The olefin polymerization catalyst component provided by the invention can effectively delay the activity attenuation of the catalyst and can meet the requirement of multi-kettle series connection of industrial devices. CN116023546A - Olefin polymerization catalyst component, preparation method thereof, olefin polymerization catalyst and ...

The development of high-performance olefin polymerization catalysts is a major driving force in polyolefin studies. ... Younkin, T. R. et al. Neutral, single-component nickel(ii) polyolefin ...

The catalysts used in olefin polymerizations typically contain electrophilic, high-valent, unsaturated metal centres — these each coordinate to a monomer, which then undergoes insertion into a...

Olefin Polymerization with Ziegler-Natta Catalyst. The Ziegler-Natta (ZN) catalyst, named after two chemists: Karl Ziegler and Giulio Natta, is a powerful tool to …

Recently, binuclear catalysts based on an olefin polymerization catalyst part (typically a Ti based CGC complex) linked to an ethylene trimerization catalyst part (typically a SNS-Cr based complex) were successfully synthesized by Marks et al. ... ScH] 2: A unique example of a single-component α-olefin polymerization catalyst. Organometallics ...

The order of the components addition in olefin polymerization by metallocene/MAO systems has the great effects on polymer yield, molecular mass and molecular mass distribution. The theoretical consideration based on the charge percolation mechanism.

Polyolefins, the generic name for synthetic polymers based on ethylene, propylene, and α olefins, have become the world's most common synthetic polymers, with current annual capacity in excess of 70 billion kg. The tremendous volume and broad utility of polyolefins is related to the ability to make many different kinds of material, from ...

Since the seminal work of Ziegler and Natta and its contribution to olefin polymerization catalysis, the research on olefin polymerization has attracted much attention from a wide range of academic and industrial communities [1,2].Polyolefins, with an annual production of 180 million tons [3,4,5], are widely used in people's lives such as …

The invention discloses a method and a device for olefin polymerization, belonging to the technical field of olefin polymerization. The invention condenses and stores the different components in the storage tank by the gas-liquid separation device on the circulating pipeline. By controlling the valve switch on the pipeline between the storage tank and the …

In the early 1990s a new type of olefin polymerization catalyst was introduced. Catalyst derived from metallocenes give a polymer with a very narrow …

The conclusion may be drawn that the data obtained of comparative studies of olefin polymerization by the one-component catalyst (TiCln) and two-component systems (Tic& AlEt,Cl,) confirm the concept of "monometallic" active centers on the surface of titanium chlorides developed by Cossee and Arlman (170-1 73). + 4.

Catalyst systems, olefin polymerization catalyst components comprising at least an internal electron donor compound, and methods of making and using the same US9637575B2 (en) : : W. R. Grace & Co. -Conn. Catalyst system, olefin polymerization catalyst components comprising at least an internal electron …

Process for preparing an olefin polymerisation catalyst component in the form of particles having a predetermined size range, said process comprising the steps of a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said metal with said electron donor or a precursor thereof in an organic liquid reaction …

For example, patent document 1 describes a solid titanium catalyst component for olefin polymerization, which contains titanium, magnesium, a halogen and an electron donor, and i) has an average particle diameter d of 25 to 100 μm, and ii) has a particle strength N (MPa) satisfying the formula "N (MPa)>8000×d -2".The solid titanium catalyst component for …

Organolithium Catalysis of Polymerization 71 at 143.5 ppm, then tend to disappear as the DP increases. The strongest peak remaining, at 143.5 ppm, is due to the C-2 (nonterminal) olefinic carbon of the 1,2-microstructure. The three minor peaks shift to higher field as the sample is heated.

When the grain strength of a catalyst component is low, a polymer formed by polymerization is broken to give a fine powder. As a typical method for preventing this phenomenon, there is a so-called previous polymerization method comprising previously contacting the catalyst component with an olefin to take the thus formed polymer in the …

The polymerization mechanism for the formation of the quaternary carbon centers is proposed. ... In this paper, a single-component poly-α-olefin (PAO) oil base stock of an α-olefin tetramer was prepd. via two-step oligomerization using a metallocene catalyst and a Ziegler-Natta catalyst in sequence. The structure was characterized, the ...

Prepare magnesium-containing carrier, prepare catalyst solid component of olefin polymerization and carry out propylene polymerization according to the method for embodiment 15, difference is, in the process of preparing catalyst solid component of olefin polymerization, do not comprise in described solid product and add 100mL titanium ...

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 …

The order of the components addition in olefin polymerization by metallocene/MAO systems has the great effects on polymer yield, molecular mass and molecular mass distribution.

The present invention relates to a catalyst component for olefin polymerization and a preparation method thereof, an olefin polymerization method using the olefin polymerization catalyst, and a slurry preparation method. According to the present invention, an auxiliary dispersing agent is added during a catalyst component …

Beginning in the 1970s, so-called linear alpha olefins (LAOs; distinguished by the double bond occurring on the first, or alpha, carbon atom in the unbranched chain) were produced through polymerization (specifically, …

Scope of Olefin Polymerization Nickel Catalysts. In their report "Neutral single-component nickel (II) catalysts that tolerate heteroatoms" (21 Jan., p. 460 ), T. R. Younkin et al. describe the development of a family of polymerization catalysts that are tolerant of many functional groups and low-purity starting materials.

To optimize the performance of supported olefin polymerization catalysts, novel methodologies are required to evaluate the composition, structure, and morphology of both pristine and prepolymerized samples in a resource-efficient, high-throughput manner. Here, we report on a unique combination of laboratory-based confocal fluorescence …

[Problem] To provide a solid titanium catalyst component, an olefin polymerization catalyst and an olefin polymerization method, each enabling the production of an olefin polymer at a high activity, said olefin polymer being superior in stereoregularity and molecular weight distribution to conventional olefin polymers. To provide a propylene …

An olefin polymerization catalyst component comprising an internal electron donor compound shown in formula (I) below is provided in this disclosure: wherein X is O, S, NR a, PR b, or POOR c, R a is independently hydrogen, halogen, carbonyl hydrocarbon, linear or branched unsaturated or saturated alkyl hydrocarbon, cyclic, aromatic, or ...

This invention relates to a process for polymerizing olefins using a catalyst composed of a transition metal catalyst component,an aluminoxane component and an organoaluminum component. In the process of this invention, the catalyst exhibits excellent polymerization activity with the use of a small amount of the aluminoxane. The polymerization process …

A pre-polymerized catalyst component, for the polymerization of ethylene, optionally, in mixtures with olefins CH2 = CHR, wherein, R, is a C1-C12 alkyl group, characterized by the fact that it comprises a solid catalyst component, non-specific, comprising Ti, Mg and a halogen, which is prepolymerized with an alpha-olefin CH2 = …

Effect of Polymerization Components on Oxygen-Tolerant Photo-ATRP. ACS Macro Letters 2019, 8 ... Reaction of Vinyl Chloride with Group 4 Metal Olefin Polymerization Catalysts. Journal of the American Chemical Society 2003, ... The Oxidative Polymerization of Vinyl Monomers in the Presence of N ‐Hydroxyphthalimide.

discovered heterogeneous olefin polymerization catalysts. The linear chain structures of these homopolymers and copolymers resulted in differentiated properties …