Abstract: There are disclosed: (1) a process for producing a catalyst for ethylene polymerization, which comprises the step of contacting with one another: (i) a solid catalyst component containing at least titanium, magnesium and halogen atoms; (ii) an organoaluminum compound; and (iii) a heterocyclic compound; and (2) a process for producing an ethylene polymer, which comprises the step of polymerizing ethylene, or ethylene and at least one kind of an addition polymerizable comonomer other than ethylene, in the presence of the above-mentioned catalyst.

Abstract: A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of a passivating compound selected from the group of oxygen, oxygen-containing compounds, and nitrogen-containing compounds.

Abstract: A catalyst composition for polymerising ethylene with a superior activity, productivity, and giving, in particular, copolymers with an improved narrower short chain branching distribution, and especially an improved cling development in PIB formulated films. The catalyst composition for the (co-)polymerisation of ethylene, optionally with an alpha olefin of 3 to 10 carbon atoms, has a catalyst precursor and an organoaluminium cocatalyst, wherein the catalyst precursor has i) a catalyst carrier material, having from 0.3 to 1.2 mmoles of OH groups per gram of catalyst carrier; ii) a dialkylmagnesium compound of the formula RMgR1, where R and R1 are the same or different C2-C12 alkyl groups, in an amount between 1.1 and 2.4 mmoles of diakylmagnesium per gram of catalyst carrier; iii) a tetraalkyl orthosilicate, in which the alkyl group contains from 2 to 6 carbon atoms, in an amount between 0.4 and 1.

Abstract: A method and catalyst system for economically producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the present invention provides a method of carbonylating aromatic hydroxy compounds by contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system that includes a catalytic amount of an inorganic co-catalyst containing zinc. In various alternative embodiments, the carbonylation catalyst system can include an effective amount of a palladium source and an effective amount of a halide composition. Further alternative embodiments can include catalytic amounts of various inorganic co-catalyst combinations.

Abstract: Described are catalyst systems having aluminium alkyl complexes of the formula (I) described herein applied to magnesium chloride, SiO2 or SiO2 in combination with MgCl2 as support in the presence of titanium halides or vanadium halides and internal and, if desired, external donors act both as cocatalysts and as stereoselectivity promoters in heterogeneous polymerizations of &agr;-olefins. Also described are polymerization methods using these catalyst systems.

Abstract: A process is provided for preparing a catalyst support for polymerizing &agr;-olefins comprising the steps of: (i) reacting, in the presence of a first electron donor, a chlorine-containing organic compound and a prior mixture of an alkylmagnesien and an aluminoxane and/or aluminosiloxane and/or alkylaluminum and, optionally, a second electron donor; and (ii) activating a product from step (i) in suspension in an inert liquid by means of an activation electron donor, together with the support thus obtained, a catalyst for polymerizing &agr;-olefins, comprising this catalyst support and a group IV transition metal halide, and a process for polymerizing &agr;-olefins, particularly propylene, comprising contacting the &agr;-olefin with the catalyst.

Abstract: An olefin polymerization catalyst comprising the following components (A) and (B): Component (A): an ion-exchange layered silicate having an acid site of at most −8.2 pKa, the amount of the acid site is equivalent to at least 0.05 mmol/g of 2,6-dimethylpyridine consumed for neutralization; and Component (B): a compound of a transition metal belonging to Group 3 to Group 12 of the Periodic Table.

Abstract: A catalyst system for the polymerization of olefins is prepared by initially charging one or more compounds of the formula I a or I b, 1

Abstract: Catalyst components for the preparation of ethylene (co)polymers capable to produce polymers with high bulk density, to avoid the problems of formation of fines and that have a high activity are provided. Said catalyst components are characterized by comprising a non-stereospecific solid catalyst component, comprising a titanium compound and a magnesium dihalide, which is pre-polymerized with an alpha olefin CH2═CHR1 wherein R is a C1-C8 alkyl group, to such an extent that the amount of the &agr;-olefin pre-polymer is up to 100 g per g of said solid catalyst component.

