WO2001012684A1 - Procede de polymerisation - Google Patents

Procede de polymerisation Download PDF

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Publication number
WO2001012684A1
WO2001012684A1 PCT/GB2000/002806 GB0002806W WO0112684A1 WO 2001012684 A1 WO2001012684 A1 WO 2001012684A1 GB 0002806 W GB0002806 W GB 0002806W WO 0112684 A1 WO0112684 A1 WO 0112684A1
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Prior art keywords
hydrocarbyl
heterohydrocarbyl
polymerisation
process according
substituted
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PCT/GB2000/002806
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English (en)
Inventor
Marc John Payne
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Bp Chemicals Limited
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Priority to AU60050/00A priority Critical patent/AU6005000A/en
Publication of WO2001012684A1 publication Critical patent/WO2001012684A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F110/02—Ethene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Definitions

  • the present invention relates to a process for the polymerisation and copolymerisation of 1-olef ⁇ ns, specifically to such processes utilising polymerisation catalysts based on certain transition metal complexes.
  • Such processes can be operated by polymerising the monomers in the gas phase, or in solution or in suspension in a liquid hydrocarbon diluent.
  • Polymerisation of the monomers can be carried out in the gas phase (the "gas phase process"), for example by fluidising under polymerisation conditions a bed comprising the target polyolefin powder and particles of the desired catalyst using a fluidising gas stream comprising the gaseous monomer.
  • gas phase process a bed comprising the target polyolefin powder and particles of the desired catalyst using a fluidising gas stream comprising the gaseous monomer.
  • 1-olefins may be polymerised by contacting it with certain transition metal, particularly iron, complexes of selected 2,6- pyridinecarboxaldehydebis(imines) and 2,6-diacylpyridinebis(imines).
  • Gas phase polymerisations using an ethylene partial pressure of 8 bar are exemplified. It is an object of the present invention to provide an improved gas phase polymerisation process using such catalysts
  • the present invention provides a process for the polymerisation and copolymerisation of 1-olefins, comprising contacting the monomeric olefin under polymerisation conditions in the gas phase with a polymerisation catalyst comprising a complex of the formula
  • Y 1 and Y 2 are each independently S, O or N-R; Z is N or P; A 1 to A 3 are each independently N, P or C-R 8 ; and each R, each R 8 and R 4 and R 6 are all independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; M is Fe, Co, Ru or ; X represents an atom or group covalently or ionically bonded to the metal M; T is the oxidation state of the metal; and b is the valency of the atom or group X; wherein the partial pressure of the 1 -olefin under the polymerisation conditions is from 11 to 20 bar.
  • a preferred range of pressures is from 12 to 18 bar, and more preferably from 14 to 16 bar.
  • a preferred process comprises the steps of : a) preparing a prepolymer-based catalyst by contacting one or more 1-olef ⁇ ns with a catalyst, and b) contacting the prepolymer-based catalyst with one or more 1-olef ⁇ ns, wherein the catalyst is as defined above.
  • catalyst is intended to include “prepolymer- based catalyst” as defined above.
  • Preferred catalysts for use in the present invention comprise a complex having the formula
  • R 1 to R 7 are each independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl, substituted heterohydrocarbyl or SiR' 3 where each R' is independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl, substituted heterohydrocarbyl.
  • R 5 and R 7 are preferably independently selected from substituted or unsubstituted alicyclic, heterocyclic or aromatic groups, for example, phenyl, 1-naphthyl, 2-naphthyl, 2-methylphenyl, 2-ethylphenyl, 2,6-diisopropylphenyl, 2,3-diisopropylphenyl, 2,4-diisopropylphenyl, 2,6-di-n-butylphenyl, 2,6-dimethylphenyl, 2,3-dimethylphenyl, 2,4-dimethylphenyl, 2-t-butylphenyl, 2,6-diphenylphenyl, 2,4,6-trimethylphenyl, 2,6- trifluoromethylphenyl, 4-bromo-2,6-dimethylphenyl, 3,5 dichloro2,6-diethylphenyl, and 2,6,bis(2,6-dimethylphenyl)phenyl, cycl
  • R 19 to R 28 are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; when any two or more of R 1 to R 4 , R 6 and R 19 to R 28 are hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl, said two or more can be linked to form one or more cyclic substituents.
