, 1999
    Inventors: Rolf L. Geerts, Tara G. Hill, Scott E. Kufeld
  • Patent number: 5986024
    Abstract: A process is provided for preparing polymer compositions which are multimodal in nature. The process involves contacting, under polymerization conditions, a selected addition polymerizable monomer with a metallocene catalyst having two or more distinct and chemically different active sites, and a catalyst activator.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 16, 1999
    Assignee: SRI International
    Inventor: Robert B. Wilson, Jr.
  • Patent number: 5939347
    Abstract: A supported polyolefin catalyst activator, comprising a four coordinate anion having a direct chemical bond to a catalyst carrier, wherein said anion is comprised of a neutral, three coordinate compound, MR.sub.3, and a carrier having oxygen containing functionalities, wherein M is selected from the group comprising boron, tellurium, aluminum, gallium, indium and mixtures thereof, and R's can be the same or different and are selected from the group comprising alkyls, alkoxys, alkenyls, halogen substituted alkyls, alkoxys, and alkenyls, aryls, aryl halides, halides and mixtures thereof; and a cation counter ion to said anion, wherein said cation is a protonated base or a Lewis Acid capable of protonating or abstracting a moiety, such as an alkyl or aryl, from a transition metal containing catalyst precursor resulting in a cationic transition metal species.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: August 17, 1999
    Assignee: W.R. Grace & Co. -Conn.
    Inventors: David George Ward, Edmund Malott Carnahan
  • Patent number: 5936051
    Abstract: Metallocene complexes of a metal M selected from titanium, zirconium and hafnium, comprising at least one anionic group A containing an .eta..sup.5 -cyclopentadienyl ring co-ordinated with the metal M, wherein the anionic group is substituted in at least one position of the cyclopentadienyl ring with a radical having the formula:Ph*--(CR.sup.6 R.sup.7).sub.nwherein: R.sup.6 and R.sup.7 are independently hydrogen, halogen or a C.sub.1 -C.sub.4 alkyl group, preferably hydrogen, "n" is 0 or 1, preferably 1, Ph* is a C.sub.6 -C.sub.14 group comprising an aromatic ring linked to --CR.sup.6 R.sup.7 -- or to A and substituted with at least one and up to a maximum of three electron-attractor groups, on the condition that, when A is an .eta..sup.5 -indenyl group and "n" is 0, at least one Ph group is linked to A in position 1 or 3 of indenyl.These complexes can be used in (co)polymerization processes of .alpha.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: August 10, 1999
    Assignee: Enichem S.p.A.
    Inventors: Roberto Santi, Giampiero Borsotti, Cecilia Querci, Liliana Gila, Antonio Proto
  • Patent number: 5925723
    Abstract: A catalyst/cross-linking agent composition, containing at least onea) vinyltrialkoxysilane as cross-linking agent,b) dialkyltin oxide as catalyst,c) optional organic acid for the control of the reaction time,d) optional inert solvent, ande) optional dye or colored pigment,is especially useful for condensation/cross-linking of polysiloxanes, such as OH-endstopped polydimethylsiloxane, in making moldings. Especially useful for impression taking in the dental field.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: July 20, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Robert Friebe, Peter Schwabe, Reiner Voigt
  • Patent number: 5922819