Abstract: Catalyst support containing an &agr;-olefin polymer which is in the form of particles of mean size from 5 to 350 &mgr;m in which the pore volume generated by the pores of radius from 1,000 to 75,000 Å is at least 0.2 cm3/g. Catalyst usable for the polymerization of &agr;-olefins, including a compound containing at least one transition metal belonging to groups IIIb, IVb, IVb and VIb of the Periodic Table, bound in or on this support.

Abstract: A process is provided for the preparation of a solid catalyst component for the polymerization of olefins, comprising continuously feeding a liquid containing a titanium compound having at least one titanium-halogen bond into a vessel containing a solid comprising a magnesium halide and continuously discharging liquid from the vessel, whereby the concentration of the solid is maintained within the range of between 80 and 300 g/l, and the product between the average residence time of the liquid in the vessel and the concentration of the solid is maintained below 10,000 min*g/l. An advantage of the process is the reduced time and reactor volume necessary to prepare the catalysts, which show good activity and stereospecificity.

Abstract: There are disclosed: (1) a process for producing a catalyst for olefin polymerization, which comprises the step of contacting with one another: (i) a solid catalyst component containing at least titanium, magnesium and halogen atoms, (ii) an organoaluminum compound, and (iii) a compound selected from the group consisting of (a) an oxygen-containing compound having a structure wherein at least two hydrocarbyloxy groups are bound to the same carbon atom, and (b) a cyclic ketone compound, and (2) a process for producing an olefin polymer, which comprises the step of polymerizing an olefin in the presence of the above-mentioned catalyst.

Abstract: A solid titanium complex catalyst for polymerization and copolymerization of ethylene is prepared by the process comprising: (1) preparing a magnesium solution by reacting a halogenated magnesium compound with an alcohol; (2) reacting the magnesium solution with an ester compound having at least one hydroxyl group and a silicon compound having an alkoxy group to produce a magnesium composition; and (3) producing a solid titanium catalyst through recrystallization by reacting the magnesium composition solution with a mixture of a titanium compound and a haloalkane compound; and optionally reacting the solid titanium catalyst with an additional titanium compound. The solid titanium complex catalyst for polymerization and copolymerization of ethylene according to present invention exhibits high catalytic activity, high hydrogen reactivity and controlled particle size, and can advantageously used in the polymerization and copolymerization of ethylene to produce polymers of high bulk density.

Abstract: The present invention relates to a composition of carboxylate metal salt and a flow improver useful in combination with a polymerization catalyst to improve the flowability and bulk density of the catalyst. The invention also relates to a polymerization process using the catalyst.

Abstract: The catalyst for polymerizing vinyl compounds according to the present invention comprises (A) a complex of Group 4 to 10 transition metal of the Periodic Table, (B) a clay, clay mineral or ion-exchangeable layered compound, and (C) at least one aluminoxy compound represented by Formula (1): 1

Abstract: The present invention relates to catalyst components for the polymerization of olefins comprising a titanium compound, having at least a Ti-halogen bond, and at least two electron donor compounds supported on a Mg dihalide, said catalyst component being characterized by the fact that at least one of the electron donor compounds is selected from ethers containing two or more ether groups which are further characterized by the formation of complexes with anhydrous magnesium dichloride in an amount less than 60 mmoles per 100 g of MgCl2 and by the failure of entering into substitution reactions with TiCl4 or by reacting in that way for less than 50% by moles, and at least another electron donor compound is selected from esters of mono or polycarboxylic acids. Said catalyst components are able to produce propylene polymers which, for high values of xylene insolubility, show a broad range of isotacticity.

Abstract: A polypropylene catalyst (no more than 2 wt % titanium) contains at least one titanium-halogen bond-containing compound, internal donor, and activated, amorphous magnesium dihalide support, essentially free of alkoxy functionality.