  • the ring systems P and Q are preferably independently 2,6-hydrocarbylphenyl or fused-ring polyaromatic, for example, 1 -naphthyl, 2-naphthyl, 1-phenanthrenyl and 8- quinolinyl.
  • at least one of R 19 , R 20 , R 21 and R 22 is hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl. More preferably at least one of R 19 and R 20 , and at least one of R 21 and R 22 , is hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl.
  • R 19 , R 20 , R 21 and R 22 are all independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl.
  • R 19 , R 20 , R 21 and R 22 are preferably independently selected from methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert.- butyl, n-pentyl, neopentyl, n-hexyl, 4-methylpentyl, n-octyl, phenyl and benzyl.
  • R ⁇ R 2 , R 3 , R 4 , R 6 , R 19 , R 20 , R 21 , R 22 , R 23 , R 25 , R 26 and R 28 are preferably independently selected from hydrogen and Ci to C 8 hydrocarbyl, for example, methyl, ethyl, n-propyl, n-butyl, t-butyl, n-hexyl, n-octyl, phenyl and benzyl.
  • R 5 is a group having the formula -NR 29 R 30 and R 7 is a group having the formula -NR 31 R 32 , wherein R 29 to R 32 are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; when any two or more of R 1 to R 4 , R 6 and R 29 to R 32 are hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl, said two or more can be linked to form one or more cyclic substituents.
  • Each of the atoms Y ⁇ Y 2 and Z (preferably nitrogen atoms) is coordinated to the metal by a "dative" bond, i.e.
  • the atom or group represented by X in the compounds of Formula (I) and (II) can be, for example, selected from halide, sulphate, nitrate, thiolate, thiocarboxylate, BF 4 " , PF ⁇ " , hydride, hydrocarbyloxide, carboxylate, hydrocarbyl, substituted hydrocarbyl and heterohydrocarbyl, or ⁇ -diketonates.
  • Examples of such atoms or groups are chloride, bromide, methyl, ethyl, propyl, butyl, octyl, decyl, phenyl, benzyl, methoxide, ethoxide, isopropoxide, tosylate, triflate, formate, acetate, phenoxide and benzoate.
  • Preferred examples of the atom or group X in the compounds of Formula (I) are halide, for example, chloride, bromide; hydride; hydrocarbyloxide, for example, methoxide, ethoxide, isopropoxide, phenoxide; carboxylate, for example, formate, acetate, benzoate; hydrocarbyl, for example, methyl, ethyl, propyl, butyl, octyl, decyl, phenyl, benzyl; substituted hydrocarbyl; heterohydrocarbyl; tosylate; and triflate.
  • X is selected from halide, hydride and hydrocarbyl. Chloride is particularly preferred.
  • the catalysts utilised in the present invention can if desired comprise more than one of the above-mentioned compounds.
  • the catalysts can also include one or more other types of catalyst, such as those of the type used in conventional Ziegler-Natta catalyst systems, metallocene-based catalysts, monocyclopentadienyl- or constrained geometry based catalysts, or heat activated supported chromium oxide catalysts (e.g. Phillips-type catalyst).
  • preferred catalysts for use in the process of the present invention additionally comprise an activator compound.
  • the activator is suitably selected from organoaluminium compounds and hydrocarbylboron compounds.
  • Suitable organoaluminium compounds include compounds of the formula A1R 3 , where each R is independently Ci-C ⁇ alkyl or halo.
  • Examples include trimethylaluminium (TMA), triethylaluminium (TEA), tri-isobutylaluminium (TIBA), tri-n-octylaluminium, methylaluminium dichloride, ethylaluminium dichloride, dimethylaluminium chloride, diethylaluminium chloride, ethylaluminiumsesquichloride, methylaluminiumsesquichloride, and alumoxanes.
  • Alumoxanes are well known in the art as typically the oligomeric compounds which can be prepared by the controlled addition of water to an alkylaluminium compound, for example trimethylaluminium. Such compounds can be linear, cyclic or mixtures thereof.
  • alumoxanes are generally believed to be mixtures of linear and cyclic compounds.
