Including Comminuting (e.g., Milling, Grinding, Etc.) Patents (Class 502/105)
  • Patent number: 10513571
    Abstract: Methods of preparing a polymerization catalyst component is provided, in which a magnesium component, a Lewis acid solubilizing component, a titanium compound, optionally a transition metal compound different than the titanium compound, and typically an inert filler are combined in a slurrying agent and spray-dried to produce a catalyst precursor in the form of a substantially spherical and porous solid particle. The methods and catalysts of this disclosure can provide ethylene homopolymer and copolymer resins having a high molecular weight tail and a broadened molecular weight distribution as compared to more traditional Ziegler-Natta catalysts.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: December 24, 2019
    Assignee: Union Carbide Chemicals & Plastics Technology LLC
    Inventors: Burkhard E. Wagner, Robert C. Job, Ann M. Schoeb-Wolters, Robert J. Jorgensen
  • Patent number: 9796796
    Abstract: A catalyst composition for the polymerization of propylene is provided. The catalyst composition includes one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and an internal electron donor, one or more aluminum containing cocatalysts, and a selectivity control agent (SCA). The SCA is a mixture of an activity limiting agent (ALA) and selectivity determining agent (SDA) such as a non-silane composition. The present catalyst composition is silane-free, has high catalyst activity and high stereoselectivity, and is self-extinguishing.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: October 24, 2017
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Linfeng Chen, Richard E. Campbell, Jr.
  • Patent number: 9499569
    Abstract: A magnesium halide adduct represented by the formula (I): MgX2.mROH.nE.pH2O, in which X is chlorine, bromine, a C1-C12 alkoxy, a C3-C10 cycloalkoxy or a C6-C10 aryloxy, with the proviso that at least one X is chlorine or bromine; R is a C1-C12 alkyl, a C3-C10 cycloalkyl or a C6-C10 aryl; E is an o-alkoxybenzoate compound represented by the formula (II): in which R1 and R2 groups are independently a C1-C12 linear or branched alkyl, a C3-C10 cycloalkyl, a C6-C10 aryl, a C7-C10 alkaryl or an C7-C10 aralkyl, the R1 and R2 groups are identical to or different from the R group; m is in a range of from 1.0 to 5.0; n is in a range of from 0.001 to 0.5; and p is in a range of from 0 to 0.8, is disclosed. A catalyst component useful in olefin polymerization, which comprises a reaction product of (1) the magnesium halide adduct, (2) a titanium compound, and optionally (3) an electron donor compound, is also disclosed.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: November 22, 2016
    Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION
    Inventors: Xianzhi Xia, Yuexiang Liu, Jigui Zhang, Xinsheng Wang, Ping Gao, Suzhen Qiao, Maoping Yin, Weili Li, Tianyi Zhang, Renqi Peng, Ying Chen, Zhihui Zhang
  • Patent number: 9493590
    Abstract: A novel polyethylene formed by Ziegler catalyst is devised, for use in blow moulding.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: November 15, 2016
    Assignee: Basell Polyolefine GmbH
    Inventors: Joachim Berthold, Bernd Lothar Marczinke, Diana Dötsch, Rainer Sattel, Iakovos Vittorias, Peter Bisson
  • Patent number: 9481748
    Abstract: The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: November 1, 2016
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Qinyan Wang, Helena Ouskine, Mohamed Aiffa, Amy Baltimore, Holly Severin, Perry Dewit, Steven Clemens, Lawrence Martin Josef Van Asseldonk, Isam Jaber
  • Patent number: 9382347
    Abstract: Ziegler-Natta catalysts, processes of forming the same and using the same are described herein. The process generally includes contacting a metal component with a magnesium dihalide support material to form a Ziegler-Natta catalyst precursor; contacting the support material with a dopant including a non-Group IV metal halide to form a doped catalyst precursor; and activating the doped catalyst precursor by contact with an organoaluminum compound to form a Ziegler-Natta catalyst.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: July 5, 2016
    Assignee: FINA TECHNOLOGY INC
    Inventors: Lei Zhang, David Knoeppel
  • Patent number: 9260548
    Abstract: The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerisation catalyst component in particulate form having an improved high temperature activity and the use thereof in a process for polymerising olefins.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: February 16, 2016
    Assignee: Borealis Technology Oy
    Inventors: Timo Leinonen, Peter Denifl, Holger Pöhler
  • Patent number: 8846996