Abstract: A method of halogenating a precursor to form a polymerization procatalyst is disclosed whereby a magnesium/transition metal-containing alkoxide complex precursor is contacted with a halogenating agent selected from alkylaluminum halide, TiX4, SiX4, BX3, and Br2, where halide and X are reach respectively a halogen, and when an alkylaluminum halide, TiX4, SiX4, BX3, and Br2 are used as the halogenating agent, they are used together or in combination in a multi-step halogenation. The procatalyst then can be converted to an olefin polymerization catalyst by contacting it with a cocatalyst and optionally a selectivity control agent, and used to polymerize olefins in high yield with desired properties.

Abstract: The invention provides a process for producing polypropylene and/or random copolymers of propylene type using a stereoregular catalyst which comprises a titanium-containing solid catalyst component (A), an organoaluminum compound (B) and if required an organosilicon compound (C), wherein [I] before carrying out homopolymerization of propylene or random copolymerization of propylene with an &agr;-olefin other than propylene, the above component (A), an organoaluminum compound (B′) and if required an organosilicon compound (C′) are used, and a small amount of propylene or ethylene and/or an &agr;-olefin of 4-20 carbon atoms for pre-activation treatment is supplied to the above component (A), and [II] a catalyst which is prepared by adding an organosilicon compound (C″) to the pre-activated stereoregular catalyst in a molar ratio of 0.1-50 as Si/Ti, is used to produce polypropylene or propylene random copolymers.

Abstract: A catalyst system comprising an oxidizing agent, a titanium complex represented by the formula, Z R″mZ′TiQkA1 (wherein Z and Z′ represent &pgr;-bonding ligand or &sgr;-bonding ligand; R″ represents abridging moiety; Q represents straight or branched an alkyl, aryl, alkenyl, alkylaryl, arylaklyl group or a halogen atom; A represents a counteranion; k is an integer from 1 to 3; l is an integer from 0 to 2; and m is an integer from 0 to 3 and a Lewis acid compound.

Abstract: A Ziegler-Natta type catalyst having an improved hydrogen response provides for narrowing of the MWD of resulting polyolefins polymerized using such catalyst, with such catalyst generally made by a) contacting a soluble magnesium dialkoxide compound of the general formula Mg(OR′)2 with a halogenating agent capable of exchanging one halogen for one alkoxide to form a reaction product A, where R′ is a hydrocarbyl or substituted hydrocarbyl having from 1 to 20 carbon atoms; b) contacting reaction product A with a first halogenating/titanating agent to form reaction product B; and c) contacting reaction product B with a second halogenating/titanating agent to form a catalyst component; wherein in at least one of steps b) and c), the halogenating/titanating agent is a blend of Ti(OPr)4 and TiCl4. Catalyst components, catalysts, catalyst sytems, polyolefin polymers, and methods of forming each are disclosed.

Abstract: The invention relates to a process for uniformly dispersing a transition metal metallocene complex on a carrier comprising

Abstract: The invention is directed to a process for the preparation of a catalyst component for the polymerization of an olefin by:

Abstract: The invention relates to a catalyst system, containing at least one metallocene, at least one co-catalyst, at least one supporting material and optionally additional organometallic compounds. The catalyst system can be used advantageously for polymerising olefins, as it obviates the use of aluminoxanes, such as methylaluminoxane (MAO), which is conventionally used in excess quantities as a co-catalyst, whilst at the same time producing strong catalyst activity and excellent polymer morphology.

Abstract: An olefin polymerization catalyst comprising: (A) a solid catalyst component prepared by contacting (a) a dialkoxyl magnesium, (b) a tetra-valent titanium halide, and (c) a phthalic acid diester in (d) an aromatic hydrocarbon having a boiling point in the range of 50 to 150° C., (B) an organoaluminum compound of the formula R1pAlQ3-p, one or more compounds selected from the group consisting of (C) one or more halogen-containing organosilicon compounds selected from (C1) a halogen-containing organosilicon compound of the formula R21Si(OR3)4-l-mXm and(C2) a halogen-containing organosilicon compound of the formula R4qSi(OR5)4-q, and (D) an organosilicon compound of the formula R6sSi(OR7)4-s. The catalyst exhibits excellent activity to hydrogen and the same catalytic activity and yield performance as conventional catalysts, and possesses the capability of producing polymers with stereoregularity equivalent to conventional catalysts.

