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  • US Patent for Catalyst component for olefin polymerization ...

    Disclosed is a catalyst component for olefin polymerization. The catalyst component comprises magnesium, titanium, halogen and an internal electron donor. The internal electron donor includes an imine compound with a ketone group as shown in Formula I. Disclosed further is a method of preparing the catalyst component, and a catalyst for olefin polymerization containing the catalyst component.

  • olefin Description, Characteristics, Types Britannica

    May 22, 2020  Olefin, compound made up of hydrogen and carbon that contains one or more pairs of carbon atoms linked by a double bond. Olefins are important commercial petrochemicals and are produced through various methods, including fluid catalytic

  • Petroleum refining - Polymerization and alkylation ...

    Polymerization and alkylation. The light gaseous hydrocarbons produced by catalytic cracking are highly unsaturated and are usually converted into high-octane gasoline components in polymerization or alkylation processes. In polymerization, the light olefins propylene and butylene are induced to combine, or polymerize, into molecules of two or three times their original molecular weight.

  • Synthesis, characterization, and olefin (co)polymerization ...

    As a result, α-olefin polymerization in this system can generate thermoplastic elastomers with good elastomeric recovery and high strain at break. The current palladium catalytic system may provide a rare route to the synthesis of thermoplastic elastomers in one step using only α-olefin

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  • US Patent for Catalyst component for olefin polymerization ...

    A catalyst component (A) for olefin polymerization is prepared by contacting a solid component (a) containing magnesium, titanium, halogen and an internal electron donor compound with an organosilicon compound (b), wherein the organosilicon compound (b) is one or more selected from a Si—H functional group containing chainlike polysiloxane (b1) represented by formula (Ix), a cyclic ...

  • Catalyst System for Olefin Polymerization and Method for ...

    Feb 19, 2016  A phthalate-free catalyst component for olefin polymerization comprising titanium, magnesium, a halogen, diether, and oxalic acid diamides represented by the following formula (I): and an olefin polymerization catalyst system consisting of the solid catalyst component, an organoaluminum compound, and an optional external electron donor compound.

  • Bridged metallocene compound, olefin polymerization ...

    The olefin polymerization catalysts of the invention may be prepared as described below. In a first embodiment, the olefin polymerization catalysts of the invention may be prepared by adding the components (A), (B) and (C) to an inert hydrocarbon or a polymerization system containing an

  • Recent developments in vanadium-catalyzed olefin ...

    The Cossee–Arlman mechanism is generally accepted in coordination metal-promoted ethylene polymerization, in which an olefin monomer is inserted in a concerted manner into a metal-polymer chain bond via a four-center transition state in Fig. 1.At its initiation stage, the activation occurs with the formation of a metal–carbon sigma bond, the olefin coordinates with the metal active species ...

  • US Patent for Olefin polymerization catalyst compositions ...

    A highly active and stereoselective olefin polymerization catalyst component is obtained by halogenating a magnesium compound of the formula MgR'R" wherein R' is an alkoxide or aryloxide group and R" is an alkoxide or aryloxide group or halogen, with a halide of tetravalent titanium in the presence of a halohydrocarbon, and contacting the halogenated product with an acid halide and a ...

  • The catalyst for the (co)polymerization of olefin (co ...

    (57) Abstract: The invention relates to catalysts for (co)polymerization of olefins and method polymerizatio olefins. The catalyst for the (co)polymerization of olefins comprises the following components: option 1 - A - compound of a transition metal belonging to group IV In the periodic table of elements; alumoxane obtained previously from trialkylamine and water; - water.

  • Cyclo-Olefin Copolymer - an overview ScienceDirect Topics

    6.5.1 Cyclo Olefin Copolymer Manufacture. Cyclo olefin copolymers are manufactured by the copolymerization of a cyclic olefin (e.g., cyclopentene, norbornene) with an olefin like ethylene or propylene. The reaction of polymerizing a cyclo olefin resulting in a polymer is known as ring opening polymerization (ROMP).