    Abstract: The present invention provides a process for the manufacture of an efficient and robust catalyst for the oxidative dehydrogenation of paraffins to olefins, preferably lower C2-4 paraffins. The present invention provides a process for the preparation of an oxidative dehydrogenation catalyst of C2-4 paraffins to olefins comprising comminuting: from 10 to 99 weight % of a mixed oxide catalyst of the formula VxMoyNbzTemMenOp, wherein Me is a metal selected from the group consisting of Ta, Ti, W, Hf, Zr, Sb and mixtures thereof; with from 90 to 1 weight % of an inert matrix selected from oxides of titanium, zirconia, aluminum, magnesium, yttria, lantana, silica and their mixed compositions or a carbon matrix to produce particles having a size from 1 to 100 microns and forming the resulting particles into pellets having a size from 0.1 to 2 mm.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: September 30, 2014
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Leonid Modestovich Kustov, Aleksey Victorovich Kucherov, Elena Dmitrievna Finashina, Tatyana Nikolaevna Kucherova, Vera Ilynichna Isaeva, Andrzej Krzywicki, Haiyong Cai
  • Patent number: 8101537
    Abstract: A method of producing a prepolymerized catalyst for olefin polymerization comprising a fine powder removal step of removing fine particles from olefin-prepolymerized catalyst particles for olefin polymerization. The prepolymerized catalyst having a low fine particle content is applicable suitably to the field of continuous polymerization of olefins.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: January 24, 2012
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tomoaki Goto, Yoshimitsu Onodera
  • Patent number: 7955529
    Abstract: This invention discloses the synthesis of a bifunctional La0.6Ca0.4Co1-xIrxO3 (x=0˜1) perovskite compound with a superb bifunctional catalytic ability for the oxygen reduction and generation in alkaline electrolytes. Synthetic routes demonstrated include solid state reaction, amorphous citrate precursor, and mechanical alloying. The interested compound demonstrates notable enhancements over commercially available La0.6Ca0.4CoO3.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: June 7, 2011
    Assignee: National Chiao Tung University
    Inventors: Pu-Wei Wu, Yun-Min Chang
  • Patent number: 7939463
    Abstract: A process for producing a high surface area iron material, comprising predominantly low crystalline iron oxides, starting with a low surface area iron metal is disclosed. The iron material of the present invention has a surface area of at least about 200 m2/g, and is prepared via a method which comprises reacting a low surface area iron metal with oxygen and an organic acid. The high surface area iron material formed via this method is essentially free of contaminants.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: May 10, 2011
    Assignee: Sud-Chemie Inc.
    Inventors: Robert J. O'Brien, Samantha E. Sargent, Guido Petrini, Esterino Conca
  • Patent number: 7566680
    Abstract: A method for producing a high surface area iron material starting with a low surface area iron metal is disclosed. The iron material of the present invention has a surface area of at least about 200 m2/g, and is prepared via a method which comprises reacting a low surface area iron metal with oxygen and an organic acid. The high surface area iron material formed via this method is essentially free of contaminants.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: July 28, 2009
    Assignee: Sud-Chemie Inc.
    Inventors: Guido Petrini, Esterino Conca, Robert J. O'Brien, X.D. Hu, Samantha Sargent
  • Patent number: 7271119
    Abstract: Process for preparing an olefin polymerisation catalyst component in the form of particles having a predetermined size range, said process comprising the steps of a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said metal with said electron donor or a precursor thereof in an organic liquid reaction medium; b) adding said solution of said complex to at least one compound of a transition material to produce an emulsion, the dispersed phase of which contains more than 50 mol % of the Group 2 metal in said complex; c) agitating the emulsion, optionally in the presence of an emulsion stabilizer, in order to maintain the droplets of said dispersed phase within the average size range 5 to 200 m; d) solidifying said droplets of the dispersed phase; and e) recovering the solidified particles of the olefin polymerisation catalyst component, wherein a turbulence minimizing agent (TMA) is added to the reaction mixture before solidifying said droplets of the disperse
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: September 18, 2007
    Assignee: Borealis Technology Oy
    Inventors: Peter Denifl, Timo Leinonen
  • Patent number: 7199077
    Abstract: A Fischer-Tropsch catalyst comprising iron and at least one promoter is prepared via a method which comprises the preparation of a high purity iron precursor and which uses a nominal amount of water in the catalyst production. The catalyst particles prepared with the high purity iron precursor have an essentially spherical particle shape, a relatively narrow particle size distribution range, and a high surface area.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: April 3, 2007
    Assignee: Sud-Chemie Inc.