Abstract: A lower &agr;-alkene polymerisation heterogeneous solid catalyst which comprises a hydrated magnesium chloride derived procatalyst, a cocatalyst comprising an organoaluminium compound and a selectivity control agent comprising an ester or ether. The procatalyst comprises a titanium tetrahalide supported on a magnesium chloride ester complex precursor. The internal electron donor ester component of the precursor is generated insitu by reaction of a magnesium chloride alcoholate with an activated carbonyl compound in the mole ratio 0.5-1:10-20. The magnesium chloride alcoholate is formed of hydrated magnesium chloride and an aliphatic alcohol in the mole ratio of 0.5-1:10-20. The mole ratio of the aluminium to the titanium is 10-300:1 and that of the selectivity control agent to titanium is 10-100:1. The process for the preparation of the catalyst comprises mixing a hydrated magnesium chloride derived procatalyst, a cocatalyst and a selectivity control agent.

Abstract: The present invention relates to a composition of carboxylate metal salt and a flow improver useful in combination with a polymerization catalyst to improve the flowability and bulk density of the catalyst. The invention also relates to a polymerization process using the catalyst.

Abstract: A process for the production of a magnesium chloride powder for use in a catalyst, the process comprising vaporising magnesium chloride in a plasma torch and quenching the vapour with a liquid containing an electron donor to form a magnesium chloride-based powder catalyst wherein at least 80% by weight of the magnesium chloride is present as the hexagonal phase thereof. The invention also relates to a precursor for such a catalyst.

Abstract: The invention provides new prepolymerized catalyst components for the (co)polymerization of olefins CH2═CHR, wherein R is hydrogen or a C1-C12 alkyl group, characterized by comprising a solid catalyst component, comprising Ti, Mg, halogen and an electron donor compound, being capable of yielding, under standard polymerization conditions, a propylene homopolymer having an insolubility in xylene at 25° C. higher than 90%, which is prepolymerized with ethylene to such an extent that the amount of the ethylene prepolymer is up to 100 g per g of said solid catalyst component. These solid catalyst components display to obtain a high catalyst activity, a high isotactic index, and are not affected by aging.

Abstract: Disclosed are compounds of the following core structure, and their use as polymerization catalysts: wherein M1 is a group lVb transition metal, R5 is a substituted aryl group, and Ra forms a heteroatom-containing ring fused to the cyclopentadienyl ring.

Abstract: A catalyst composition suitable for the (co)polymerization of alk-1-enes is obtainable by mixing a metallocene complex with a C3-C20-alk-1-ene in an inert solvent, reacting the resulting mixture in a controlled manner with a compound capable of forming metallocenium ions and diluting the resulting mixture with an inert nonpolar, essentially aliphatic solvent, and also, if desired, applying the catalyst composition to a particulate support material.

Abstract: A spray-dryable composition is provided, comprising a catalyst compound, an activator for the catalyst compound, and at least one compound selected from among siloxanes, polyethylene glycols and crown ethers, the composition optionally further comprising a filler. There are further provided a method of spray-drying such a composition, and polymerization processes which employ such spray-dried compositions.

Abstract: A catalyst comprising an organoaluminum compound and a vanadium chelate compound having the lability to cause olefins to undergo living coordination polymerization is contacted with a terminal diolefin to obtain a catalyst for living polymer production. When the above contact is:conducted in the presence of a cycloolefin or an internal olefin, the yield of a living polymer can be improved. By modifying all ends of the living polymer obtained, a telechelic olefin polymer is obtained in which all the polymer chains are modified with functional groups.

Abstract: Supported catalysts for the polymerization of olefins comprise the following components: (A) a porous organic support functionalised with groups having active hydrogen atoms; (B) an organo-metallic compound of aluminium containing heteroatoms selected from oxygen, nitrogen and sulphur; and (C) a compound of a transition metal selected from those of groups IVb, Vb or VIb of the Periodic Table of the Elements, containing ligands of the cyclopentadienyl type. These supported catalysts, obtainable in the form of spherical particles, can be used in the polymerization reaction of olefins either in liquid or in gas phase, thus producing polymers endowed with a controlled morphology and with a high bulk density.

