Preparation Method Of Catalyst For Ethylene Polymerization
Disclosed is a method for preparing a titanium solid catalyst supported on magnesium dichloride that may be used to prepare ultra-high molecular weight polyethylene having a high apparent density. Performing a polymerization reaction using a solid catalyst containing titanium tetrachloride and a phthalate compound may allow ultra-high molecular weight polyethylene having uniform particle size and high apparent density to be prepared.
1 . A preparation method of a catalyst for producing ultra-high molecular weight polyethylene, the method comprising:
(1) reacting magnesium dichloride (MgCl 2 ) with alcohol to prepare a magnesium compound solution;
(2) reacting titanium tetrachloride with the magnesium compound solution prepared in the step (1) to prepare a precursor; and
(3) reacting the precursor with titanium tetrachloride and phthalate compound to prepare the catalyst.
2 . The method of claim 1 , wherein the alcohol is an alcohol having 4 to 20 carbon atoms.
3 . The method of claim 1 , wherein the phthalate compound includes at least one phthalate compound represented by a following general formula (I)
R 1 OOC(C 6 H 4 )COOR 2 (I)
where each of R 1 and R 2 represents an alkyl group of 1 to 10 carbon atoms.