    Inventors: X. D Hu, Robert J. O'Brien, Richard Tuell, Esternio Conca, Carlo Rubini, Guido Petrini
  • Patent number: 7057010
    Abstract: Process for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, in which the gelled and washed polymers obtained by polymerization, crosslinkage and optionally alkylation are dried continuously using a gaseous medium under normal pressure or overpressure in a fluidized bed.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: June 6, 2006
    Assignee: DSM Fine Chemcials NFG GmbH & Co KG
    Inventors: Michael Stanek, Georg Häubl, Walter Raml, Erich Steinwender
  • Patent number: 7008898
    Abstract: The invention relates to a method for producing a poly-1-olefin by polymerisation of a 1-olefin of the formula R4CH?CH2, in which R4 is hydrogen or an alkyl radical having from 1 to 10 carbon atoms, in suspension, in solution or in the gas phase, at a temperature of from 20 to 200° C. and a pressure of from 0.5 to 50 bar, in the presence of a catalyst which consists of the product of the reaction of a magnesium alkoxide with a transition-metal compound (component a) and an organometallic compound (component b), whose component a has been produced by reacting a transition-metal compound of titanium, zirconium, vanadium or chromium with a gelatinous dispersion of the magnesium alkoxide in an inert hydrocarbon.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: March 7, 2006
    Assignee: Basell Polyolefine GmbH
    Inventors: Frank Alt, Paul Schöneborn, Ludwig Böhm
  • Patent number: 6887817
    Abstract: An olefin polymerization catalyst is described which includes: (A) a solid catalyst component being prepared by copulverizing a magnesium compound, an aluminum compound, an electron donor and a titanium compound, and (B) an organoaluminum compound. The present invention is also directed to a process for preparing polyolefins using the aforesaid catalyst system to polymerize olefins.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: May 3, 2005
    Assignee: Formosa Plastics Corporation, U.S.A.
    Inventors: Bing Lu, Honglan Lu, Chih-Jian Chen
  • Patent number: 6755364
    Abstract: Methods and apparatus for combinatorial (i.e., high-throughput) materials research, such as catalysis research, that involves parallel apparatus for simultaneously effecting mechanical treatments such as grinding, mixing, pressing, crushing, sieving, and/or fractionating of such materials are disclosed. The methods and apparatus are useful for mechanically treating catalysis materials and other solid materials, including without limitation, electronic materials such as phosphors, colorants such as pigments, and pharmaceuticals such as crystalline drugs or drug candidates. The simultaneous protocols and parallel apparatus offer substantial improvements in overall throughput for preparing arrays of materials, such as catalysis materials.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: June 29, 2004
    Assignee: Symyx Technologies, Inc.
    Inventors: Claus Lugmair, Alfred Hagemeyer, Lynn Van Erden, Anthony F. Volpe, Jr., David M. Lowe, Yumin Liu
  • Patent number: 6649731
    Abstract: By the present invention, there are provided a catalyst for polyester preparation, which comprises a solid titanium compound containing titanium, oxygen, carbon and hydrogen and having a Ti—O bond and which has a maximum solubility in ethylene glycol, as measured when the catalyst is dissolved in ethylene glycol under heating at 150° C., of not less than 3,000 ppm in terms of a titanium atom, a catalyst for polyester preparation, which comprises a titanium-containing solution wherein a contact product of a hydrolyzate of a titanium halide or a hydrolyzate of a titanium alkoxide with a polyhydric alcohol is dissolved in ethylene glycol in an amount of 3,000 to 100,000 ppm in terms of a titanium atom, a process for preparing a polyester using the catalyst, and a polyester prepared by the process.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: November 18, 2003
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hideshi Hori, Fujito Ehara, Akiyoshi Shimizu, Nobumasa Mukai, Shoji Hiraoka
  • Patent number: 6639043
    Abstract: The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are azonaphthalene sulfonates in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The transesterification catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide in combination with tetramethylammonium hydroxide co-catalyst.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: October 28, 2003
    Assignee: General Electric Company
    Inventors: John Patrick Lemmon, Ronald James Wroczynski
  • Patent number: 6600011
    Abstract: This invention relates to a method for purifying and drying a polymer hydrogel. This invention is based in part upon the discovery that rapid drying of polymer hydrogels can eliminate the problem of unacceptable levels of soluble oligomers caused by prolonged thermal treatment. Rapid drying techniques allow drying hydrogels containing more water than was previously considered possible without a loss in product quality. Furthermore, it was discovered that slurries comprising polymer hydrogels and large quantities of water can be spray dried and that spray drying can be conducted with only minimal oligomer formation.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: July 29, 2003
    Assignee: Genzyme Corporation
    Inventors: Peter D. McDonnell, Gary S. Rea, Peter W. Thomas, Mark F. Larrousse, Richard V. Bodmer, Jr.
