34 results about "Ziegler–Natta catalyst" patented technology

The present application provides a kind of Ziegler-Natta catalyst for preparing high molecular weight polyethylene with narrow molecular weight distribution, porous polymer microspheres are used as carrier, load the Ziegler-Natta catalyst doped with trace metallocene, the doping amount of metallocene is 0.01-2wt% of the amount of Ziegler-Natta catalyst.The preparation method includes the reaction of porous polymer microspheres with alkyl magnesium chloride, then with aluminoxane compound, then the product is reacted with titanium tetrachloride, finally, add metallocene to the product to obtain Ziegler-Natta catalyst.The present application uses porous polymer microspheres as carrier, dopes trace metallocene in Ziegler-Natta catalyst, and the composite catalyst prepared is used for the synthesis of high molecular weight polyethylene, and high molecular weight polyethylene with narrow molecular weight distribution can be obtained, which can meet the application needs of lithium ion battery separator materials.

Processes of polymerizing olefin monomers and catalyst systems. The catalyst systems include a non-hydrogen-generating post-metallocene procatalyst; a co-catalyst; and a hydrogenation procatalyst having the formula Cp2TiXnTiCp2 or Cp2TiXn, in which each Cp is cyclopentadienyl substituted with at least one (C1-C10)alkyl; each X is independently monoanionic or neutral, wherein each X is independently (C1-C40)hydrocarbon, (C1-C40)heterohydrocarbon, (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, or a halogen atom; and n is 1 or 2.

This invention relates to a Ziegler-Natta catalyst for olefin polymerization and a method for producing polyolefins with excellent processability using the same. The Ziegler-Natta catalyst for olefin polymerization is characterized by its ability to produce polyolefins with excellent processability because it contains at least one external electron donor that satisfies a specific formula based on an alkoxysilane (silicate), thereby increasing the number of active sites of the titanium compound.