  • Alkene - Wikipedia

    Polymerization of alkenes is a reaction that yields polymers of high industrial value at great economy, such as the plastics polyethylene and polypropylene.Polymers from alkene monomers are referred to in a general way as polyolefins or in rare instances as polyalkenes.A polymer from alpha-olefins is called a polyalphaolefin (PAO). Polymerization can proceed via either a free-radical or an ...

  • Polymers Special Issue : Olefin Polymerization and ...

    The development of new olefin polymerization catalysts has been a major driving force in this field. Despite decades of research, there are still a lot of unsolved issues. ... However, ternary components system, complex/MAO/[Ph 3 C][B(C 6 F 5) 4] resulted in low molecular weight polyisoprene (M n < 2000) with high trans-1,4-unit (>95%). Full ...

  • PROCESS FOR PRODUCING SOLID CATALYST COMPONENT FOR OLEFIN

    The present invention relates to a process for producing a solid catalyst component (A) for olefin polymerization, the process comprising the steps of: (1) bringing a silicon compound (a) having a Si ??O bond and an organomagnesium compound (b) into contact with one another to form a solid catalyst component precursor for olefin polymerization; and (2) bringing the solid catalyst component ...

  • Cyclo-Olefin Copolymer - an overview ScienceDirect Topics

    6.5.1 Cyclo Olefin Copolymer Manufacture. Cyclo olefin copolymers are manufactured by the copolymerization of a cyclic olefin (e.g., cyclopentene, norbornene) with an olefin like ethylene or propylene. The reaction of polymerizing a cyclo olefin resulting in a polymer is known as ring opening polymerization (ROMP).

  • Alkene - Wikipedia

    Polymerization of alkenes is a reaction that yields polymers of high industrial value at great economy, such as the plastics polyethylene and polypropylene.Polymers from alkene monomers are referred to in a general way as polyolefins or in rare instances as polyalkenes.A polymer from alpha-olefins is called a polyalphaolefin (PAO). Polymerization can proceed via either a free-radical or an ...

  • Polymers Special Issue : Olefin Polymerization and ...

    The development of new olefin polymerization catalysts has been a major driving force in this field. Despite decades of research, there are still a lot of unsolved issues. ... However, ternary components system, complex/MAO/[Ph 3 C][B(C 6 F 5) 4] resulted in low molecular weight polyisoprene (M n < 2000) with high trans-1,4-unit (>95%). Full ...

  • PROCESS FOR PRODUCING SOLID CATALYST COMPONENT FOR OLEFIN

    The present invention relates to a process for producing a solid catalyst component (A) for olefin polymerization, the process comprising the steps of: (1) bringing a silicon compound (a) having a Si ??O bond and an organomagnesium compound (b) into contact with one another to form a solid catalyst component precursor for olefin polymerization; and (2) bringing the solid catalyst component ...

  • Solid Catalyst Component For Olefin Polymerization ...

    In this case, the preliminary polymerization of an olefin is carried out in the presence of a catalyst that is a mixture of predetermined amounts of one of the solid catalyst components [A1] to [A4], the organic aluminum compound [B] and optionally the electron-donating compound [C] generally in the temperature range of 1 to 100° C. under a ...

  • Self-Stabilized Precipitation Polymerization and Its ...

    The polymerization is (a) a one-step precipitation polymerization producing functional copolymers of single olefinic compounds from the C4, C5, and C9 fractions; (b) a one-step precipitation polymerization for the preparation of functional copolymers using the C4, C5, or C9 fractions without separation; and (c) a route for the formation of NPs ...

  • NMR chemical shift analysis decodes olefin oligo- and ...

    Olefin polymerization. This subsection focuses on Zr-based olefin polymerization catalysts. The CST of analogous Ti and Hf com-pounds follows a similar trend, with the Ti compounds having the most deshielded values (SI Appendix,Figs.S1andS2). The devel-opment of the CST during ethylene polymerization is summarized in Fig. 4A.

