702 results about "Aluminoxane" patented technology

A process for carrying the non-metallocene catalyst by composite carrier includes such steps as thermally activating silica gel, reacting on the solution of magnesium chloride in tetrahydrofuran-alcohol solution to obtain composite carrier, reacting on chemical treating agent to obtain modified composite carrier and carrying non-metallocene catalyst by solution method or dipping method. Said catalyst can be used for the homopolymerization or copolymerization of C2-C10 olefin, styrene, or ethylene.

The invention relates to a new catalyst for single active central Ziegler-Natta alkene polymerization. Said catalyst takes salicylal containing dentate or substituted salicylal derivatives as electrons, and is prepared by adding pretreated carrier, metallic compound and electrons into magnesium compound / tetrahydrofuran solution. The catalyst can produce ethane homopolymer and copolymer with narrow molecular weight distribution (1.6-3.8) and even comonomer distribution, with high activity and under action of adjuvant catalyst of alkyl aluminium and alkyl aluminoxanes. The ethane polymerization, homopolymerization or combined polymerization of ethane and 1- olefin, ring olefin and polar monomer through slurry method or gas phase method by using said catalyst can be realized.

A process for the preparation of a catalyst system includes the steps of combining a support material with a first composition which includes at least one aluminoxane in a first solvent to provide an aluminoxane loaded support; and, contacting the aluminoxane loaded support with a second composition which includes at least one metallocene compound, a second solvent, and a cocatalyst, wherein the cocatalyst includes a second portion of the at least one aluminoxane alone or in combination with an ionic compound and / or a Lewis acid.

This invention relates to a method for producing functionalized cis-1,4-polydienes having a combination of a high cis-1,4-linkage content and a high functionality, the resulting polymers and the vulcanized products containing the polymers. The functionalized cis-1,4-polydienes of the present invention are produced by a method comprising the steps of: (1) preparing a reactive polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solvent, and resulting polymer, where the lanthanide-based catalyst is the combination of or reaction product of (a) a lanthanide compound, (b) an aluminoxane, (c) an organoaluminum compound other than an aluminoxane, and (d) a halogen-containing compound; and (2) contacting the reactive polymer with a functionalizing agent.

Conjugated diene polymers having good wear resistance, mechanical properties, storage stability, processability and a reduced cold flow are produced by polymerizing a conjugated diene compound with a catalyst of rare earth element compound, a compound containing at least one halogen atom, an aluminoxane, and an organoaluminum compound in an organic solvent and reacting the resulting polymer just after the polymerization with at least one compound selected from the group consisting of a halogenated organometallic compound, a halogenated metal compound, an organometallic compound, a heterocumulene compound, a hetero three-membered-ring containing compound, a halogenated isocyano compound, a carboxylic acid, an acid halide, an ester compound, a carbonic ester compound, an acid anhydride and a metal salt of a carboxylic acid as a modifying agent.

The present invention relates to catalyst composition for oligomerizing ethylene and its application. The catalyst composition includes complex of acetylacetone chromium, tetrahydrofuran chromium chloride and / or chromium isooctanate; ligand containing P and N; activator of methyl aluminoxane, ethyl aluminoxane, propyl aluminoxane and / or butyl aluminoxane; and promoter of X1R6X2, where, each of X1 and X2 is F, Cl, Br, I or alkoxyl, and R6 is alkyl or aryl group; with the molar ratio of the complex, the ligand, the activator and the promoter being 1 to 0.5-10 to 50-3000 to 0.5-10. The catalyst composition is used in oligomerizing reaction of ethylene to prepare 1-octene, and has high catalytic activity and high 1-octene selectivity.

Propylene isoblock polymers with 0.5 to 10 mol %, based on the total polymer, of randomly distributed ethylene content and with a narrow molecular weight distribution and rubber-like properties are obtained when propylene is polymerized using a catalyst comprising an aluminoxane and a chiral metallocene, containing bridges, of formula I: in which M1 is preferably hafnium or zirconium, R1 and R2 are preferably halogen (e.g. C1) atoms, R3 through R6 are hydrogen or C1-C10-alkyl, and pair of adjacent radicals R3, R4, R5, and R6 can form an aromatic ring with the C-atoms to which they are bonded, and R7 is preferably -Si(CH3)2-Si(CH3)2-.

