Patent ID: 7718565

Claim:
A method for preparing solid catalysts for ethylene polymerization and/or copolymerization, comprising the steps of: (i) reacting a silicon compound containing an alkoxy group with a magnesium compound solution obtained by reacting a magnesium compound with alcohol in the presence of hydrocarbon solvent to obtain a silicon-containing magnesium solution; (ii) adding the silicon-containing magnesium compound solution obtained from the step (i) in a titanium compound at a temperature ranging from −20° C. to 20° C.; and (iii) heating the resulting mixture obtained from the step (ii) slowly to a temperature ranging from 50° C. to 130° C. for 10 minutes to 5 hours and reacting the resulting mixture at the temperature ranging from 50° C. to 130° C. for 10 minutes to 5 hours to obtain a solid catalyst particle.