    Abstract: Polymers of vinylaromatic compounds are prepared at from 0 to 150.degree. C. in the presence of catalyst systems which comprise as active constituentsA) compounds of the formula IXM(Z.sup.1).sub.z.sbsb.1 (Z.sup.2).sub.z.sbsb.2 (Z.sup.3).sub.z.sbsb.3 (I)where the substituents and indices have the following meanings:X is C.sub.1 -C.sub.10 -alkyl, 5- to 7-membered cycloalky,C.sub.1 -C.sub.10 -alkoxy, C.sub.6 -C.sub.15 -aryl or a cyctopentadienyl group,M is a metal of transition groups II to VIII of the periodic Table of the Elements,Z.sup.1 to Z.sup.3are polymers of vinylaromatic compounds, dienes, acrylates or mixtures thereofandZ.sup.1 to Z.sup.3are 0, 1, 2 or 3, where 1.ltoreq.Z.sub.1 +Z.sub.2 +Z.sub.3 .ltoreq.3,andB) linear or cyclic aluminoxane compoundorcompounds which form metallocenium ions and are selected from the group consisting of strong, uncharged Lewis acids, ionic compounds having a Lewis-acid cation and ionic compounds having a Bronsted acid as cation.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: July 13, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Josef Wunsch, Martin Lux, David Fischer
  • Patent number: 5914375
    Abstract: An catalyst composition for preparing high-syndiotacticity polystyrene polymers which comprises: (a) a titanium complex represented by the following formula of TiR'.sub.1 R'.sub.2 R'.sub.3 R'.sub.4 or TiR'.sub.1 R'.sub.2 R'.sub.3, wherein R'.sub.1, R'.sub.2, R'.sub.3, and R'.sub.4 are, independently, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a hydrogen atom, or a halogen atom; (b) a cyclopentadienyl complex of silicon (Si), germanium (Ge), or tin (Sn) represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: June 22, 1999
    Assignee: Industrial Technology Research Institute
    Inventors: Jing-Cheng Cheng Tsai, Shian-Jy Wang, Shu-Ling Peng, Mickey Sue
  • Patent number: 5908903
    Abstract: Catalyst systems which are suitable for polymerizing olefinically unsaturated compounds comprise as active constituentsA) a metallocene complex of the metals of the fourth, fifth or sixth transition group of the Periodic Table of the Elements,B) a compound forming metallocenium ions andC) a sterically hindered, organic Lewis base.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 1, 1999
    Assignee: BASF Aktiengesellschaft
    Inventor: Joachim Rosch
  • Patent number: 5905126
    Abstract: There is disclosed a process for producing a styrenic polymer which comprises polymerizing at least one styrenic monomer by the use of a polymerization catalyst comprising in combination (A) at least one transition metal compounds, (B) an aluminoxane, (C) a coordination complex compound comprising a cation and an anion in which a plurality of radicals are bonded to a metal and (D) an organoaluminum compound. The above process is capable of producing a styrenic polymer which has high degree of syndiotactic configuration and a wide range of molecular weight distribution and is minimized in residual metallic components at a low production cast with a high efficiency.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: May 18, 1999
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Norio Tomotsu, Mizutomo Takeuchi
  • Patent number: 5892081
    Abstract: The present invention relates to a process for preparing racemic ansa-metallocene complexes I ##STR1## tin compounds II ##STR2## and a process for preparing tin compounds II. R.sup.1 to R.sup.9, M, and X are defined herein.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: April 6, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Carsten Suling, Mario Huettenhofer, Hans-Herbert Brintzinger, Frank Schaper
  • Patent number: 5880302
    Abstract: The invention relates to an organometalic compound of the formula I ##STR1## where M is a metal atom, L are, independently of one another, identical or different .pi. ligands or other electron donors, T is a tin-containing bridge, Y are identical or different and are each a C.sub.1 -C.sub.20 -hydrocarbon group, an amide group, an alkoxy group or a halogen atom and K=0 or 1.The organometallic compound is suitable as catalyst component for olefin polymerization.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: March 9, 1999