  • the cyclic alumoxanes can be represented by the formula [R 16 AlO] s and the linear alumoxanes by the formula R 17 (R 18 AlO) s wherein s is a number from about 2 to 50, and wherein R 16 , R 17 , and R 18 represent hydrocarbyl groups, preferably Ci to C ⁇ alkyl groups, for example methyl, ethyl or butyl groups.
  • Alkylalumoxanes such as methylalumoxane (MAO) are preferred.
  • alkylalumoxanes and trialkylaluminium compounds are particularly preferred, such as MAO with TMA or TIBA.
  • alkylalumoxane as used in this specification includes alkylalumoxanes available commercially which may contain a proportion, typically about 10wt%, but optionally up to 50wt%, of the corresponding trialkylaluminium; for instance, commercial MAO usually contains approximately 10wt% trimethylaluminium (TMA), whilst commercial MMAO contains both TMA and TIBA.
  • TMA trimethylaluminium
  • alkylalumoxane quoted herein include such trialkylaluminium impurities, and accordingly quantities of trialkylaluminium compounds quoted herein are considered to comprise compounds of the formula A1R 3 additional to any A1R 3 compound incorporated within the alkylalumoxane when present.
  • hydrocarbylboron compounds examples include boroxines, trimethylboron, triethylboron, dimethylphenylammoniumtetra(phenyl)borate, trityltetra(phenyl)borate, triphenylboron, dimethylphenylammonium tetra(pentafluorophenyl)borate, sodium tetrakis[(bis-3,5-trifluoromethyl)phenyl]borate, H * (OEt 2 )[(bis-3,5- trifluoromethyl)phenyl]borate, trityltetra(pentafluorophenyl)borate and tris(pentafluorophenyl) boron.
  • the quantity of activating compound selected from organoaluminium compounds and hydrocarbylboron compounds to be employed is easily determined by simple testing, for example, by the preparation of small test samples which can be used to polymerise small quantities of the monomer(s) and thus to determine the activity of the produced catalyst. It is generally found that the quantity employed is sufficient to provide 0.1 to 20,000 atoms, preferably 1 to 2000 atoms of aluminium or boron per atom of metal M in the compound of Formula (I).
  • An alternative class of activators comprise salts of a cationic oxidising agent and a non-coordinating compatible anion.
  • cationic oxidising agents include: ferrocenium, hydrocarbyl-substituted ferrocenium, Ag + , or Pb 2+ .
  • non- coordinating compatible anions are BF ' , SbCl ⁇ ' , PF ⁇ " , tetrakis(phenyl)borate and tetrakis(pentafluorophenyl)borate.
  • the catalyst may also comprise a neutral Lewis base.
  • Neutral Lewis bases are well known in the art of Ziegler-Natta catalyst polymerisation technology.
  • classes of neutral Lewis bases suitable for the present invention are unsaturated hydrocarbons, for example, alkenes (other than 1 -olefins) or alkynes, primary, secondary and tertiary amines, amides, phosphoramides, phosphines, phosphites, ethers, thioethers, nitriles, carbonyl compounds, for example, esters, ketones, aldehydes, carbon monoxide and carbon dioxide, sulphoxides, sulphones and boroxines.
  • 1 -olefins are capable of acting as neutral Lewis bases, for the purposes of the present invention they are regarded as monomer or comonomer 1 -olefins and not as neutral Lewis bases per se.
  • alkenes which are internal olefins, for example, 2-butene and cyclohexene are regarded as neutral Lewis bases in the present invention.
  • Preferred monomers for homopolymerisation processes are ethylene and propylene.
  • Suitable other monomers copolymerisation with ethylene or propylene are, for example, C 2-20 ⁇ -olefins: specifically 1-butene, 1-pentene, 1-hexene, 4- methylpentene-1, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1- tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1- nonadecene, and 1-eicosene.
  • Other monomers include methyl methacrylate, methyl acrylate, butyl acrylate, acrylonitrile, vinyl acetate, and styrene.
  • polymerisation or copolymerisation is typically carried out under conditions that substantially exclude oxygen, water, and other materials that act as catalyst poisons. Also, polymerisation or copolymerisation can be carried out in the presence of additives to control polymer or copolymer molecular weights.
  • hydrogen gas as a means of controlling the average molecular weight of the polymer or copolymer applies generally to the polymerisation process of the present invention.
