A method for producing an ethylene-based polymerization catalyst component, a method for producing an ethylene-based polymerization catalyst, and a method for producing an ethylene-based polymer.

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a catalyst component having good particle properties, which can stably produce an ethylene-based polymer having an ultra-high molecular weight component. A method for producing an ethylene-based polymerization catalyst component in which steps (1), (2), and (3) are sequentially performed. Step (1): The slurry of component A and component B is spray-dried and granulated to be granulated to obtain granulated particles. Step (2): The granulated particles are impregnated with a chromium compound in the presence of a solvent having a relative permittivity (ε0) of 50 or less at 25 ° C. to obtain a chromium compound-bearing component. Step (3): By removing the solvent in step (2), a fluid chromium compound-supporting component is obtained. Component A: Inorganic oxide having characteristics 1 and 2. (Characteristic 1) The ratio Py / Px of the peak intensity Py maximum in the range Y to the peak intensity Px maximum in the range X in the infrared absorption spectrum is less than 10. (Characteristic 2): Contains 90% by weight or more of SiO2. Component B: Fine particle inorganic oxide. [Selection diagram] Fig. 1