Preparation method of catalyst for polyolefin polymerization and preparation method of polyolefin

摘要

A preparation method of a catalyst for polyolefin polymerization capable of polymerizing low-density polyethylene in a single reactor without separately injecting a comonomer to thereby prepare a final product with a low cost through a more simplified process, a catalyst obtained by the preparation method, and a preparation method of a polyolefin using the catalyst are provided.

主权项

1. A preparation method of a catalyst for polyolefin polymerization, the preparation method comprising:
supporting an organic chromium compound of the following Chemical Formula 1 on a support including one or more selected from a group consisting of silicia, silica-alumina, and silica-magnesia; supporting a cocatalyst containing a Group 13 metal on the support on which the organic chromium compound is supported; and supporting a metallocene catalyst on the support on which the organic chromium compound and the cocatalyst are supported: in Chemical Formula 1, R1 and R2 are the same or different and are each independently a hydrocarbyl group having 2 to 20 carbon atoms, containing a heteroatom selected from a group consisting of O, N, and P, R3 is hydrogen or a hydrocarbyl group having 2 to 20 carbon atoms, containing a heteroatom selected from a group consisting of O, N, and P, and Y is a halogen, hydrogen, or a hydrocarbyl group having 1 to 4 carbon atoms.