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7619047 |
Dual metallocene catalysts for polymerization of bimodal polymers
This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η 5 -cyclopentadienyl-type ligands, in...
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7598198 |
Rhodium containing catalysts
The present invention addresses at least four different aspects relating to catalyst structure, methods of making those catalysts and methods of using those catalysts for making alkenyl alkanoates....
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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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7566680 |
High surface area iron material prepared from a low surface area iron metal precursor
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...
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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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7518023 |
Highly active spherical metal support catalysts
The invention relates to highly active spherical metal support catalysts with a metal content of 10 to 70% by mass, and a process for their production with the use of a mixture of polysaccharides...
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7514585 |
Process for producing nitrogen-containing compounds
The present invention relates to a process for producing an aliphatic amine, including the step of contacting a linear or branched, or cyclic aliphatic alcohol with ammonia and hydrogen in the...
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7498289 |
Ni catalysts and methods for alkane dehydrogenation
Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of...
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7479529 |
Fluoralcohol leaving group for non-metallocene olefin polymerization catalysts
A catalyst composition and method for olefin polymerization are provided. In one aspect, the catalyst composition is represented by the formula α a β b γ g MX n wherein M is a metal; X is a...
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7435701 |
Catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers
A catalytic composition, including a neutral metal-pair complex, is disclosed, along with a method for its preparation. A method for the polymerization of ethylenically unsaturated monomers using...
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7432220 |
Method for the preparation of olefin polymerization catalyst support and an olefin polymerization catalyst
The invention is directed to a process for producing a particulate support for an olefin polymerisation catalyst wherein a solution of a magnesium compound is contacted with a solution of an...
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7429635 |
Preparation of ultra high molecular weight linear low density polyethylene
Disclosed is a method of preparing an ultra-high molecular weight, linear low density polyethylene with a catalyst system that comprises a bridged indenoindolyl transition metal complex, a...
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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...
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7410926 |
Polymerization process using a supported, treated catalyst system
The present invention relates to a supported, treated catalyst system and its use in a process for polymerizing olefin(s). More particularly, it provides a supported, treated catalyst system...
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7402637 |
Method for producing a poly-1-olefin in the presence of a Ziegler catalyst
The invention relates to a method for producing a poly-1-olefin by polymerization of a 1-olefin of the formula R 4 C═CH 2 , in which R 4 is hydrogen or an alkyl radical having from 1 to 10...
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7384885 |
Catalyst activation and resins therefrom
The present invention relates to the removal of hydrocarbon residues from a catalyst and more specifically the air activation of a catalyst containing hydrocarbon residues. It also relates to...
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7381778 |
Method of preparing a treated support
This invention relates to a method of preparing a supported catalyst comprising the steps of contacting a solid titanium with a supported catalyst compound, and heating the combination to at least...
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7378537 |
Olefin oligomerization catalysts and methods of using same
A metal complex comprising a metal compound complexed to a heteroatomic ligand, the metal complex having Structure X:
wherein R 1 , R 2 , R 3 , and R 4 are each independently an alkyl group, a...
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7348383 |
Spray-dried, mixed metal ziegler catalyst compositions
A Ziegler-Natta catalyst composition comprising a solid mixture formed by halogenation of: Al) a spray-dried catalyst precursor comprising the reaction product of a magnesium compound, a...
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7348384 |
Supported, titanized chromium catalyst and its use for preparing homopolymers and copolymers of ethylene
Novel supported, titanized chromium catalysts for the homopolymerization of ethylene and the copolymerization of ethylene with α-olefins, a process for preparing them and to their use for the...
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7326760 |
Production of broad molecular weight polyethylene
Broad molecular weight polyethylene and polyethylene having a bimodal molecular weight profile can be produced with chromium oxide based catalyst systems employing alkyl silanols. The systems may...
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7294600 |
Supported hybrid metallocene catalyst, method for preparing the same, and method for preparing polyolefin using the same
The present invention relates to a supported metallocene catalyst used for preparing polyolefin whose physical properties and molecular weight distribution can be easily controlled, a method for...
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7271120 |
Catalyst for the synthesis of dimethyl carbonate from urea and methanol, preparation and use thereof
A catalyst for the preparation of dimethyl carbonate from urea and methanol having a composition on weight base of: active component of from 20 to 50 wt %, and carrier of from 80 to 50 wt %, and...
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7271124 |
Process to produce polymers
A process to produce ethylene polymers is provided.
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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...
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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);
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7229943 |
Polymerisation and oligomerisation catalysts
A polymerisation catalyst comprising (1) a transition metal compound of Formula A,
and optionally (2) an activating quantity of a Lewis acid activator. Z is a five-membered heterocyclic group...
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7220805 |
Process for producing contact product; catalyst component for addition polymerization; process for producing catalyst for addition polymerization; and process for producing addition polymer
There are provided (1) a process for producing a contact product, which comprises the step of contacting at least a phthalocyanine complex, a porphyrin complex, or their combination with a...
