Synthesis of loaded metallocene catalyst

Abstract

THe synthesis of loaded metallocene catalyst includes the mixing of carrier and IVB transition metal halide in solvent and at normal pressure and subsequent direct reaction with ligand negative ion. The present invention completes the synthesis and carrying of metallocene catalyst in one single step. The metallocene catalyst is cooperated with cocatalyst and used in polymerization reaction of olefine in required activity.

Description

technical field [0001] The invention relates to a synthesis method of a metallocene catalyst, in particular to a synthesis method of a supported metallocene catalyst for olefin polymerization. Background technique [0002] Metallocene catalyst systems for polymerization are mainly divided into two categories: homogeneous type and supported type. Homogeneous metallocene catalytic systems have many problems such as poor polymer morphology and high cocatalyst dosage in industrial applications, so supported metallocene catalytic systems have become the main direction of research. At present, the most common preparation method is to prepare the metallocene catalyst first, and then react with the cocatalyst alkyl aluminoxane and silica gel to form the metallocene catalyst system. Among them, the metallocene catalyst is made of at least one cyclopentadiene or its derivatives as a ligand, which is reacted with a transition metal halide after negative ionization and purified. Its re...

AI Technical Summary

Problems solved by technology

The problem is that the loading process requires high temperature and high vacuum, which is not suitable for industrial production