Patent ID: 7867939

Claim:
A catalyst for the polymerization of ethylene, consisting of component A and component B, wherein the component A is the main catalyst component and is prepared by contacting and reacting the following components: (1) a hydrocarbon solution of dialkylmagnesium compound, wherein the dialkylmagnesium compound is represented by a formula of RMgR′.yEt 3 Al, wherein R and R′ are identical or different, and are alkyl group having from 4 to 8 carbon atoms, y represents the molar ratio of Et 3 Al to RMgR′ and has a value of from 0.125 to 0.5; (2) an alcohol compound of formula R 1 OH, wherein R 1 is an alkyl group having from 2 to 10 carbon atoms; (3) a silica support thermally activated at a temperature of from 200 to 800° C.; (4) an alkylaluminum compound of formula R 2 n AlCl 3-n , wherein R 2 is an alkyl having from 1 to 14 carbon atoms, and n is a number of from 1 to 3; (5) a linear halogenated alkane of formula R 3 X, wherein R 3 is a linear alkyl group having from 3 to 12 carbon atoms, and X is halogen; and (6) a titanium compound of formula Ti(OR 4 ) m Cl 4-m , wherein R 4 is an alkyl group having from 1 to 10 carbon atoms, and m is a number of from 0 to 4; and wherein the component B is co-catalyst, and is an organoaluminum compound.