  • Living alkene polymerization: New methods for the ...

    1. Introduction. The development of methods for the polymerization of a wide range of alkene monomers with control over the molecular weight and stereochemistry is a topic of fundamental importance to the field of polymer synthesis. A primary goal of synthetic polymer chemistry over the last half century is the development of chain-growth polymerization methods that enable consecutive ...

  • FI Catalyst for Polymerization of Olefin

    Polymerization olefin catalyst components has been depicted in Figure 8 including a metal, ligand(s), a growing polymer chain, a coordinated olefin, and a cocatalyst [40-42] . As can bee seen in Figure 8, FI catalysts are heteroatom [O-, N] coordinated early transition

  • Polymerization - an overview ScienceDirect Topics

    Polymerization processes are processes by which olefin gases are converted into liquid products that may be suitable for gasoline (polymer gasoline) or other liquid fuels. The feedstock usually consists of propene and butene isomers from cracking processes or may even be selective olefins for dimer, trimer, or tetramer production.

  • Solid catalyst component for olefin polymerization and ...

    May 08, 2001  α-olefin polymerization catalyst and process for producing α-olefin polymer: 2000-10-17: Fujiwara et al. 502/125: 6034189: Solid titanium catalyst component for olefin polymerization, process for preparation of the same, olefin polymerization catalyst and process for olefin polymerization: 2000-03-07: Shinozaki et al. 502/127: 5684173

  • Olefin polymerization catalyst component - Shell Oil Company

    Dec 01, 1987  Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a magnesium compound of the formula [Mg 4 (OR) 6 (R'OH) 10]X where "X" is a counter ion having a total charge of -2 and R and R', which may be the same or different, are selected from alkyl groups of 1 to

  • CATALYST COMPONENT FOR OLEFIN POLYMERIZATION AND ...

    Oct 05, 2017  11. A pre-polymerization catalyst for an olefin CH 2 ═CHR polymerization, wherein R is hydrogen or a hydrocarbon group having 1 to 12 carbon atoms, comprising: a prepolymer obtained by pre-polymerization of the solid catalyst component according to claim 1 and the olefin. 12.

  • Catalyst component for olefin polymerization. - TOA NENRYO ...

    Apr 19, 1989  CATALYST COMPONENT FOR OLEFIN POLYMERIZATION. The present invention relates to a catalyst component for olefin polymerization. Some catalyst components for olefin polymerization using, as a raw material, a metal oxide such as silica, which are capable of producing polyolefins (e.g., polypropylene) having high stereo-regularity and excellent particle characteristics

  • Polymerization - an overview ScienceDirect Topics

    Polymerization processes are processes by which olefin gases are converted into liquid products that may be suitable for gasoline (polymer gasoline) or other liquid fuels. The feedstock usually consists of propene and butene isomers from cracking processes or may even be selective olefins for dimer, trimer, or tetramer production.

  • Solid catalyst component for olefin polymerization and ...

    May 08, 2001  α-olefin polymerization catalyst and process for producing α-olefin polymer: 2000-10-17: Fujiwara et al. 502/125: 6034189: Solid titanium catalyst component for olefin polymerization, process for preparation of the same, olefin polymerization catalyst and process for olefin polymerization: 2000-03-07: Shinozaki et al. 502/127: 5684173

  • Olefin polymerization catalyst component - Shell Oil Company

    Dec 01, 1987  Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a magnesium compound of the formula [Mg 4 (OR) 6 (R'OH) 10]X where "X" is a counter ion having a total charge of -2 and R and R', which may be the same or different, are selected from alkyl groups of 1 to

  • CATALYST COMPONENT FOR OLEFIN POLYMERIZATION AND ...

    Oct 05, 2017  11. A pre-polymerization catalyst for an olefin CH 2 ═CHR polymerization, wherein R is hydrogen or a hydrocarbon group having 1 to 12 carbon atoms, comprising: a prepolymer obtained by pre-polymerization of the solid catalyst component according to claim 1 and the olefin. 12.