  • Publication number: 20030047488
    Abstract: A catalyst for reacting hydrocarbon with steam according to the present invention, has a specific surface area of 40 to 300 m2/g, and comprises:
    Type: Application
    Filed: August 19, 2002
    Publication date: March 13, 2003
    Inventors: Katsuomi Takehira, Tetsuya Shishido, Hiroyuki Morioka, Naoya Kobayashi, Tsutomu Katamoto, Tomoyuki Imai, Kozo Iida, Toshinobu Yasutake
  • Patent number: 6468936
    Abstract: The catalyst is a mixture of metallocene catalyst component of the general formula: R″b(CpR4)(CpR′4)MR*v−2 where R″ is a bridge imparting stereorigidity to the structure to the metallocene by connecting the two cyclopentadienyl rings, b is 0 or 1, Cp is a cyclopentadienyl ring, R and R′ are substituents on the cyclopentadienyl rings and can be a hydride or a hydrocarbyl from 1-9 carbon atoms, each R and R′ being the same or different, each (CpR4) and (CpR′4) being the same or different, M is a Group IIIB, IVB, VB or VIB metal, R* is a hydride, a halogen or a hydrocarbyl from 1-20 carbon atoms, v is the valence of M and an aluminoxane co-catalyst in a solvent. The solvent is removed from the mixture of metallocene and aluminoxane to form a solid. The solid mixture is ground and delivered into a reactor in a mineral oil slurry.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: October 22, 2002
    Assignee: Fina Technology, Inc.
    Inventors: Baireddy Raghava Reddy, Edwar Shoukri Shamshoum
  • Patent number: 6420304
    Abstract: The invention relates to a polymer-supported carbonylation catalyst and its use in a process for preparing organic carboxylic acid or anhydride having n+1 carbon atoms. The invention relates also to a process for preparing organic carboxylic acid or anhydride having n+1 carbon atoms by carbonylating with monoxide, in the presence of the above-mentioned carbonylation catalyst, on alcohols having n carbon atoms, ethers having 2n carbon atoms or esters formed from said alcohols and acids. In particular, the invention relates to a process for preparing acetic acid by carbonylating methanol with carbon monooxide in the presence of said carbonylation catalyst. By using said carbonylation catalyst, the temperature for carbonylation can be lowered to about 160° C. with a reaction rate better than that of a traditional process, while the tendency of catalyst precipitation in the course of carbonylation can be improved also.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: July 16, 2002
    Assignee: China Petrochemical Development Corporation
    Inventors: Chia-Jung Tsai, Yao-Lung Liu, Hsi-Chin Tsai
  • Patent number: 6417320
    Abstract: The production of linear polyester by the interchange of ester radicals or esterification and polycondensation of multivalent alcohols with multivalent carboxylic acids takes place by means of catalysts. In order that the catalyst features the lowest possible content of catalytically active metal compound, the carrier substance that forms the heterogeneous phase comprises particles of the finest grain and of porous structure and features a surface of great inner, reactive and/or coordinated centers, whereby a catalytically active metal compound is adsorbed in the pores.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: July 9, 2002
    Assignee: Zimmer Aktiengesellschaft
    Inventors: Brigitta Otto, Karl Ulrich Thiele, Xiaogang Guo
  • Patent number: 6403519
    Abstract: Process for the preparation of a catalyst for the polymerization of alpha-olefins involves contacting a porous polyolefin support with a solution containing an activator (ii) to form a suspension. The suspension is evaporated in a reactor fitted with a stirrer comprising a scraping element. The scraping element follows the walls of the reactor at a distance from 2 to 200 times the mean particle diameter of the support. The catalyst includes a compound of a transition metal (i) from Groups 4 to 6 of the Periodic Table and at least one optionally substituted cyclopentadiene ligand and an aluminoxane activator (ii). The aluminoxane activator (ii) and transition metal compound are supported on the porous polyethylene support (iii). The walls of the reactor show no traces of crusting.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: June 11, 2002
    Assignee: Solvay Polyolefins Europe-Belgium (Societe Anonyme)
    Inventors: Philippe Francois, Serge Bettonville, Dominique Marchand
  • Publication number: 20020061814
    Abstract: In a metalliferous storage material for hydrogen a metal oxide is provided in or on the surface of the metalliferous material as a catalyst for the hydrogenation or dehydrogenation of the metalliferous storage material.
