Amplification Sedimentation Of Ethylene Slurry Polymerization Catalysts

This paper is established on the amplification research of MgCl₂-supported Ziegler-Natta catalyst. According to the similar amplifier principle, the catalyst underbrush preparation technology would be amplified. And to apply the novel catalyst gained from amplified technology in copolymerization of ethylene and 1-butylene with AlEt3 as cocatalyst. Based on traditional Ziegler-Natta catalyst, the internal donors(DPDMS)would be added in to manufacture high-efficiency MgCl₂-supported Ziegler-Natta catalyst, which purpose is to improve the hydrogen response sensitivity and copolymerization performance, on the premise of keeping traditional catalyst hyperactivity.This paper systematically discussed the effect of the magnesiumalkoxide proportion, electron donor types, election donor addition and the adding temperature of electron donor on the catalyst performance during the process of catalyst preparation, and confirms the technology conditions of catalyst manufacture. According to the result of catalyst underbrush, the technical conditions of amplification preparation would be ensured. In addition, from the aspects of catalyst composition and its polymerization performance, whether the catalyst amplification preparation technology is feasible, repeatable and stable would be examined.The GZ catalyst magnification research shows that catalyst amplification preparation has commendable stability. Through comparative study of amplification catalyst with the domestic and overseas advanced catalysts (R1, R2), indicates that the sensitivities to hydrogen of GZ amplification catalyst is higher than reference catalyst, copolymerizing performance is excellent, polymer have higher bulk density, fine powder and oligomer wax content of polymerization products are obviously lower than other two catalysts, and industrialized application prospect is preferable. The study of GZ catalyst amplification for the catalyst laboratory research leaning to industrialized production has extremely vital significance.