A catalyst system comprising:(a) one or more bisarylimino pyridine iron or cobalt catalysts;(b) a first co-catalyst compound which is selected from aluminium alkyls, aluminoxanes, and mixtures thereof; and(c) a second co-catalyst compound which comprises one or more compounds of the formula ZnR′2 wherein each R′, which may be the same or different, is selected from hydrogen, optionally substituted C1–C20 hydrocarbyl, phenyl, Cl, Br, I, SR″, NR″2, OH, OR″, CN, NC wherein R″, which within the same molecule may the same or different, is C1–C20 hydrocarbyl.

The invention provides a supported metallocene catalyst, which comprises a carrier, and alkyl aluminoxane and a metallocene compound which are supported on the carrier, wherein the metallocene compound has a structure shown as a formula 1. The invention also provides a method for preparing the supported metallocene catalyst, a method for preparing an olefin polymer by using the catalyst, and the olefin polymer prepared by the method for preparing the olefin polymer. In the olefin polymerization process, the supported metallocene catalyst can reduce the using amount of the alkyl aluminoxane so as to reduce the preparation cost of the olefin polymer; the high molecular weight polyethylene prepared by using the catalyst has a good shape and high bulk density; and the catalyst can be applied to gas-phase polymerization and slurry polymerization processes. The formula 1 is shown as the specifications.

This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst system of the invention provides for a metallocene catalyst and alumoxane activator supported on a porous support using a total volume of catalyst solution that is less than that of which a slurry is formed. The metallocene and alumoxane aer mixed in solution, then the solution is added to a porous support in a volume between the total pore volume of the support and the volume at which a slurry forms. The solvent is then removed, leaving an activated supported metallocene.

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 produced by a process comprising the steps of: (a) forming a supported bimetallic catalyst system comprising a first catalyst component and a metallocene catalyst compound; and (b) contacting the supported bimetallic catalyst system of (a) with at least one methylalumoxane-activatable compound.

The invention discloses an olefin polymeric catalyst and preparing method and reacting technology, which is characterized by the following: the expression formula of catalyst is [SiO2-Cat], wherein Cat represents semi-sandwich homogeneous phase catalyst of transient element metallic titanium (IV) or zirconium (IV); SiO2 represents dielectric molecular sieve SBA-15 decorated by methyl alundum alkyl, which can synthesize polyethylene; the catalyst possesses high ethylene polymeric activity, which displays ultrahigh molecule with different patterns.

The invention discloses a loading non-metallocene single active central catalyst composition which is obtained through adopting an alkyl aluminoxane / magnesium chloride / silica gel carrier as a carrier and loading a non-metallocene single active central transition metal composition and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. The carrier is simple to prepare; the prepared loading catalyst granule has good shape and adjustable size; and the obtained polythene powdery material has high stacking density.

The invention relates to the field of catalytic polymerization of olefins, aiming at providing an ethylene acenaphthylene (alpha-diimine) nickel complex / alkyl aluminum chloride combined catalyst. The combined catalyst consists of an ethylene acenaphthylene (alpha-diimine) nickel complex and alkyl aluminum chloride, wherein the molar ratio of aluminum in alkyl aluminum chloride to nickel in the ethylene acenaphthylene (alpha-diimine) nickel complex is 20-800:1. Compared with the prior art, the combined catalyst provided by the invention has higher activity and better stability in catalyzing polymerization of ethylene and propene. According to the invention, alkyl aluminum chloride is used as a cocatalyst. Compared with that of using methylaluminoxane or modified methyl aluminoxane, cost is significantly reduced, and in addition, localization of alkyl aluminum chloride is realized, saving the need of importing.