    Type: Application
    Filed: September 25, 2001
    Publication date: May 23, 2002
    Inventors: Thomas Klassen, Rudiger Bormann, Wolfgang Oelerich, Volker Guther, Andreas Otto
  • Patent number: 6384159
    Abstract: The present invention relates to a process to produce polyethylene through homopolymerization or copolymerization of ethylene with alpha-olefins in the presence of a titanium amide catalyst supported by an organic polymer material, for the production of moldings, such as through extrusion, injection molding, film blowing, sintering under pressure or ram extrusion. The catalyst according to the present invention contains a partially chloromethylated styrene divinyl benzene copolymer as the organic polymer material, a complex compound supported by it, which contains Mg, Al and Ti.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: May 7, 2002
    Assignee: Buna Sow Leuna Olefinverbund GmbH
    Inventors: Jürgen Schellenberg, Heinz-Jürgen Kerrinnes, Gerd Fritzsche, Gerd Lohse
  • Patent number: 6358381
    Abstract: The invention relates to a novel rhodium sulfide catalyst for the reduction of oxygen in industrial electrolyzers. The catalyst is highly resistant towards corrosion and poisoning by organic species, thus resulting particularly suitable for use in aqueous hydrochloric acid electrolysis, when technical grade acid containing organic contaminants is employed.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: March 19, 2002
    Assignee: De Nora S.p.A.
    Inventors: Robert J. Allen, James R. Giallombardo, Daniel Czerwiec, Emory S. De Castro, Khaleda Shaikh
  • Patent number: 6300273
    Abstract: The present invention relates to catalysts for the polymerization of ethylene and its mixtures with olefins CH2═CHRVIII, comprising the reaction product of a solid catalyst component containing Ti, Mg and halogen, an alkyl-Al compound and a particular electron donor compound selected from the compounds containing at least two oxygen atoms bonded to different carbon atoms and selected by standard tests of reactivity with triethyl-Al and MgCl2 compounds. The catalyst of the invention are used in processes for the (co)polymerization of ethylene to prepare (co)polymers having narrow molecular weight distribution (MWD).
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: October 9, 2001
    Assignee: Basell Technology Company B.V.
    Inventors: Mario Sacchetti, Illaro Cuffiani
  • Publication number: 20010002384
    Abstract: The present invention relates to a process for reducing the mean particle size of resilient porous organic polymer particles having open cell pores, which resist particle size reduction due to the compressibility and resiliency of the organic polymer. Further, the present invention relates to novel products produced by the process for reducing the mean particle size and to particles of reduced mean particle size which have one or more functional agents contained in the pores thereof.
    Type: Application
    Filed: December 27, 2000
    Publication date: May 31, 2001
    Inventor: Thomas J. Clough
  • Patent number: 6153553
    Abstract: Novel catalysts are provided for the polymerization of olefins such as ethylene. These catalysts comprise a novel amorphous aluminophosphate comprising, on a microlevel, sheets of aluminophosphate as well as spheres of aluminophosphate plus a chromium compound. These new catalysts are surprisingly active; result in more co-monomer incorporation than prior art catalysts and reduce the amount of low molecular weight material in the product.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: November 28, 2000
    Assignee: Chevron Chemical Company
    Inventors: Pamela R. Auburn, Theresa A. Pecoraro
  • Patent number: 6133188
    Abstract: A preparation process for a catalytic support, based on a special alumina modified with varying quantities of magnesium chloride is described, a higher rate of MgCl.sub.2 leading to a lesser quantity of heavy molecular chains in the final polymer. The support, prepared by milling the special alumina together with the MgCl.sub.2 previously treated with ethyl benzoate, is impregnated with TiCl.sub.4 in order to create the catalyst. The resulting catalysts show high activity, which enables the metallic residue and chloride eliminating stage to be avoided in the resin so created. Furthermore the types of molecular weight distribution and of mechanical properties are different for the polymers produced.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 17, 2000
    Assignees: Petroleo Brasileiro S.A. - Petrobras, Polialden Petroquimica S.A.