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7199072 |
Process of producing a supported mixed catalyst system and polyolefins therefrom
A process for preparing a mixed catalyst compound used in the polymerization of polyolefins to produce bimodal polyethylenes is disclosed. In an embodiment, a process of preparing the mixed...
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7199077 |
Fischer-tropsch catalyst prepared with a high purity iron precursor
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...
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7199212 |
Polymerization catalyst for polyesters, polyesters produced with the same and process for producing polyesters
A novel polymerization catalyst for polyesters, which does not contain any germanium or antimony compound as the main component; polyesters produced with the catalyst; and a process for producing...
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7199073 |
Resins that yield low haze films and the process for their production
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are...
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7172987 |
Bimetallic catalyst, method of polymerization and bimodal polyolefins therefrom
Bimetallic catalysts, and methods of producing a bimetallic catalyst comprising a modified Ziegler-Natta catalyst and a metallocene are provided, in one embodiment the method including combining:...
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7153804 |
Catalyst component for ethylene polymerization, the preparation thereof and catalyst comprising the same
The present invention provides a catalyst component for ethylene polymerization, a process for preparing the same, a catalyst comprising the same, and a process for polymerizing ethylene using the...
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7148302 |
Catalyst for polymerization of norbornene
This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing...
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7129302 |
Bimetallic catalyst for producing polyethylene resins with bimodal molecular weight distribution, its preparation and use
Bimetallic catalyst for producing polyethylene resins with a bimodal molecular weight distribution, its preparation and use. The catalyst is obtainable by a process which includes contacting a...
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7122707 |
Method for producing an annular shell catalyst and use thereof for producing acrolein
Coated catalysts which are suitable for the gas-phase catalytic oxidation of propene to acrolein are prepared by a process in which rings are used as supports and water is used as a binder.
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7109277 |
Polymerization catalysts
A process to produce a polymer is provided. The process comprising contacting a treated solid oxide compound, an organometal compound, and an organoaluminum compound in the presence of an alpha...
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7084216 |
Process for the polymerization of olefins
The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst...
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7045481 |
Nanocatalyst anchored onto acid functionalized solid support and methods of making and using same
Supported catalysts include a solid support such as silica that is functionalized to have inorganic acid functional groups attached thereto. Active catalyst particles are supported on the...
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7022639 |
Catalytic activity accelerant used in petroleum hydrogenation
The present invention provides a catalytic activity accelerant. The accelerant is added to stock oil for increasing the catalyst activity, the depth of catalytic hydrogenation and the yield of...
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7019090 |
Catalytic component for the polymerization of olefins obtained by impregnation of a prepolymer with a solution of a catalytic component, prepolymer obtained from the catalytic component and polymerization process using said catalytic component
The present invention relates to a catalytic component for the polymerization of olefins combining a number of catalytic components for the polymerization of olefins and to a process for preparing...
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7019089 |
Suspended chrome catalyst containing titanium and the use thereof for producing ethylene homopolymers and copolymers
Novel supported, titanized chromium catalysts can be used for the homopolymerization of ethylene and the copolymerization of ethylene with α-olefins.
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7001962 |
Olefin polymerization catalyst system
A catalyst system comprises 1) a group 4 organometallic catalyst and 2) an activator comprising a solid zirconium acid component and a metal alkyl. The catalyst system is inexpensive and is highly...
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6995218 |
Metallocene catalysts for olefin or styrene polymerization and polymerization method using the metallocene catalysts
The new metallocene catalysts according to the present invention are prepared by reacting a metallocene compound with a compound having at least two functional groups. The metallocene compound is a...
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6992034 |
Catalyst component for olefin polymerization
A solid catalyst component useful for the (co)-polymerization of olefins is disclosed. The catalyst component is prepared by reacting an activated magnesium halide composite support with a...
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6992033 |
Process for preparation of catalyst composition for ethylene polymerization
Process for preparing a catalyst composition for ethylene polymerization or copolymerization, with the steps of: (a) treating at least one magnesium alkoxide compound with the effluent waste from a...
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6989347 |
Catalysts for the oxidation of unsaturated aldehydes to produce carboxylic acids and methods of making the same
A catalyst composition for the production of carboxylic acids by the oxidation of the corresponding unsaturated aldehydes, and methods for making and using the catalyst compositions. The catalysts...
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6964937 |
Bimetallic catalyst for producing polyethylene resins with bimodal molecular weight distribution, its preparation and use
Bimetallic catalyst for producing polyethylene resins with a bimodal molecular weight distribution, its preparation and use. The catalyst is obtainable by a process which includes contacting a...
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6943224 |
Process for preparing supported transition metal catalyst systems and catalyst systems prepared thereby
A process for forming a coordination catalyst system comprising sequentially or substantially simultaneously contacting: (I) pre-catalyst reactants comprising (a) at least one first...
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