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7612245 |
Method for selective hydrogenation of polyunsaturated compounds into monounsaturated compounds using a homogeneous catalyst
A process for the selective hydrogenation of diolefinic compounds to mono-olefinic compounds uses a catalyst composition comprising at least one salt of a transition metal from groups IB, IIB, VB,...
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7612009 |
Process for homo-or copolymerization of conjugated olefines
Metal complexes, catalyst compositions containing the metal complexes, and processes for making the metal complexes and the catalyst compositions are described for the manufacture of polymers from...
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7605215 |
Process for producing olefin copolymerization catalyst and process for producing olefin copolymer
A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a...
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7598328 |
Supported catalysts for manufacture of polymers
A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising:
...
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7598200 |
Ionic liquids for heterogenising metallocene catalysts
The present invention discloses a method for preparing an heterogeniseded catalyst component comprising the steps of: a) providing a halogenated precursor component of formula (I) —X—[—CH 2...
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7595413 |
Phosphine-substituted vinyl containing metallocene catalyst, preparation process and the application of the same
The invention relates to a phosphine-substituted vinyl containing metallocene catalyst, and also to the preparation process of the same as well as to the application of the catalyst. The catalyst...
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7592402 |
Process for producing modified particle; carrier; catalyst component for addition polymerization; process for producing catalyst for addition polymerization; and process for producing addition polymer
A process for producing a modified particle, which comprises the step of contacting a compound (a) defined by the formula, M 1 L 1 3 , a compound (b) defined by the formula, R 1 t-1 TH, a compound...
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7592286 |
Process for the preparation of a catalyst component and components therefrom obtained
A process for preparing a catalyst component, comprising a Mg compound a Ti compound and an electron donor compound (ED) selected from alcohol, glycols, esters, ketones, amines, amides, nitrites,...
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7589160 |
Process for preparing 1-butene polymers
A process for obtaining 1-butene polymers comprising the step of contacting under polymerization conditions 1-butene and optionally ethylene, propylene or said alpha-olefin, in the presence of a...
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7589042 |
Arylphenoxy catalyst system for producing ethylene homopolymer or copolymers of ethylene and α-olefins
Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and α-olefins, and a method of producing an ethylene homopolymer or copolymers of...
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7585805 |
Nickel-based catalyst composition
A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a nickel-containing compound, (b) an alkylating agent, (c) a fluorine-containing compound,...
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7582712 |
Alpha-olefins polymerization catalyst
Methods and apparatus to form a catalyst precursor, comprising combining in a reactor magnesium, an alkoxysilane compound, a halogenized silicon compound, a halogenized transition metal compound, a...
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7582711 |
Ziegler-type catalysts having increased productivity
The present invention relates to catalyst systems for polyolefin production, and more particularly, to catalyst systems for polyolefins used in producing films.
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7579417 |
Metallocene compounds
A metallocene compound of formula (I) wherein: M is an atom of a transition metal; X, same or different, is a hydrogen atom, a halogen atom, or a R, OR, OSO 2 CF 3 , OCOR, SR, NR 2 or PR 2 group,...
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7579416 |
Catalyst system for olefin polymerization
The present invention relates to a catalyst system for olefin polymerization comprising an organic transition metal compound and, as cocatalyst, an ionic compound made up of anions of the formula...
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7576163 |
Polymerization catalysts for producing polymers with low levels of long chain branching
This invention relates to catalyst compositions, methods, and polymers encompassing at least one Group 4 metallocene compound comprising bridging η 5 -cyclopentadienyl-type ligands, typically in...
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7569713 |
Hydrogenated catalyst
The invention discloses a method for making a hydrogenated metallocene catalyst component comprising the steps of: 1. Providing a compound comprising at least one aromatic group; 2. Hydrogenating...
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7566679 |
Cocatalyst for the production of linear alpha-olefins
The invention relates to a homogeneous catalyst for the production of linear alpha-olefins by oligomerisation of ethylene, consisting of a zirconium salt of organic acids and a cocatalyst which...
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7566677 |
De-foaming spray dried catalyst slurries
A method for preparing a spray dried catalyst and a low viscosity, low foam spray dried catalyst system for olefin polymerization are provided. In one aspect, the method includes preparing a...
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7566676 |
Preparation method of solid titanium catalyst for olefin polymerization
The present invention relates to a preparation method of solid titanium catalyst for olefin polymerization comprising the steps of: (1) preparing a magnesium compound solution by dissolving a...
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7560521 |
Components and catalysts for the polymerization of olefins
A catalyst component for the polymerization of olefins comprising a titanium compound, a Mg-dihalide, a difunctional electron donor compound (ED) selected from diesters, diketones, diamines or...
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7557171 |
Halogen substituted metallocene compounds for olefin polymerization
A metallocene compound comprising a transition metal, a first substituted or unsubstituted indenyl or fluorenyl ligand pi—bonded to the transition metal, a second monoanionic ligand bonded to the...
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7550543 |
Polymer-based composites comprising carbon nanotubes as a filler, method for producing said composites, and associated uses
The invention relates to a method for producing carbon nanotubes in a dispersed state. The method comprises a stage whereby polymerization is carried out from at least one so-called monomer of...
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7547654 |
Catalytic system for obtaining conjugated diene/monoolefin copolymers and these copolymers
A catalytic system usable for the copolymerization of at least one conjugated diene and at least one monoolefin, a process for preparing this catalytic system, a process for preparing a copolymer...
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7547357 |
Transparent film-forming composition
A composition for forming a transparent film, comprising photocatalytic particles; zirconium ammonium carbonate; a cohydrolysis-polycondensation product of an aluminum alkoxide represented by the...