    Inventors: Juan Raul Quijada Abarca, Dellyo Ricardo dos Santos Alvares
  • Patent number: 6114271
    Abstract: Process for the preparation of a catalyst component for the polymerization and copolymerization of ethylene to give ultrahigh-molecular-weight ethylene polymers. Reaction of a Grignard compound with a halogenating agent, a titanium compound, a perhalogen compound and an electron-donor compound and subsequent comminution of the resultant solid to a mean particle size of from 0.5 to 5 .mu.m gives a catalyst component which, together with an organoaluminum compound, results, in the polymerization and copolymerization of ethylene, in ultrahigh-molecular-weight ethylene polymers having a mean particle diameter of from 50 to 200 .mu.m and a viscosity index of greater than 2,000 cm.sup.3 /g. The mean particle diameter can be adjusted by means of the catalyst particle diameter and by means of the catalyst productivity.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: September 5, 2000
    Assignee: Ticona GmbH
    Inventors: Dieter Bilda, Ludwig Boehm
  • Patent number: 6100351
    Abstract: Methods of producing polyolefin polymers by polymerizing an .alpha.-olefin in the presence of a catalyst including a pro-catalyst having a magnesium halide, an aluminum halide, a tetravalent titanium halide, an electron donor, and a silane having the formula R.sub.1 R.sub.2 Si(OR.sub.3) (OR.sub.4), wherein R.sub.1 and R.sub.2 are each an H, C.sub.1-6 alkyl, aryl, C.sub.5-12 cycloalkyl, each of which may be unsubstituted, mono- or di-substituted, and R.sub.3 and R.sub.4 are H, C.sub.1-6 alkyl, or a mono- or di-substituted C.sub.1-6 alkyl, and a co-catalyst comprising an organometallic compound, or reaction products of the pro-catalyst and the co-catalyst, wherein the electron donor is present in an amount sufficient to reduce the stickiness of the resultant polyolefin polymers. Moreover, the polymers produced thereby, and methods of preparing resultant products from the polymers are part of the present invention.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: August 8, 2000
    Assignee: Huntsman Polymers Corporation
    Inventors: Lixin Sun, George C. Allen, Michael P. Hughes
  • Patent number: 6068828
    Abstract: A zirconia powder has an average particle diameter in a range from larger than 0.5 .mu.m to 0.8 .mu.m, and particles of 90 volume percent of the zirconia powder having a diameter of 1.5 .mu.m or smaller. Using this zirconia powder, a zirconia ceramics having uniform quality can be produced. The zirconia powder of the present invention can be efficiently produced by wet-milling a raw material powder using balls under a condition satisfying the following mathematical relation (I):1.times.10.sup.12 .ltoreq.(W.sub.1.sup.2 .div.W.sub.2).times.(.omega..sup.2 .div.d).times.T.ltoreq.1.times.10.sup.14 (I)where W.sub.1 is the weight (g) of balls, W.sub.2 is the weight (g) of the raw material powder, .omega. is the peripheral velocity (cm/min) at outer periphery of a rotor, d is the diameter (cm) of a milling chamber, and T is the milling time (min).
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: May 30, 2000
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kazuo Hata, Norikazu Aikawa, Keijirou Takasaki
  • Patent number: 6043181
    Abstract: Novel catalysts are provided for the polymerization of olefins such as ethylene. These catalysts comprise a novel amorphous aluminophosphate comprising, on a microlevel, sheets of aluminophosphate as well as spheres of aluminophosphate plus a chromium compound. These new catalysts are surprisingly active; result in more co-monomer incorporation than prior art catalysts and reduce the amount of low molecular weight material in the product.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: March 28, 2000
    Assignee: Chevron Chemical Company
    Inventors: Pamela R. Auburn, Theresa A. Pecoraro
  • Patent number: 6018006
    Abstract: A preparation process for a catalytic support, based on a special alumina modified with varying quantities of magnesium chloride is described, a higher rate of MgCl.sub.2 leading to a lesser quantity of heavy molecular chains in the final polymer. The support, prepared by milling the special alumina together with the MgCl.sub.2 previously treated with ethyl benzoate, is impregnated with TiCl.sub.4 in order to create the catalyst. The resulting catalysts show high activity, which enables the metallic residue and chloride eliminating stage to be avoided in the resin so created. Furthermore the types of molecular weight distribution and of mechanical properties are different for the polymers produced.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: January 25, 2000
    Assignees: Petroleo Brasileiro S.A. - Petrobras, Polialden Petroquimica S.A.