  • hydrogen can be used to reduce the average molecular weight of polymers or copolymers prepared using gas phase, slurry phase, bulk phase or solution phase polymerisation conditions.
  • the quantity of hydrogen gas to be employed to give the desired average molecular weight can be determined by simple "trial and error" polymerisation tests.
  • the polymerisation process of the present invention provides polymers and copolymers, especially ethylene polymers, at remarkably high productivity (based on the amount of polymer or copolymer produced per unit weight of complex employed in the catalyst system). This means that relatively very small quantities of transition metal complex are consumed in commercial processes using the process of the present invention. It also means that when the polymerisation process of the present invention is operated under polymer recovery conditions that do not employ a catalyst separation step, thus leaving the catalyst, or residues thereof, in the polymer (e.g. as occurs in most commercial slurry and gas phase polymerisation processes), the amount of transition metal complex in the produced polymer can be very small.
  • the gas phase polymerisation conditions of the invention are particularly useful for the production of high or low density grades of polyethylene, and polypropylene.
  • the polymerisation conditions can be batch, continuous or semi- continuous.
  • one or more reactors may be used, e.g. from two to five reactors in series. Different reaction conditions, such as different temperatures or hydrogen concentrations may be employed in the different reactors.
  • the catalyst is generally metered and transferred into the polymerisation zone in the form of a particulate solid either as a dry powder (e.g. with an inert gas) or as a slurry.
  • This solid can be, for example, a solid catalyst system formed from the one or more of complexes of the invention and an activator with or without other types of catalysts, or can be the solid catalyst alone with or without other types of catalysts.
  • the activator can be fed to the polymerisation zone, for example as a solution, separately from or together with the solid catalyst.
  • the catalyst system or the transition metal complex component of the catalyst system employed in the gas phase polymerisation is supported on one or more support materials. Most preferably the catalyst system is supported on the support material prior to its introduction into the polymerisation zone. Suitable support materials are, for example, silica, alumina, zirconia, talc, kieselguhr, or magnesia.
  • Impregnation of the support material can be carried out by conventional techniques, for example, by forming a solution or suspension of the catalyst components in a suitable diluent or solvent, and slurrying the support material therewith.
  • the support material thus impregnated with catalyst can then be separated from the diluent for example, by filtration or evaporation techniques.
  • any associated and absorbed hydrocarbons are substantially removed,- or degassed, from the polymer by, for example, pressure let-down or gas purging using fresh or recycled steam, nitrogen or light hydrocarbons (such as ethylene). Recovered gaseous or liquid hydrocarbons may be recycled to the polymerisation zone.
  • Such methods generally involve agitating (e.g. by stirring, vibrating or fluidising) a bed of catalyst, or a bed of the target polymer (i.e. polymer having the same or similar physical properties to that which it is desired to make in the polymerisation process) containing a catalyst, and feeding thereto a stream of monomer at least partially in the gaseous phase, under conditions such that at least part of the monomer polymerises in contact with the catalyst in the bed.
  • the bed is generally cooled by the addition of cool gas (e.g. recycled gaseous monomer) and/or volatile liquid (e.g.
  • the polymer produced in, and isolated from, gas phase processes forms directly a solid in the polymerisation zone and is free from, or substantially free from liquid.
  • any liquid is allowed to enter the polymerisation zone of a gas phase polymerisation process the quantity of liquid in the polymerisation zone is small in relation to the quantity of polymer present. This is in contrast to "solution phase” processes wherein the polymer is formed dissolved in a solvent, and "slurry phase” processes wherein the polymer forms as a suspension in a liquid diluent.
  • the gas phase process can be operated under batch, semi-batch, or so-called
  • continuous conditions It is preferred to operate under conditions such that monomer is continuously recycled to an agitated polymerisation zone containing polymerisation catalyst, make-up monomer being provided to replace polymerised monomer, and continuously or intermittently withdrawing produced polymer from the polymerisation zone at a rate comparable to the rate of formation of the polymer, fresh catalyst being added to the polymerisation zone to replace the catalyst withdrawn form the polymerisation zone with the produced polymer.
  • the process can be operated, for example, in a vertical cylindrical reactor equipped with a perforated distribution plate to support the bed and to distribute the incoming fluidising gas stream through the bed.