    Assignee: Targor GmbH
    Inventors: Hans-Friedrich Herrmann, Frank Kuber, Wolfgang Anton Herrmann, Markus Morawietz
  • Patent number: 5856257
    Abstract: A process is provided to modify an olefin production catalyst system which comprises contacting an olefin production catalyst system with ethylene prior to use. A process also is provided to trimerize and/or oligomerize olefins with the novel, modified olefin catalyst production system. The modified olefin production catalyst system produces less solids, such as, for example, polymer.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: January 5, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Jeffrey W. Freeman, John L. Buster, Ronald D. Knudsen
  • Patent number: 5854166
    Abstract: A trityl perfluorophenyl alumninate such as tris(2,2',2"-nonafluorobiphenyl) fluoroaluminate (PBA.sup.-) and its role as a cocatalyst in metallocene-mediated olefin polymerization is disclosed.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: December 29, 1998
    Assignee: Northwestern University
    Inventors: Tobin J. Marks, You-Xian Chen
  • Patent number: 5834393
    Abstract: A supported catalyst component comprising (a) a support material, an organometal compound, and (b) an activator compound comprising b.1) a cation which is capable of reacting with a transition metal metallocene compound to form a catalytically active transition metal complex, and b.2) a compatible anion having up to 100 nonhydrogen atoms and containing at least one substituent comprising an active hydrogen moiety; a supported catalyst comprising the supported catalyst component and a transition metal compound; process for making the same; an addition polymerization process using the supported catalyst; complex compounds, and a method for preparing the same.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: November 10, 1998
    Assignee: The Dow Chemical Company
    Inventors: Grant Berent Jacobsen, Peter Wijkens, Johann T. B. H. Jastrzebski, Gerard Van Koten
  • Patent number: 5830959
    Abstract: Process for the preparation of crystalline vinylaromatic polymers with a high degree of syndiotacticity which comprises polymerizing vinylaromatic monomers in the presence of a catalytic system essentially consisting of:a) a complex of titanium selected from those having the general formula:(CpR.sub.1 R.sub.2 R.sub.3 R.sub.4 R.sub.5)TiX.sub.3 (I)wherein the groups R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent a hydrogen atom or C.sub.1 -C.sub.10 alkyl groups;X represents a hydrogen atom, a halogen such as chlorine, a C.sub.1 -C.sub.10 alkyl or oxyalkyl radical or a C.sub.6 -C.sub.12 oxyaryl radical;b) an alkylaluminoxane; andc) an organic derivative of tin;characterized in that the alkylaluminoxane is methylaluminoxane (MAO) treated at 20.degree.-80.degree. C. under vacuum for 1-100 hours and the organic derivative of tin is tin tetraphenyl.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: November 3, 1998
    Assignee: Enichem S.p.A.
    Inventors: Riccardo Po', Nicoletta Cardi, Roberto Santi
  • Patent number: 5821189
    Abstract: A catalyst for the (co)polymerization of ethylene is obtained by a process comprising the contact of the following components (A), (B), (C) and (D) in the respective molar ratios (1):(0.5-2):(0-25):(0-15):(A): a bivalent arene of titanium having the formulaTi (.eta..sup.6 -arene)(AlR.sub.x X.sub.4-x).sub.2 ;wherein: "arene" indicates benzene, or benzene substituted with from 1 to 6 C.sub.1 -C.sub.10 alkyl groups;each X independently represents a chlorine, bromine or fluorine atom;R is a C.sub.1 C.sub.10 alkyl group, linear or branched; "x" is a number varying from 0.5 to 2.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: October 13, 1998
    Assignee: Enichem S.p.A.