    Inventors: Juan Raul Quijada Abarca, Dellyo Ricardo dos Santos Alvares
  • Patent number: 5994256
    Abstract: A process is described for forming a catalyst precursor, for copolymerizing ethylene and an alpha-olefin of 3 to 10 carbon atoms, by preparing a contact mixture of an inert solvent, dibutylmagnesium and tetraalkyl orthosilicate which is free of precipitate and adding silica to the contact mixture to form a slurry to form a supported catalyst precursor. Titanium tetrachloride is then incorporated into the support in a specific ratio to the magnesium and silane components. Activation of this catalyst precursor with a trialkylaluminum compound results in a catalyst system which is effective for the production of ethylene copolymers.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: November 30, 1999
    Assignee: Mobil Oil Corporation
    Inventors: James F. Lottes, Robert I. Mink, Thomas E. Nowlin, Yury V. Kissin
  • Patent number: 5948720
    Abstract: A catalyst for use in the production of flexible polyolefins using a pro-catalyst of (a) a magnesium halide, (b) an aluminum halide, (c) a tetravalent titanium halide, (d) an electron donor comprising at least one of 2,6-lutidine, 6-chloro-2-picoline, or 2,6-dichloropyridine; and (e) a silane having the formula R.sub.1 R.sub.2 Si(OR.sub.3)(OR.sub.4), wherein R.sub.1 and R.sub.2 are each an H, C.sub.1-6 alkyl, C.sub.1-6 aryl, C.sub.5-12 cycloalkane, each of which may be unsubstituted, mono- or di-substituted, and R.sub.3 and R.sub.4 are H, C.sub.1-6 alkane, or a mono- or di-substituted C.sub.1-6 alkane, and a co-catalyst of an organometallic compound, as well as an optional external modifier that may be combined to form a catalyst. Methods for preparing the catalyst, for using the same to produce flexible polyolefin compositions having reduced stickiness and tacticity, and the flexible polyolefin compositions produced thereby are also part of the invention.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: September 7, 1999
    Assignee: Huntsman Polymers Corporation
    Inventors: Lixin Sun, George C. Allen, Michael P. Hughes
  • Patent number: 5714424
    Abstract: The present invention encompasses a monolithic multi-component composite polyolefin catalyst particle comprising at least two distinct supported catalyst components wherein each catalyst component is capable of producing a resin having a melt index different from at least one other catalyst component under constant reaction conditions. Methods of producing and using the multi-component catalyst are disclosed.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: February 3, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: John L. Warthen, Rimantas Glemza
  • Patent number: 5648309
    Abstract: A Ziegler catalyst in which the transition metal component has been prepared by reacting a transition metal compound of titanium, zirconium, vanadium or chromium with a gel-like dispersion of a magnesium alcoholate is used for the preparation of poly-1-olefins, in particular polyethylene. The co-catalyst used is an organoaluminum compound. The polymers are obtained in a high to very high yield, and it is possible to control the particle size distribution of the polymers.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: July 15, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Ludwig Bohm
  • Patent number: 5585447
    Abstract: This catalyst has the general formula VX.sub.3, mAIX.sub.3, nZ, wherein X is a halogen atom, Z is at least one at least partially halogenated, branched or unbranched, saturated hydrocarbon, m is between 0.1 and 10, and n is between 1 and 300. To prepare it, a vanadium halide VX.sub.2 and/or VX.sub.3 is coground with an aluminum halide AlX.sub.3, and then at least one halogenated hydrocarbon Z is added to the mixture obtained in proportions corresponding to the chosen values of m and n. The invention also relates to the (co)polymerization of alpha-olefins at 20.degree.-350.degree. C. in the presence of a catalyst system comprising at least one catalyst as defined above and at least one organometallic activator.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: December 17, 1996
    Assignee: ECP-Enichem Polymeres France S.A.
    Inventors: Emmanuel Adisson, Karel Bujadoux, Michel Fontanille, Alain Deffieux
  • Patent number: 5484754
    Abstract: A process for the polymerization of ethylene or the copolymerization of ethylene with an alpha-olefin, in suspension or in gas phase, in the presence of a catalyst consisting essentially of a cocatalyst and a catalytic component based on at least Mg, Ti and Cl, with the catalytic component being constituted of at least one derivative of magnesium and one chlorinated derivative of titanium in its form III and/or IV, which was subjected, prior to its use, to a reduction treatment and then to treatment with a chlorinated transition metal compound, with the said catalytic component being characterized in that the magnesium derivative is in the form MgCl.sub.2.MgO.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: January 16, 1996
    Assignee: Elf Atochem, S. A.
