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7414099 Hindered polyalicyclic alkyl catalysts and their use in a gas-phase polymerization reactor  
Embodiments of the present invention include a method of polymerizing olefins comprising contacting olefins with a catalyst composition made by the process of combining a hindered polyalicyclic...
7410927 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...
7410925 Metal compound, and catalyst component and catalyst for addition polymerization, and process for producing addition polymer  
A metal compound obtained by a process comprising the step of contacting, in a specific ratio, a compound represented by the formula BiL 1 r , a compound represented by the formula R 1 s-1 TH, and...
7402546 Magnesium chloride support  
The invention relates to supports comprising inorganic oxide particles coated with magnesium chloride and a method for making them. The inorganic oxide has a mean particle diameter of less than 5...
7393965 Crosslinked metallocene compound for olefin polymerization and method of polymerizing olefin with the same  
The bridged metallocene compound or the olefin polymerization catalyst which comprises the compound, enables high polymerization activity in polymerizing one or more monomers selected from ethylene...
7390861 Cationic group-3 catalyst system  
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic multidentate ancillary ligand and two...
7390764 Organometal catalyst compositions  
This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer This invention also provides catalyst compositions that are useful for...
7384886 Methods of preparation of an olefin oligomerization catalyst  
A method of making a catalyst for use in oligomerizing an olefin comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and...
7384884 Catalyst preparation method  
This invention relates to a method to prepare a supported catalyst system comprising preparing a combination comprising 1) a first supported catalyst system comprising a support, an activator and a...
7368516 Catalyst for trimerization of ethylene and process for trimerizing ethylene using the catalyst  
A catalyst used for trimerization of ethylene into 1-hexene is descrobed, which comprises (i) a specific organometallic complex having a neutral multidentate ligand having a tripod structure, (ii)...
7358381 Racemoselective preparation of bridged metallocene complexes having unsubstituted or 2-substituted indenyl ligands  
The invention relates to a process for preparing racemic metallocene complexes by reacting transition metal complexes with cyclopentadienyl derivatives of alkali metals or alkaline earth metals and...
RE40234 Process for producing crystalline poly-α-olefins with a monocyclopentadienyl transition metal catalyst system  
The invention is a catalytic process using a Group IV B transition metal component and an alumoxane component to polymerize α-olefins to produce high crystallinity and high molecular weight...
7351678 Catalyst systems for Ziegler-Natta propene polymerisation  
The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R′, R...
7341971 Production of olefin polymerization catalysts  
The invention provides a process for producing an olefin polymerization catalyst, comprising an organometallic compound of a transition metal or of an actinide or lanthanide, in the form of solid...
RE40121 Transition metal compound  
The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins.
7323526 Supported metallocene-alkyl catalyst composition  
A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from...
7309677 Supported polymerisation catalysts  
A method for the preparation of a supported transition metal catalyst system which includes the steps of: (i) mixing together in a suitable solvent (a) an aluminoxane and (b) an ionic activator...
7307035 Magnesium dichloride-alcohol adducts and catalyst components obtained therefrom  
The present invention relates to an adduct comprising M g Cl 2 , an alcohol (ROH) in which R is a C1-C10 hydrocarbon group, and a compound containing a transition metal M selected from the Groups 3...
7297806 Manufacture of alpha-olefins  
Alpha-olefin are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected...
7294679 Catalyst support method and polymerization with supported catalysts  
This invention relates to a method to support one or more catalyst compounds comprising contacting the catalyst compounds with a pretreatment agent comprising an aluminum alkyl and or an alumoxane...
7288611 Methods for preparing a rare-earth cis-1,4-polybutadiene rubber with a controlled molecular weight distribution  
Disclosed herein are a method for preparing a cis-1,4-polybutadiene with a controlled molecular weight distribution, comprising polymerizing butadiene monomers using a rare-earth catalyst system...
7279536 Polymer production at supercritical conditions  
Process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally...
7273940 Catalysts for the polymerization of unsaturated compounds  
Bisimine compounds of the formula (I) where the symbols have the following meanings: A is a nonmetal selected from among N, S, O and P, R 1 is a radical of the formula NR 5 R 6 , R 2 is...
7271277 Fulvene, metallocene catalysts and preparation method thereof, and preparation of polyolefines copolymer using the same  
The present invention relates to a novel fulvene compound and a preparation method thereof, and more particularly to a fulvene compound having substituted groups in the 2- and 5-positions, prepared...
7271126 Catalyst for the dehydrogenation of ethyl benzene to STYRENE prepared with a high purity iron precursor  
A method for producing a catalyst for use in the dehydrogenation of ethylbenzene to styrene is disclosed. The catalyst of the present invention comprises a high purity metal and at least one...
7271124 Process to produce polymers  
A process to produce ethylene polymers is provided.