  • the fluidising gas circulating through the bed serves to remove the heat of polymerisation from the bed and to supply monomer for polymerisation in the bed.
  • the fluidising gas generally comprises the monomer(s) normally together with some inert gas (e.g. nitrogen or inert hydrocarbons such as methane, ethane, propane, butane, pentane or hexane) and optionally with hydrogen as molecular weight modifier.
  • the hot fluidising gas emerging from the top of the bed is led optionally through a velocity reduction zone (this can be a cylindrical portion of the reactor having a wider diameter) and, if desired, a cyclone and or filters to disentrain fine solid particles from the gas stream.
  • the hot gas is then led to a heat exchanger to remove at least part of the heat of polymerisation.
  • Catalyst is preferably fed continuously or at regular intervals to the bed.
  • the bed comprises fluidisable polymer which is preferably similar to the target polymer.
  • Polymer is produced continuously within the bed by the polymerisation of the monomer(s).
  • Preferably means are provided to discharge polymer from the bed continuously or at regular intervals to maintain the fluidised bed at the desired height.
  • the process is generally operated at temperatures for example, between 50 and 120 °C. The temperature of the bed is maintained below the sintering temperature of the fluidised polymer to avoid problems of agglomeration.
  • the heat evolved by the exothermic polymerisation reaction is normally removed from the polymerisation zone (i.e. the fluidised bed) by means of the fluidising gas stream as described above.
  • the hot reactor gas emerging from the top of the bed is led through one or more heat exchangers wherein the gas is cooled.
  • the cooled reactor gas, together with any make-up gas, is then recycled to the base of the bed.
  • the volatile liquid can condense out.
  • the volatile liquid is separated from the recycle gas and reintroduced separately into the bed.
  • the volatile liquid can be separated and sprayed into the bed.
  • the volatile liquid is recycled to the bed with the recycle gas.
  • the volatile liquid can be condensed from the fluidising gas stream emerging from the reactor and can be recycled to the bed with recycle gas, or can be separated from the recycle gas and then returned to the bed.
  • the catalyst, or one or more of the components employed to form the catalyst can, for example, be introduced into the polymerisation reaction zone in liquid form, for example, as a solution in an inert liquid diluent.
  • the transition metal component, or the activator component, or both of these components can be dissolved or slurried in a liquid diluent and fed to the polymerisation zone.
  • the liquid containing the component(s) is sprayed as fine droplets into the polymerisation zone.
  • the droplet diameter is preferably within the range 1 to 1000 microns.
  • EP-A-0593083 discloses a process for introducing a polymerisation catalyst into a gas phase polymerisation.
  • the methods disclosed in EP-A-0593083 can be suitably employed in the polymerisation process of the present invention if desired.
  • the catalyst can be contacted with water, alcohols, acetone, or other suitable catalyst deactivators a manner known to persons of skill in the art.
  • the slurry was heated for 1 hour at 80°C with periodic agitation before adding a slurry of 2,6-diacetylpyridinebis(2,4,6-trimethylanil)FeCl 2 (0.026 g) in dried toluene (10 ml). The mixture was heated at 80 °C for a further hour with periodic agitation. The now clear supernatant was decanted off and the silica/MAO Fe complex was dried in vacuo until all signs of fluidisation stopped to leave an orange/brown free flowing solid. Analysis of the catalyst gave a nominal composition of 0.12%w/w Fe and 5.8%w/w Al.
  • the reagents used in the polymerisation tests were: hydrogen Grade 6.0 (supplied by Air Products): ethylene Grade 3.5 (supplied by Air Products): dried pentane (supplied by Aldrich): and methylaluminium (2M in hexanes, supplied by Aldrich).
