Ziegler-Natta catalysts for the production of polyethylene

    公开(公告)号:US11542344B2

    公开(公告)日:2023-01-03

    申请号:US17057766

    申请日:2019-05-29

    摘要: The heterogeneous procatalyst of this disclosure includes a titanium species; a hydrocarbon soluble transition metal compound having a structure M(OR1)z; a chlorinating agent having a structure A(Cl)x(R2)3-x, and a magnesium chloride component. M of M(OR1)z is a non-reducing transition metal other than titanium, the non-reducing transition metal being in an oxidation state of +2 or +3. Each R1 is independently (C1-C30)hydrocarbyl or —C(O)R11, where R11 is (C1-C30)hydrocarbyl. Subscript z of M(OR1)z is 2 or 3. Each R1 and R11 may be optionally substituted with one or more than one halogen atoms, or one or more than one —Si(RS)3, where each RS is (C1-C30)hydrocarbyl. A of A(Cl)x(R2)3-x is aluminum or boron; R2 is (C1-C30)hydrocarbyl; and x is 1, 2, or 3; and a magnesium chloride component.

    POLYMERIZATION CATALYSTS FOR PRODUCTION OF POLYETHYLENE WITH HIGH MOLECULAR WEIGHT

    公开(公告)号:US20220389137A1

    公开(公告)日:2022-12-08

    申请号:US17630798

    申请日:2020-07-30

    IPC分类号: C08F210/16

    摘要: The catalyst system includes a heterogeneous procatalyst, an electron donor, and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula Cp2TiXnTiCp2 or Cp2TiXn. In formula Cp2TiXn, each Cp is a cyclopentadienyl substituted with at least one R1, wherein R1 is (C1-C10)alkyl; and 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.