7268095 Transition metal catalysts for (co) polymerizing of olefinic monomers  
A compound of the formula Ia or Ib; where, in the formula Ia, E 1 is O, S, Se, Te, NR, CR 2 , or PR; E 2 , E 3 are each CR, N, or P; E 4 is N, or P; E 5 is OH, SH, NHR, OR′, SR′,...
7259123 Catalytic trimerization and tetramerization of olefinic monomers  
A catalyst precursor composition comprising a) a source of chromium, molybdenum or tungsten; b) a first ligand having the general formula (I);
7250478 Silicon containing cyclopentadienyl ring for metallocene catalyst components  
The present invention refers to a metallocene catalyst component for producing polyolefins according to formula (I) R″ s (CpR n ) g (CpR n ) M Q 3-g (I) or according to formula (II) R″(CpR n...
7247595 Supported metallocene catalyst and olefin polymerization using the same  
A metallocene compound represented by the following Chemical Formula 1: wherein M is a transition metal of Group 4; Cp denotes a cyclopentadienyl ring unsubstituted or substituted by...
7241903 Metallocenes, use in catalyst system for producing olefin polymers  
A metallocene compound of formula (I): wherein M is zirconium, titanium and hafnium; X is a hydrogen atom, a halogen atom or a hydrocarbon radical; R 1 is a linear C 1 -C 20 -alkyl radical; R 2 ...
7238818 Heterocyclic metallocenes and polymerization catalysts  
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the...
7235510 Catalysts  
A tethered ligand comprising the reaction product of an organofunctional silica and a ligand containing a functional group capable of reaction with said organofunctional silica, wherein the...
7232869 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...
7230128 Organometallic fluorenyl compounds, preparations, and use  
Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition,...
7229945 Process of making mixed metal oxide catalysts for the production of unsaturated aldehydes from olefins  
The present invention is for a process for making a catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, said...
7217675 Catalyst composition  
This invention relates to transition metal catalyst compounds represented by the formula: LMX 2 wherein M is a Group 7 to 11 metal; L is a tridentate or tetradentate neutrally charged ligand that...
7211538 Catalytic systems for the polimerization and copolimerization of alpha-olefins  
Catalyst component for the polymerization of alpha-olefins in solution, in suspension, in gas phase at low and high pressure and temperature or in mass at high pressures and high or low...
7208642 Process for preparation of formate esters or methanol and catalyst therefor  
A production process and a catalyst are provided, which can be less decreased in activity of the catalyst even when CO 2 , water and the like are present in the starting material and/or the...
7208437 Catalyst and method for its manufacture  
A catalyst is synthesized by a method in which a catalytic metal such as platinum or another noble metal is dispersed onto a support member. A transition metal macrocycle is also adsorbed onto the...
7205364 Olefin polymerization catalysts  
The invention is a catalyst system including a Group IV B transition metal component and an alumoxane component which may be employed to polymerize olefins to produce a high molecular weight polymer.
RE39561 Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts  
The novel metallocenes of the formula I in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, —(CR 8 R...
7202373 Monocyclopentadienyl complexes  
Monocyclopentadienyl complexes in which the cyclopentadienyl system bears at least one uncharged donor bound via a boron-containing bridge and comprising one or more atoms of group 15 and/or 16 of...
7199195 Polyethylene resins  
The invention provides ethylene/α-olefin copolymers exhibiting improved environmental stress cracking resistance properties, and methods for the production of the copolymers in a single reactor by...
7199075 Organometallic complexes that comprise bidentate chelating ligands that combine a nitrogen-containing heterocyclic compound with an alcohol and their use for catalyzing the oligomerization of olefins  
A catalyst for the oligomerization of olefins, especially ethylene contains: at least one nickel complex e.g. Li 2 Ni X 2 that results from bringing into contact a nickel salt e.g. a...
RE39532 Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts  
The novel metallocenes of the formula I in which, preferably, M 1 is Zr or Hf, R 1 and R 2 are alkyl or halogen, R 3 and R 4 are hydrogen, R 5 and R 6 are alkyl or haloalkyl, —(CR 8 R...
7196148 Cationic catalyst system  
A 3+ metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by a anionic multidentate ligand and at least two monoanionic ligands. The...
7193099 Racemoselective preparation of isolable ansa-metallocene biphenoxide complexes  
The invention relates to a process for preparing racemic metallocene biphenoxide complexes by reacting bridged transition metal complexes with cyclopentadienyl derivatives of alkali metals or...
7192902 Polymerization process with mixed catalyst compositions  
The application describes a mixed olefin polymerization catalyst composition comprising a support, a reaction product of at least one first organometallic compound and a first activator capable of...
7189675 Olefin polymerization catalyst on plasma-contacted support  
A method for preparing an olefin polymerization catalyst is disclosed. An inorganic oxide is contacted with plasma and a transition metal compound is supported on the contacted inorganic oxide. The...
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