    Inventors: Fausto Calderazzo, Guido Pampaloni, Francesco Masi, Andrea Vallieri
  • Patent number: 5821310
    Abstract: There is provided an organometallic compound comprising a metal M of Group 3 to 6 of the Periodic Table or the Lanthanide series and at least one (hetero)cyclohexadienyl ligand of the general formula (I)C.sub.5 AR.sub.nwherein A is an element chosen from Group 13 to 16 of the Periodic Table, R which can be connected to C or to A and which may form a bridge is independently hydrogen or an organic substituent which may contain one or more hetero-atoms and n is 3 plus the number of valencies of A. There is further provided the use of this compound as a catalyst, with a co-catalyst, in a process for the (co)oligomerisation or (co)polymerisation of olefinically unsaturated hydrocarbons.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: October 13, 1998
    Assignee: Shell Oil Company
    Inventors: Eric Johannes Maria De Boer, Bart Johan Ruisch, Lodewijk Schoon
  • Patent number: 5807803
    Abstract: A catalyst composition having high epoxidation activity and resistant to leaching of its metal comprises molybdenum, vanadium, tungsten and/or titanium complexed to an organic or inorganic support through the intermediacy of an imidazole ligand. The catalyst may be used in epoxidation of olefinic compounds.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: September 15, 1998
    Assignee: BP Chemical Limited
    Inventors: Malcolm John Cunnington, Matthew More Miller, David Colin Sherrington, Sydney Simpson, Gunnar Olason
  • Patent number: 5807940
    Abstract: The present invention provides a catalyst for polymerization comprising (A) a transition metal compound containing at least one linkage represented by the general formula (I):M.sup.1 --Z--C (I)wherein M.sup.1 represents a metal element of Groups 3 to 6 or the lanthanide series, and Z represents an element of Group 15, in one molecule, (B) (a) a compound which can form an ionic complex by the reaction with the transition metal compound or (b) a specific oxygen-containing compound, and (C) a metal compound containing alkyl group which is optionally used; and a process for producing a styrenic polymer, particularly a styrenic polymer having a highly syndiotactic configuration, comprising using this catalyst for polymerization.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: September 15, 1998
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Yoshiaki Aoyama, Norio Tomotsu
  • Patent number: 5789333
    Abstract: The present invention provides new catalyst formats which comprise a supported catalyst tethered to a second and different catalyst by a suitable tethering ligand. A preferred system comprises a heterogeneous supported metal catalyst tethered to a homogeneous catalyst. This combination of homogeneous and heterogeneous catalysts has a sufficient lifetime and unusually high catalytic activity in arene hydrogenations, and potentially many other reactions as well, including, but not limited to hydroformylation, hydrosilation, olefin oxidation, isomerization, hydrocyanation, olefin metathesis, olefin polymerization, carbonylation, enantioselective catalysis and photoduplication. These catalysts are easily separated from the products, and can be reused repeatedly, making these systems very economical.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: August 4, 1998
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Robert J. Angelici, Hanrong Gao
  • Patent number: 5786291
    Abstract: This invention relates to supported metallocene catalyst systems and to methods for their production and use. Specifically, this invention relates to supported catalyst systems having unique, predetermined properties resulting from the designed distribution of catalyst components within and upon porous support particles. The designed distribution of catalyst components is obtained through sequential deposition of catalyst components with intervening removal of solvent.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: July 28, 1998
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Anthony N. Speca, Jeffrey L. Brinen, James J. McAlpin
  • Patent number: 5783715
    Abstract: The invention relates to ferrocenyldiphosphine ligands containing a silylene group, ferrocenyldiphosphines bound to inorganic or polymeric organic supports by this silylene group, their preparation and also their metal complexes with transition metals such as rhodium or iridium. The invention also relates to the use of these complexes for hydrogenating organic double or triple bonds, in particular olefinic double bonds and carbon-heteroatom double bonds. The complexes are particularly suitable for enantioselective hydrogenation using chiral diphosphines and prochiral unsaturated compounds.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: July 21, 1998
    Assignee: Novartis Corporation
    Inventor: Benoit Pugin
  • Patent number: 5759943
    Abstract: This invention relates to activated charcoal granule compositions which can be dry spread and "watered-in" to a site to reduce undesirable biological activity of deleterious organic compounds. When wet, these granules disperse very rapidly with a large dispersion area to original granule diameter ratio. The granules have high loadings of charcoal, i.e., from about 60 to about 95 weight percent and contain from about 5 to about 40 weight percent of a surfactant system which exhibits excellent dispersing; rewetting; and binding properties.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: June 2, 1998
    Assignee: Rhone-Poulenc Inc.