  • a 3 litre reactor was heated to 80°C before being pressured to 10 bar with nitrogen and vented to

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

La présente invention concerne un procédé de polymérisation ou de copolymérisation d'oléfines-1, consistant à mettre en contact une oléfine monomère, dans des conditions de polymérisation en phase gazeuse, avec un catalyseur de polymérisation contenant un complexe correspondant à la formule (I), et dans lequel la pression partielle de l'oléfine-1 dans les conditions de polymérisation est comprise entre 11 et 20 bar. Dans la formule, Y1 et Y2 représentent de manière indépendante S, O ou N-R ; Z représente N ou P ; A1 à A3 représentent chacun de manière indépendante N, P ou C-R8 ; et R, R?8, R4 et R6¿ sont tous sélectionnés de manière indépendante parmi un groupe hydrogène, halogène, hydrocarbyle, hydrocarbyle substitué, hétérohydrocarbyle ou hétérohydrocarbyle substitué ; M représente Fe, Co ou Ru ; X représente un atome ou un groupe lié au métal M de façon covalente ou ionique ; T représente l'état d'oxydation du métal ; et b est la valence de l'atome ou du groupe X. Par rapport à l'état de la technique, l'invention présente une activité et un profil d'activité améliorés.
PCT/GB2000/002806 1999-08-02 2000-07-20 Procede de polymerisation WO2001012684A1 (fr)

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WO2002096919A1 (fr) * 2001-06-01 2002-12-05 Shanghai Institute Of Organic Chemistry, Chinese Academy Of Sciences Catalyseurs d'oligomerisation de l'ethylene, leur procede de preparation et leurs utilisations
US6545108B1 (en) 1999-02-22 2003-04-08 Eastman Chemical Company Catalysts containing N-pyrrolyl substituted nitrogen donors
US6559091B1 (en) 1999-02-22 2003-05-06 Eastman Chemical Company Catalysts containing N-pyrrolyl substituted nitrogen donors
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US6706891B2 (en) 2000-11-06 2004-03-16 Eastman Chemical Company Process for the preparation of ligands for olefin polymerization catalysts
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WO2014078919A1 (fr) 2012-11-26 2014-05-30 Braskem S.A. Catalyseur métallocène supporté sur support hybride, procédé d'obtention de celui-ci, procédé de polymérisation pour l 'obtention d'un homopolymère ou d'un copolymère d'éthylène à distribution de masse molaire large ou bimodale, utilisation du catalyseur de métallocène supporté et polymère d'éthylène à distribution de masse molaire large ou bimodale

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6545108B1 (en) 1999-02-22 2003-04-08 Eastman Chemical Company Catalysts containing N-pyrrolyl substituted nitrogen donors
US6559091B1 (en) 1999-02-22 2003-05-06 Eastman Chemical Company Catalysts containing N-pyrrolyl substituted nitrogen donors
US6825356B2 (en) 1999-02-22 2004-11-30 Eastman Chemical Company Catalysts containing N-pyrrolyl substituted nitrogen donors
US6579823B2 (en) 2000-02-18 2003-06-17 Eastman Chemical Company Catalysts containing per-ortho aryl substituted aryl or heteroaryl substituted nitrogen donors
US6605677B2 (en) 2000-02-18 2003-08-12 Eastman Chemical Company Olefin polymerization processes using supported catalysts
US6844446B2 (en) 2000-02-18 2005-01-18 Eastman Chemical Company Catalysts containing per-ortho aryl substituted aryl or heteroaryl substituted nitrogen donors
US6946532B2 (en) 2000-02-18 2005-09-20 Eastman Chemical Company Catalysts containing per-ortho aryl substituted aryl or heteroaryl substituted nitrogen donors
US7056996B2 (en) 2000-02-18 2006-06-06 E. I. Du Pont De Nemours And Company Productivity catalysts and microstructure control
US6706891B2 (en) 2000-11-06 2004-03-16 Eastman Chemical Company Process for the preparation of ligands for olefin polymerization catalysts
WO2002096919A1 (fr) * 2001-06-01 2002-12-05 Shanghai Institute Of Organic Chemistry, Chinese Academy Of Sciences Catalyseurs d'oligomerisation de l'ethylene, leur procede de preparation et leurs utilisations
WO2014078919A1 (fr) 2012-11-26 2014-05-30 Braskem S.A. Catalyseur métallocène supporté sur support hybride, procédé d'obtention de celui-ci, procédé de polymérisation pour l 'obtention d'un homopolymère ou d'un copolymère d'éthylène à distribution de masse molaire large ou bimodale, utilisation du catalyseur de métallocène supporté et polymère d'éthylène à distribution de masse molaire large ou bimodale

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