This disclosure provides for olefin wax oligomer compositions, methods of producing olefin wax oligomer composition, and methods for oligomerizing olefin waxes. This disclosure encompasses metallocene-based olefin wax oligomerization catalyst systems, including those that include a metallocene and an aluminoxane, a metallocene and a solid oxide chemically-treated with an electron withdrawing anion, and a metallocene, a solid oxide chemically-treated with an electron withdrawing anion, and an organoaluminum compound. The olefin wax oligomers prepared with these catalyst systems can decreased needle penetrations, increased viscosity, and an increased drop melt, making them useful as an additive in candles, stone polishes, liquid polishes, and mold release formulations.

A process to produce a first catalyst composition is provided. The process comprises contacting at least one first organometal compound and at least one activator to produce the first catalyst composition. The activator is selected from the group consisting of aluminoxanes, fluoro-organo borates, and treated solid oxide components in combination with at least one organoaluminum compound. In another embodiment of this invention, a process to produce a second catalyst composition for producing bimodal polymers is provided. The process comprises contacting at least one first organometal compound, at least one activator, and at least one second organometal compound to produce the second catalyst composition. The first and second catalyst compositions are also provided as well as polymerization processes using these compositions to produce polymers.

The present invention relates to a new olefin polymerization catalyst composition, and methods of preparing and methods of using the catalysts to polymerize various olefinic monomers in either gas or slurry phase reactions. The principal advance over the previous art of record involves using alumoxanes or combinations of alumoxanes as catalyst preactivators. Polymers prepared from these catalysts posses productivity increased as high as 40 percent. At the same time, the bulk density remains relatively constant. Additionally, the total amount of cocatalyst species needed to effectively practice the invention is relatively low.

A new P—N—P ligand in which each phosphorus atom is bonded to two ortho-fluorine substituted phenyl groups is useful in ethylene oligomerizations. In combination with i) a source of chromium and ii) an activator such as methalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of hexenes and octenes. The hexenes and octenes produced with this ligand contain very low levels of internal olefins when produced under preferred reaction conditions.

The present invention relates to a catalyst composition for ethylene oligomerization and the use thereof. Such catalyst composition includes chromium compound, ligand containing P and N, activator and accelerator; wherein the chromium compound is selected from the group consisting of acetyl acetone chromium, THF-chromium chloride and / or Cr(2-ethylhecanoate)3; general formula of the ligand containing P and N is shown as: in which R1, R2, R3 and R4 are phenyl, benzyl, or naphthyl. R5 is isopropyl, butyl, cyclopropyl, cyclopentyl, cyclohexyl or fluorenyl; the activatior is methyl aluminoxane, ethyl aluminoxane, propyl aluminoxane and / or butyl aluminoxane; general formula of the accelerator is X1R6X2, in which X1 and X2 are F, Cl, Br, I or alkoxyl, R6 is alkyl or aryl; the molar ratio of a, b, c and d is 1:0.5˜10:50˜3000:0.5˜10. After mixing the four components mentioned previously under nitrogen atmosphere for 10 minutes, they are incorporated to the reactor, or these four components are incorporated directly into the reactor. Then ethylene is introduced for oligomerization. Such catalyst can be used in producing 1-octene through ethylene oligomerization. It is advantageous in high catalysing activity, high 1-octene selectivity, etc. The catalytic activity is more than 1.0×106 g product·mol−1 Cr ·h−1, the fraction of C8 linear α-olefin is more than 70% by mass.

A process for the preparation of a catalyst system includes the steps of combining a support material with a first composition which includes at least one aluminoxane in a first solvent to provide an aluminoxane loaded support; and, contacting the aluminoxane loaded support with a second composition which includes at least one metallocene compound, a second solvent, and a cocatalyst, wherein the cocatalyst includes a second portion of the at least one aluminoxane alone or in combination with an ionic compound and / or a Lewis acid.