    Inventors: Mark David Einziger, Edward G. Fu, Alan Joseph Stern, Stanley John Kostka, Patrick Michael Holroyd
  • Patent number: 5756609
    Abstract: An olefin homogeneous polymerization catalyst demonstrating increased activity is formed from a cyclopentadienyl metallocene component, a salt of a compatible cation and a non-coordinating anion, and a C.sub.3 -C.sub.6 trialkylaluminum, preferably triisobutylaluminum. A homogeneous polymerization process comprises controlling polymerization activity with such catalyst by controlling the aluminum/metal (Al/M) molar ratio to a minimal level within the effective range of Al/M ratios.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: May 26, 1998
    Assignee: Amoco Corporation
    Inventor: Steven A. Cohen
  • Patent number: 5753584
    Abstract: A catalyst system for selective hydrogenation of sulfur-containing and nitrogen-containing compounds of a heteroaromatic organic phase includes a mixture of a noble metal selected from Group VIII of the Periodic Table of Elements and a water-soluble ligand. A process for preparing the catalyst system and hydrogenation process using the catalyst system are also provided.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: May 19, 1998
    Assignee: Intevep, S.A.
    Inventors: Daniel E. Paez, Antida Andriollo, Roberto A. Sanchez-Delgado, Norma del V. Valencia, Roberto E. Galiasso, Francisco A. Lopez
  • Patent number: 5753579
    Abstract: The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high trans-1,4-polybutadiene, styrene-isoprene-butadiene terpolymers with high trans-1,4-polybutadiene microstructures, high trans-isoprene-butadiene copolymers, and styrene-butadiene copolymers having high trans-1,4-polybutadiene microstructures. Such polymers can be utilized in tire tread rubber compounds which exhibit improved wear characteristics, tear resistance and low temperature performance characteristics. This invention more specifically reveals a process for synthesizing a high trans polymer which comprises adding (a) at least one organolithium initiator or organomagnesium initiator, (b) an organoaluminum compound, (c) a barium alkoxide, and (d) an organozinc compound to a polymerization medium which is comprised of an organic solvent and at least one conjugated diene monomer.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: May 19, 1998
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: George Jalics, Adel Farhan Halasa
  • Patent number: 5733842
    Abstract: An improved catalyst carrier is formed by a process that comprises the use of ceramic particle components with particle sizes chosen to ensure that a desired degree of porosity is obtained without recourse to the use of organic burnout materials.
    Type: Grant
    Filed: February 10, 1997
    Date of Patent: March 31, 1998
    Assignee: Norton Checmical Process Products Corporation
    Inventors: William H. Gerdes, Donald J. Remus, Thomas Szymanski
  • Patent number: 5728784
    Abstract: Process for the preparation of crystalline vinylaromatic polymers with a predominantly syndiotactic structure which comprises polymerizing vinylaromatic monomers, alone or mixed with at least one other monomer, in the presence of a catalytic system essentially consisting of:a) a complex of titanium or zirconium selected from those having general formula:MR.sub.1 R.sub.2 R.sub.3 R.sub.4, A.sub.1 MR.sub.1 R.sub.2 R.sub.3, A.sub.1 A.sub.2 MR.sub.1 R.sub.2 (I)b) a co-catalyst selected from an alkylalumoxane and a compound of boron having formula (II):BX.sub.1 X.sub.2 X.sub.3 (II)or one of its salts;c) a derivative of tin having general formula:SnR.sub.5 R.sub.6 R.sub.7 R.sub.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: March 17, 1998
    Assignee: Enichem S.p.A.
    Inventors: Riccardo Po', Nicoletta Cardi, Roberto Santi
  • Patent number: 5726115
    Abstract: A catalyst composition comprising a bis-amide compound represented by the formula ##STR1## wherein M is zirconium, hafnium or titanium; each N is a three coordinate nitrogen atom; each e is Si, Ge or Sn; each Z is, independently, a hydride or R; each R is, independently, a hydrocarbyl one or more carbon atoms of which may be substituted by an element selected from Si, O, P, N and S; L is a neutral Lewis base and m is a number from 0 to 2; or a dimer thereof and a second component. Preferably the second component is a compound which is capable of providing a bulky and labile anion ?A!.sup.-, which anion is substantially non-coordinating under the reaction conditions and contains at least one boron atom. Also provided is a process for oligomerizing or co-oligomerizing alpha olefins in the presence of this catalyst composition.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: March 10, 1998
    Assignee: Shell Oil Company
    Inventors: Andrew David Horton, Jan De With
  • Patent number: 5721327
    Abstract: Process for the preparation of crystalline vinylaromatic polymers with a predominant syndiotactic structure which involves polymerizing vinylaromatic monomers in the presence of a catalytic system comprising: a titanium complex having general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, the same or different, represent a hydrogen atom or a C.sub.1 -C.sub.20 alkyl radical or a C.sub.6 -C.sub.20 arylalkyl or aryl radical, on the condition that at least one of these is different from hydrogen.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: February 24, 1998
    Assignee: Enichem S.p.A.
