Catalyst for homopolymerizing and copolymerizing propylene and its preparation and use

US8470941B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Jianjun Yi · Beijing, CN
• Baozuo Yin · Tianjin, CN
• Chunming Cui · Tianjin, CN
• Zhifei Li · 翁根苏木, CN
• Liang Cui · 安丰镇, CN
• Huashu Li · Renqiu City, CN
• Weihuan Huang · Beijing, CN
• Jianying Zhang · Beijing, CN
• Li-Sheng Wang · Azusa, US

Key dates

• Filing date: Dec 2, 2008
• Grant date: Jun 25, 2013
• Expiry date: Jan 25, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A catalyst for homopolymerizing and copolymerizing propylene and its preparation and use. The catalyst component includes titanium compound containing at least one Ti-halogen bond and at least two kinds of electron donor compounds A and B supported on MgCl2.nROH adduct, wherein the electron donor compound A is a compound of formula (I), the electron donor compound B is ester or ether compound; the molar ratio between compound A and compound B is 0.1-5; the molar ratio between the total amounts of the two kinds of electron donors and MgCl2.nROH is 0.01-1, based on the amount of MgCl2.nROH; and the molar ration between the titanium compound containing Ti-halogen bond and MgCl2.nROH is 1-200. The catalyst has high activity, high stereospecificity and good copolymerization performance. In addition, the morphology of the polymer obtained therefrom is good.