Loading method of polyolefin catalyst

Abstract

The invention belongs to the field of a polyolefin catalyst. The method comprises the steps: dissolving or suspending a carrier in an organic solvent; adding compounds of organic lithium, organic sodium or organic potassium or a format reagent to the obtained carrier liquor or suspending liquor at the temperature of -40 DEG C to 30 DEG C; reacting for 0.5 to 3 hours at the temperature of -20 DEG C to 10 DEG C after the adding step; raising the temperature to 30 DEG C to 80 DEG C; reacting for 0.5 to 3 hours; obtaining a mixture; filtering the mixture for washing and removing residual organic lithium, organic sodium, organic potassium or the format reagent; reacting with titanium, metallocene, non-metallocene, vanadium, rare earth metal or chromic halide in the organic solvent at the temperature of -40 DEG C to 30 DEG C; reacting for 0.5 to 3 hours at the temperature of -30 DEG C to 0 DEG C after the adding step; raising the temperature to 20 DEG C to 100 DEG C; reacting for 1 to 5 hours; removing the residual halide by filtering and washing; drying; and obtaining a solid catalyst. The catalyst has the advantages of good grain shape, high loading quantity and high activity, does not fall off the carrier and is suitable for vapor phase polymerization technology, slurry polymerization technology or combination polymerization technology.

Description

technical field [0001] The invention belongs to the fields of olefin polymerization catalysts and olefin polymerization, and in particular relates to a catalyst loading method for homopolymerization or copolymerization of olefins. Background technique [0002] Olefin polymerization catalyst is the core of polyolefin polymerization technology. The catalytic efficiency of traditional Ziegler-Natta catalyst loaded on the carrier is significantly improved, which is called high-efficiency Ziegler-Natta catalyst, which makes the polyolefin industry develop rapidly. However, there are still problems such as small catalyst loading and low catalytic efficiency, especially the gas phase polymerization catalyst of ethylene, which is mainly based on SiO 2 As a carrier, the catalyst loading is low. Although metallocene catalysts and non-metallocene catalysts can efficiently catalyze olefin solution polymerization, there are still many engineering problems in industrial production, such...

AI Technical Summary

Problems solved by technology

However, there are still problems such as small catalyst loading and low catalytic efficiency, especially the gas phase polymerization catalyst of ethylene, which is mainly based on SiO 2 As a carrier, the catalyst loading is low

Although metallocene catalysts and non-metallocene catalysts can efficiently catalyze olefin solution polymerization, there are still many engineering problems in industrial production, such as pipeline blockage, poor polymer morphology, etc. The solution is to load metallocene catalysts and non-metallocene catalysts On the carrier, the main problem at present is that the loading capacity of the catalyst is small and the catalyst falls off from the carrier during the polymerization reaction.