    Inventors: Roberto Santi, Giuseppe Cometti, Riccardo Po', Nicoletta Cardi
  • Patent number: 5714426
    Abstract: In accordance with the present invention, there are provided ethylene copolymers composed of structural units (a) derived from ethylene and structural units (b) derived from .alpha.-olefin of 3.about.20 carbon atoms, said ethylene copolymers having?A! a density of 0.85.about.0.92 g/cm.sup.3,?B! an intrinsic viscosity ?.eta.! as measured in decalin at 135.degree. C. of 0.1.about.10 dl/g,?C! a ratio (Mw/Mn) of a weight average molecular weight (Mw) to a number average molecular weight (Mn) as measured by GPC of 1.2.about.4, and?D! a ratio (MFR.sub.10 /MFR.sub.2) of MFR.sub.10 under a load of 10 kg to MFR.sub.2 under a load of 2.16 kg at 190.degree. C. of 8.about.50, and being narrow in molecular weight distribution and excellent in flowability.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: February 3, 1998
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Toshiyuki Tsutsui, Ken Yoshitsugu, Akinori Toyota
  • Patent number: 5712354
    Abstract: The invention relates to new transition metal compounds useful as olefin polymerization catalysts. They are characterized by the formula (V)(E)(W)M(L), which in which M is a transition metal, V, E, and W, is e.g.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: January 27, 1998
    Assignee: Mobil Oil Corporation
    Inventors: James M. Boncella, David E. Richardson, Faisal A. Shafiq
  • Patent number: 5700748
    Abstract: A catalyst precursor of the formula: ##STR1## wherein: L is a cycloalkadienyl ligand;W, X, Y, and Z are independently hydrogen, a hydrocarbyl group containing 1 to 20 carbon atoms, or a silyl group, and may be connected to L through a bridging group comprising at least two Group IVA atoms; with the proviso that one of X, Y, and Z is a negative charge stabilizing group selected from the group consisting of Group IVA trialkyl groups, aryl groups, heteroaromatic groups, ethylenically unsaturated hydrocarbon groups, acetylenically unsaturated hydrocarbon groups, ketonic groups, and aromatic organometallic moieties, is provided. When combined with a compound comprising a metal from Groups IIIB to VIII or the Lanthanide series of the Periodic Table of elements and an activating cocatalyst, the catalyst precursor is useful for the polymerization of olefins.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: December 23, 1997
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Rex Eugene Murray
  • Patent number: 5698745
    Abstract: A hydroformylation process for the production of linear aldehydes of an olefin, with hydrogen and carbon monoxide in a solvent containing a catalyst having a platinum component, a bidentate diaryl phosphine component where the bridging group is ferrocenyl, and an acid promoter component.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: December 16, 1997
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Patrick Michael Burke, Onko Jan Gelling, Henk Oevering, Imre Toth
  • Patent number: 5696045
    Abstract: Polyolefins with a molecular weight distribution M.sub.w /M.sub.n .gtoreq.3.0, which may be monomodal, bimodal or multimodal, can be obtained by polymerization or copolymerization of olefins with a catalyst system consisting of an aluminoxane and a transition metal component (metallocene), in which the transition metal component consists of at least one zirconocene of the formula I and at least one zirconocene of the formula Ia ##STR1## or alternatively of at least 2 zirconocenes of the formula I.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: December 9, 1997
    Inventors: Andreas Winter, Walter Spaleck, Bernd Bachmann