The invention relates to an ethylene oligomerization catalyst composition and an application thereof. The composition comprises the following components: a component a contains chromium acetylacetonate, tetrahydrofuran chromium chloride and / or chromium 2-ethylhexanoate; in the formula of a component b, R1, R2, R3 and R4 are phenyl, benzyl or naphthyl; and R5 is isopropyl, butyl, cyclopropyl, cyclopentyl, cyclohexyl or fluorenyl; a component c contains methyl aluminoxane, ethyl aluminoxane, propyl aluminoxane and / or butyl aluminoxane; a component d has a formula X1R6X2, wherein X1 and X2 are F, Cl, Br, I or alkoxy, and R6 is alkyl or aryl; in the formula of a component e, R is a linking group and selected from alkyl and derivatives thereof as well as aryl and derivatives thereof; and the molar ratio is 1: (0.5-10): (50-3000): (0.5-10): (0.5-10). The catalyst has the catalytic activity being more than 5.0*10<6>g mol<-1>Cr.h<-1>, and the mass of 1-hexene and 1-octylene is more than 93%.

The invention discloses a loading metallocene catalyst composition which is obtained through adopting an alkyl aluminoxane / magnesium chloride / silica gel carrier as a carrier and loading a metallocene catalyst precursor, and a preparation method thereof. The catalyst system consisting of the catalyst composition catalyzes ethylene to polymerize or copolymerize and has high polymerization activity. Compared with a common loading metallocene catalyst with an alkyl aluminoxane / silica gel carrier, the activity can be doubled or more. The carrier is simple to prepare; the prepared loading catalyst granule has good shape and adjustable size; and the obtained polythene powdery material has high stacking density.

The present invention relates to a multinuclear metallocene catalyst for olefin polymerization and a process for olefin polymerization using the same, in which the multinuclear metallocene catalyst for olefin polymerization comprises, as a main catalyst, a transition metal compound that contains at least two metal atoms in the groups III to X of the periodic table as central metals and a ligand having a cyclopentadienyl structure bridging between the two metal atoms, and, as a cocatalyst, an aluminoxane compound, an organoaluminum compound or a bulky compound reactive to the transition metal compound to impart a catalytic activity to the transition metal compound.

The invention discloses a domino catalyzing system of a primary metallocene catalyst, which takes ethane as a sole monomer to prepare branched polyethylene, and the application thereof, which relates to vinyl copolymer. the catalyzing system is a compound catalyzing system consisting of the single primary metallocene catalyst and two different catalyst promoters, wherein, the primary catalyst is a metallocene catalyst with a structural formula of Cp<1>MR<1>R<2>R<3>, Cp<1>Cp<2>MR<1>R<2> or Cp<1>-D-Cp<2>MR<1>R<2>; alkyl aluminium acts as an oligomerization catalyst promoter; methylaluminoxane or triisobutyl aluminium or triethyl aluminum that is not used together with the oligomerization catalyst promoter acts as a copolymerization catalyst promoter; the mole ratio between the oligomerization catalyst promoter and the primary catalyst is 10-1000 to 1, and the mole ratio between the copolymerization catalyst promoter and the primary catalyst is 20-1000 to 1. The catalytic activity of the metallocene domino catalyzing system for preparing the branched polyethylene is 5 multiplied by 10<5> to 5 multiplied by 10<7>gPE / (molM per hour), the degree of branching is 10-200 / 1000C, the molecular weight of the branched polyethylene prepared under the effect of the catalyzing system ranges from 1 multiplied by 10<5> to 4 multiplied by 10<5> and the melting point is below 120 DEG C or even no melting point exists.

This invention relates to an activator composition comprising (i) an organoaluminum compounds; (ii) a carbocation compound of the formula R1 (X)n; wherein R1 is a hydrocarbyl; n is from 1 to the number of possible substitutions of the hydrocarbyl group and each X is a labile leaving group; and (iii) an aluminoxane. The activator composition may also contain a carrier support. This invention also provides a catalyst composition comprising the activator composition described above and a transition metal component. This invention also provides methods of polymerizing monomer comprising carrying out such polymerization in the presence of one or more catalyst composition according to this invention.

The present invention relates to a binuclear metallocene compound, its preparation method and its application in olefinic polymerization. Said invention provides its structure expression formula, said compound can be matched with cocatalyst alkyl aluminoxane, and used for olefinic polymerization. It possesses high polymerization reaction activity, and can obtain olefinic polymerization product with high molecular weight and wide molecular weight distribution.