Abstract: The invention relates to a catalyst component which can provide, in combination with a transition metal compound, a catalyst for ethylenically unsaturated monomer polymerization, a catalyst comprising the catalyst component and a transition metal compound, and a process for ethylenically unsaturated monomer polymerization using the catalyst. The catalyst component comprises a compound obtained by the reaction of, in any order, (i) a compound comprising a metal of Group 13 of the periodic table; (ii) a compound capable of reacting with the compound (i) to be bonded to two or more of the Group 13 metal; (iii) a compound capable of reacting the compound (i); and optionally (iv) a hydrocarbon compound or the like.

Abstract: A polymerization system for ring opening polymerization of cycloolefins, comprising a catalyst [MoOX2L2], a Lewis acid as co-catalyst, and a chain-transfer agent, wherein (1) both X groups are the same halogen atom selected from the group consisting of Cl and Br, and both L groups are the same halogen atom as X; or (2) both of the X groups are the same halogen atom selected from the group consisting of Cl and Br, and both of the L groups are the same straight chain or branched alkyl group having 1-4 carbon atoms; or (3) both X groups are the same halogen atom selected from the group consisting of Cl and Br, and both L groups are the same straight chain or branched alkoxy group having 1-4 carbon atoms; or (4) both X groups are the same alkyl group having 1-4 carbon atoms, and both L groups are the same alkoxy group having 1-4 carbon atoms; or (5) one X group is a halogen atom selected from the group consisting of Cl and Br, and the other X group together with both L groups cons

Abstract: A catalyst composition has a catalyst component which includes a metallocene transition metal compound, a magnesium compound, a hydroxyl containing compound, and a polymeric material. The catalyst component may also include asilicon compound and an aluminum compound. The catalyst component is combined with a cocatalyst and used in olefin polymerization.

Abstract: The invention relates to a novel process for the preparation of an olefin polymerization catalyst component comprising magnesium, titanium, a halogen and an electron donor.

Abstract: The invention provides olefin(s) polymerization catalyst compositions that include at least one tridentate ligand coordinated to the transition metal by one datively bonded heteroatom and two anionically bonded heteroatoms.

Abstract: The olefin polymerization catalyst comprises a supported transition metal, magnesium and halogen; the support comprises aluminum phosphate and at least one oxide of silica or alumina. The catalyst is formed by impregnating the support with a liquid complex formed by reacting a magnesium compound and a transition metal compound, which can contain either oxygen or halogen, and then precipitating the complex on the support with an organoaluminum compound which may be halogenated. The catalyst is used with an organometallic cocatalyst.

Abstract: A catalyst composition that is the combination of or the reaction product of ingredients including an iron-containing compound, a hydrogen phosphite, and a mixture of two or more organoaluminum compounds. This catalyst composition is particularly useful for polymerizing conjugated dienes. When this catalyst composition is used to polymerize 1,3-butadiene into syndiotactic 1,2-polybutadiene the ratio of the organoaluminum compounds can be adjusted to vary the melting temperature and molecular weight of the polymer product.

Abstract: The present invention is directed to a coordinating catalyst system comprising at least one bidentate or tridentate ligand containing pre-catalyst transition metal compound, (e.g., 2,6-bis (2,4,6-trimethylarylamino)pyridyl iron dichloride), at least one support-activator (e.g., spray dried silica/clay agglomerate), and optionally at least one organometallic compound (e.g., triisobutyl aluminum), in controlled amounts, and methods for preparing the same. The resulting catalyst system exhibits enhanced activity for polymerizing olefins and yields polymer having very good morphology.

Abstract: Catalyst composition for use in the polymerization of olefins comprise neutral metal complexes together with activators comprising non-aromatic boron compounds. Suitable activators are triisobutylboron together with trialkylaluminium compounds. Preferred complexes are metallocenes. The use of such activating systems obviates the need for expensive aluminoxanes or aromatic fluorine containing compounds.