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7544762 |
Catalyst for preparation of polyester and process for preparing polyester using the catalyst
A polyester having a good color tone (a high L value and a low b value) and a low acetaldehyde content is obtained by using a catalyst containing a reaction product of (A) a titanium compound (1)...
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7534842 |
Catalysts for olefin polymerization
This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a...
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7531608 |
Transition metal complexes, catalyst compositions containing the same, and olefin polymerization using the catalyst compositions
Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amine-based group is introduced is coordinated, a method of synthesizing the same, and olefin...
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7531478 |
Production of supported olefin polymerisation catalysts
The invention provides a process for producing an olefin polymerisation catalyst, comprising suspending a porous particulate support material in a liquid/liquid two phase system, which comprises a...
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7528091 |
Magnesium-containing carrier component and application to olefin polymerization
Solid fine particles which contain a magnesium atom, an aluminum atom and a C 1-20 alkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3...
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7525009 |
Trimerisation of olefins
The invention describes a process for trimerisation olefins, which process includes the step of contacting an olefinic feedstream with a catalyst system which includes a transition metal compound...
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7524906 |
Process for the preparation of a metal-organic compound comprising at least one imine ligand
The invention relates to a process for the preparation of a metal-organic compound, comprising at least one imine ligand, characterized in that an imine ligand according to formula 1, or the HA...
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7524789 |
Process for producing modified particle, carrier or catalyst component for addition polymerization, pre-polymerized catalyst component therefor, catalyst therefor, and addition polymer
A process for producing a modified particle, a carrier or a catalyst component for addition polymerization, which comprises the steps of (1) contacting a compound (a) represented by the defined...
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7521512 |
Catalyst composition and polymerization process using mixture of silane electron donors
A catalyst composition for the polymerization of olefins comprising the combination of one or more Ziegler-Natta procatalysts comprising one or more transition metal compounds; one or more aluminum...
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7517940 |
Catalyst composition including transition metal complexes and olefin polymerization using the same
Provided is catalyst composition including a transition metal complex precatalyst represented by Formula 1; a first cocatalyst represented by Formula 2 which is an alkylaluminum compound; and a...
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7514387 |
Reformer and method of making the same
A reformer comprises a housing; a substrate disposed in the housing, wherein the substrate comprises a stabilized aluminate and a stabilized zirconate; and a catalyst disposed on the substrate.
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7511183 |
Tetramerization of olefins
The invention describes a process for tetramerisation of olefins wherein the product stream of the process contains more than 30% of the tetramer olefin. The process includes the step of contacting...
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7507782 |
Transition-metal complexes with tridentate, nitrogen-containing ligands
Transition metal complexes with tridentate, nitrogen-containing, uncharged ligand systems, a catalyst system comprising at least one of the transition metal complexes, the use of the catalyst...
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7504354 |
Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins
The present invention relates to organometallic transition metal compounds of the formula (I), a catalyst composition comprising at least one of the organometallic transition metal compound and an...
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7498390 |
Chromium complexes and their use in olefin polymerization
A composition having the formula I
where R 1 and R 2 are independently hydrogen, C 1 to C 12 linear and branched alkyl, C 3 to C 12 cycloalkyl, aryl, C 1 to C 12 alkoxy, F, Cl, SO 3 , C...
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7482414 |
Transition metal complex ligand and olefin polymerization catalyst containing transition metal complex
The invention provides a transition metal complex of formula (3) below:
wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are the same or different and each independently...
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7482413 |
Magnesium dichloride-alcohol adducts and catalyst components obtained therefrom
The present invention relates to MgCl 2 .(EtOH), m (ROH) n (H 2 O) p adduct in which R is a C1-C15 hydrocarbon group different from ethyl, n and m are indexes, higher than 0, satisfying the...
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7473664 |
Formation of Ziegler-Natta catalyst
Methods of forming polyolefins and catalysts are described herein. Such methods generally include forming Ziegler-Natta catalyst compounds in the absence of one or more blended compounds typically...
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7470759 |
Isotactic-atactic polypropylene and methods of making same
A method of producing a polymer comprising contacting in a reaction zone under conditions suitable for polymerization of an alpha-olefin monomer with a metallocene catalyst having at least three...
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7470758 |
Polymerization catalysts for producing polymers with low levels of long chain branching
This invention relates to catalyst compositions, methods, and polymers encompassing a Group 4 metallocene with bridging η 5 -cyclopentadienyl-type ligands, in combination with a cocatalyst and an...
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7468452 |
Process for one-pot synthesis of 1,1-diphenyl-1-(3-substituted-cyclopentadienyl)-1-(2,7-di-t-butyl-fluoren-9-yl)methane type ligands
The present invention is directed to a method of making a ligand which can be used to form an ansa-metallocene. Further, the present invention is directed to a method of making the...
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7468416 |
Catalyst composition for olefin polymerization
A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an...
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7468339 |
Diketonate complex-derived catalysts useful for preparing polyolefins
An olefin polymerization catalyst may be prepared using a process including contacting a metal compound of the formula M(OR 1 ) 2 with a diketone to form a catalyst precursor having the general...
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7465818 |
Process for the racemoselective synthesis of ansa-metallocenes
A process for the racemoselective preparation of ansa-metallocene complexes of the formula (I),
where
R 1 , R 1′ , R 2 , R 2′ are identical or different and are each hydrogen or an...
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7456126 |
Ziegler-natta catalyst for olefin polymerization including aryloxy group and method for polymerization of olefin using same
The present invention relates to a Ziegler-Natta catalyst for olefin polymerization and a method for polymerization of olefin using the same. Specifically, the invention relates to a Zeigler-Natta...
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