  • Catalyst component for olefin polymerization. - TOA NENRYO ...

    Apr 19, 1989  CATALYST COMPONENT FOR OLEFIN POLYMERIZATION. The present invention relates to a catalyst component for olefin polymerization. Some catalyst components for olefin polymerization using, as a raw material, a metal oxide such as silica, which are capable of producing polyolefins (e.g., polypropylene) having high stereo-regularity and excellent particle characteristics

  • Olefin copolymerization with metallocene catalysts. III ...

    Yury Kissin, Chapter 4 Synthesis, Chemical Composition, and Structure of Transition Metal Components and Cocatalysts in Catalyst Systems for Alkene Polymerization, Alkene Polymerization Reactions with Transition Metal Catalysts, 10.1016/S0167-2991(07)00004-3, (207-290), (2007).

  • Heteroatom-assisted olefin polymerization by rare-earth ...

    Heteroatom-functionalized polyolefins are of fundamental interest and practical importance. This has spurred investigations of the copolymerization of polar and nonpolar olefins. We report the first syndiospecific polymerization of a series of heteroatom-containing α-olefins and their copolymerization with ethylene catalyzed by half-sandwich rare-earth complexes.

  • Polyolefin - Wikipedia

    An alpha-olefin (or α-olefin) is an alkene where the carbon-carbon double bond starts at the α-carbon atom, i.e. the double bond is between the #1 and #2 carbons in the molecule. Alpha-olefins such as 1-hexene may be used as co-monomers to give an alkyl branched polymer (see chemical structure below), although 1-decene is most commonly used ...

  • Catalytic Production of Olefin Block Copolymers via Chain ...

    We report a catalytic system that produces olefin block copolymers with alternating semicrystalline and amorphous segments, achieved by varying the ratio of α-olefin to ethylene in the two types of blocks. The system uses a chain shuttling agent to transfer growing chains between two distinct catalysts with different monomer selectivities in a single polymerization reactor.

  • THEORETICAL INVESTIGATION OF THE STRUCTURE AND

    1.2 Catalyst components Catalyst components in olefin polymerization are; metallocene, aluminum compounds and solvent systems. 1.2.1 Metallocenes Metallocenes (LL´MtX 2) are transition metals from group four of periodic table with d 0 electronic configuration. L, L´ represents the ° ligands while X 2 for two ³ ligands. Metallocenes

  • Olefin Polymerization - polymerdatabase

    The stereoselctivity in α-olefin polymerization depends on many factors. The most important factor is the stability of the chemisorbed catalytic complex. Its stability is affected by the ion radius of the metal atoms linked to the metalorganic compound, irregularities of the catalyst, and surface energy of

  • Single Site Olefin Polymerization Kinetics – Caruthers Group

    Home / Single Site Olefin Polymerization Kinetics . The polymerization of polyolefins is one of the key technologies in the modern chemical industry, where a variety of catalysts are used to accelerate the rate of polymerization and control the resulting stereochemistry. Of particular interest is the use of single site catalysts which involve a ...

  • Isospecific Polymerization of Olefins : With Heterogeneous ...

    ISBN: 9781461250845 1461250846 9781461295563 1461295564: OCLC Number: 840279913: Description: 1 online resource (439 pages) Contents: I Kinetics of Olefin Polymerization with Heterogeneous Ziegler-Natta Catalysts --I-1 Polymerization Kinetics: General Description --I-2 Phenomenological Kinetic Scheme of Olefin Polymerization --I-3 Molecular Weight Growth in the Beginning of a Polymerization ...

  • Olefin Polymerization Components - Phumlani Lodge

    An olefin polymerization catalyst component is ... The present inventors have intensively studied olefin polymerization catalyst components and a catalyst ... Get Price; Brevetto CA2251057A1 Olefin Olefin polymerization catalysts, olefin polymerization methods, and olefin polymer compositions and heat molded products CA 2251057 A1. Get Price