    Inventors: Roger Spitz, Maryse Patin, Jean Malinge
  • Patent number: 5409875
    Abstract: A polymer supported catalyst comprises Ziegler-Natta catalysts immobilized on a magnesium-modified polymer support. The catalyst support is prepared by (1) dissolving a carboxyl group-containing polymer in a solvent and precipitating the polymer in a polar non-solvent, (2) wet-grinding the precipitated polymer, and (3) mixing the ground polymer with an organomagnesium compound or a complex of an organomagnesium compound and an organoaluminum compound to give a magnesium-modified polymer support. Optionally, the resulting magnesium-modified support is treated with a halogen-containing silicon compound. The catalysts may be loaded onto the support by reacting the magnesium-modified support with a transition metal compound to form a catalyst constituent, and then combining the catalyst constituent with an appropriate organo-metallic compound.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: April 25, 1995
    Assignee: Queen's University
    Inventors: Cheng C. Hsu, Lixin Sun
  • Patent number: 5135899
    Abstract: The invention relates to the improving of a particle structure of carrier compounds for polymerization catalysts, and thereby to the improving of the activity of the entire catalyst, by jet grinding one or more carrier compounds (4), or a mixture of the same, in a grinding chamber in which one or more gas jets (2) transport particles (4) of the material to be ground finely, at such a force against each other and/or against one or more anvils (5) of the jet mill that the particles are pulverized into a finely-divided chemically active carrier.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: August 4, 1992
    Inventors: Thomas Garoff, Timo Leinonen
  • Patent number: 5070056
    Abstract: Catalyst compositions enabling the production of polyalkenes with improved bulk density are prepared by combining the following catalyst components in the following order of addition: first introducing an electron donor component, then adding a reaction product of a di-alkylaluminium halide and a solid component comprising a magnesium di-halide, an electron donor and a halide of tetravalent titanium and lastly adding a tri-alkylaluminium compound.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: December 3, 1991
    Assignee: Shell Internationale Research Maatschappij, B.V.
    Inventors: Ian G. Carson, Petrus A. Bentvelsen
  • Patent number: 5068212
    Abstract: A new highly active olefin polymerization catalyst as disclosed. The catalyst is prepared by contacting a magnesium dihalide with a halogenated titanium alkoxide to obtain a first solid, washing this first solid until it is substantially free of soluble halogenated titanium alkoxide, then contacting the first solid with a titanium tetrachloride to yield a second solid.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: November 26, 1991
    Assignee: Phillips Ptroleum Company
    Inventors: Clifford C. Lee, M. Bruce Welch
  • Patent number: 4888318
    Abstract: A catalyst composition for polymerizing alpha-olefins is prepared by reacting a transition metal compound, e.g., titanium, with trimethylaluminum catalyst activator. In a preferred embodiment, the catalyst is supported on a porous refractory support and is prepared by additionally reacting a magnesium compound or an organomagnesium composition with the support.Also disclosed is a process for polymerizing alpha-olefins in the presence of the catalyst of the invention. The polymer products have higher bulk density and produce films of greater strength than polymers prepared with similar catalysts utilizing different alkyl-aluminum activators, e.g., triethylaluminum and tri-isobutylaluminum.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: December 19, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Luanne M. Allen, Robert O. Hagerty, Richard O. Mohring
  • Patent number: 4847227
    Abstract: A solid catalyst component for olefin polymerization catalysts prepared by suspending diethoxymagnesium (a) in an aromatic hydrocarbon (b) which is liquid at normal temperature and bringing the suspension into a first contact with titanium tetrachloride (c) to form a product and bringing it into a second contact with tianium tetrachloride (c) in such manner that a diester (d) of an aromatic dicarboxylic acid and calcium chloride (e) are allowed to coexist at any stage of the above suspending and/or contacts, the calcium chloride (e) being used in an amount of 1-2 grams per gram of the diethoxymagnesium (a). This solid catalyst component exhibits, when applied to the polymerization of olefins, a surprisingly enhanced polymerization activity per titanium atom and a high stereospecific performance and scarcely necessitates any deashing treatment, thus affording a great economical advantage.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: July 11, 1989
    Assignee: Toho Titanium Co., Ltd.
    Inventors: Atsushi Murai, Minoru Terano, Kohei Kimura, Masuo Inoue, Katsuyoshi Miyoshi