PRODUCTION METHOD FOR A SPHERICAL CARRIER FOR AN OLEFIN POLYMERIZATION CATALYST, AND A SOLID CATALYST USING THE SAME AND PROPYLENE POLYMERS
The provided are a method for preparing a spherical support for a catalyst for olefin polymerization and a solid catalyst prepared using the support, and a propylene polymer obtained by using the solid catalyst. Specifically, a method for preparing a spherical support which can be used for preparation of a propylene polymerization catalyst, particularly a dialkoxy magnesium support, comprising reacting metal magnesium and an alcohol in the presence of a halogenated nitrogen compound as a reaction initiator and adjusting the initial reaction temperature to the range of 20-25° C. and the aging temperature to the range of 55-65° C.; a solid catalyst for olefin polymerization prepared by using the above-obtained support; and a propylene polymer having a high bulk density prepared by using the above-obtained catalyst are provided.
1 . A method for preparing a spherical support for a catalyst for olefin polymerization comprising the reaction of metal magnesium and an alcohol, wherein the method comprises reacting the metal magnesium with an alcohol at the initial reaction temperature of 20-25° C., and then aging the resultant from the reaction at the temperature of 55-65° C.
2 . The method according to claim 1 , wherein the reaction of metal magnesium and an alcohol is carried out in the presence of a halogenated nitrogen compound as a reaction initiator.
3 . The method according to claim 2 , wherein the halogenated nitrogen compound is N-bromosuccinimide.
4 . A catalyst for olefin polymerization prepared by reacting the support prepared by the method according to claim 1 with titanium halide and a diester compound as an internal electron donor, in the presence of an organic solvent.
5 . A propylene polymer prepared from propylene polymerization carried out by using the catalyst according to claim 4 , alkyl aluminum as a cocatalyst and an alkoxysilane compound as an external electron donor.
6 . The propylene polymer according to claim 5 which has a bulk density of 0.46 g/cc or more.