Abstract: A method of polymerizing at least one olefin comprising contacting the olefin with a catalyst composition comprising: 1) a procatalyst composition comprising a magnesium and titanium-containing component and an electron donor compound of the structure: wherein R1 is ethoxy, and R2 is an alkoxy group having from one to ten carbon atoms, and R3-R6 are each individually, hydrogen, hydrocarbyl, hydrocarboxy, nitro, a silyl group or a halogen, 2) a cocatalyst and optionally 3) a selectivity control agent.

Abstract: The present invention relates to a silica gel-supported catalyst component suitable for ethylene (co)polymerization, a catalyst therefrom and use of the same. The catalyst component according to the present invention is obtained by supporting the reaction product of a titanium compound, a halide promoter, a magnesium compound and an electron donor on silica gel having a larger specific surface area. When the resultant catalyst is used for ethylene polymerization, especially gas phase fluidized bed polymerization, not only the activity is substantially enhanced, but also the hydrogen response, copolymerizability of ethylene with other alpha-olefins, and the like are improved. The catalyst is especially suitable for the fluidized bed polymerization operated in a condensed state, with high quality LLDPE resins being obtained.

Abstract: The invention is directed to organometallic catalysts prepared by a process comprising a) combining nucleophilic group-containing particulate support material with an arylboron or arylaluminum Lewis acid compound in the presence of a Lewis base compound; b) contacting the product of a) with a trialkylaluminum compound before combining said product with a metal precursor compound capable of activation for olefin polymerization by said product a); and, c) combining the product of b) with said metal precursor compound. These catalyst compositions are suitable for addition reactions of ethylenically and acetylenically unsaturated monomers. The invention includes a polymerization process of combining or contacting olefinically unsaturated monomers with the invention catalyst composition. Use of the invention catalyst to polymerize &agr;-olefins is exemplified.

Abstract: The invention relates to high-activity catalysts for olefin polymerization, to efficient methods for producing them, and to efficient methods of using the catalysts for producing high-quality polyolefins. The olefin polymerization with the catalysts does not require a large amount of an organic aluminium compound, and the residual metal in the polyolefins produced is much reduced. The catalysts are characterized by containing a product as prepared by contacting any of clay, a clay mineral and an ion-exchanging layered compound, an organic silane compound, and water with each other, or by containing a silane compound-processed clay.

Abstract: A solid self-supported cycloalkadienyl catalyst component is disclosed that includes: (i) a mixed metal alkoxide complex which is the reaction product of a magnesium alkoxide or aryloxide and at least one group IVB metal-containing alkoxide or aryloxide; and (ii) Cp, where Cp is a cyclic or polycyclic hydrocarbon having from 3-30 carbon atoms. A self-supported hybrid catalyst also is disclosed which contains the above components (i) and (ii), as well as (iii) a Ziegler-Natta catalyst species. A method of making the self-supported cycloalkadienyl catalyst and the self-supported hybrid catalyst and a method of polymerizing olefins using the catalysts also are disclosed. The catalysts are capable of producing polyolefins in high yield having a broad molecular weight distribution, or a bimodal distribution.

Abstract: 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 polymerizing at least one monomer to produce a polymer, wherein said catalyst composition comprises a post-contacted organometal compound, a post-contacted organoaluminum compound, and a post-contacted treated solid oxide compound. The post-contacted treated solid oxide compound has been treated with a vanadium compound, calcied, then treated with a halogen-containing compound.

Abstract: The present invention relates to spherical solid catalyst components for the polymerization of olefins, comprising a titanium compound, supported on a magnesium halide, containing more than one Ti-halogen link and optionally containing groups different from halogen in an amount lower than 0.5 mole per mole of Ti. Spherical solid compounds of the invention are characterized by having a surface area, measured by the BET method, of lower than 70 m2/g, a total porosity, measured by the mercurium method, higher than 0.5 cm3/g and a pore radius such that at least 50% have values higher than 800 Å.