Patent Number: 6,617,278

Title: Catalyst system for use in ethylene polymerization and copolymerization and process for preparing the same

Abstract: The present invention provides a catalyst system and processes for preparing the system for use in ethylene polymerization and copolymerization. The catalyst system is obtained by dissolving any electron-donor activator and optionally, a metal halide adjusting agent, into a solution of magnesium halide in a solvent system consisting essentially of organic epoxy compounds and organic phosphorous compounds to form a homogeneous solution. At least one coprecipitator and a titanium halide or its derivative is then mixed to form a solid component, followed by incorporating in combination with an organic aluminum component prior to use in polymerizations. The electron donor activator is an ether or alcohol, and the coprecipitator is an organic acid, anhydride, ether, or ketone.

Inventors: Jin; Maozhu (Beijing, CN), Sun; Yijing (Beijing, CN), Wang; Yi (Beijing, CN), Peng; Rengi (Beijing, CN), Zhu; Baolan (Beijing, CN), Ma; Zhaowen (Beijing, CN)

Assignee: China Petro-Chemical Corporation

International Classification: C08F 10/00 (20060101); B01J 031/00 (); B01J 037/00 (); C08F 004/02 (); C08F 004/60 ()

Expiration Date: 09/09/2020