Method of preparation of spherical support for olefin polymerization catalyst
Provided is a method of preparation of a spherical support for an olefin polymerization catalyst. Specifically, provided is a method of preparation of a support which can be used in preparation of an olefin polymerization catalyst, wherein, MgX(I) (X=halogen atom) is prepared by reacting a reaction initiator, nitrogen halide, and magnesium metal, and then magnesium metal and alcohol are reacted in the presence of the MgX, thereby resulting a smooth-surfaced spherical dialkoxy magnesium support having a uniform particle size distribution.
1. A method of preparation of a spherical support for an olefin polymerization catalyst, comprising:
i) preparing MgX(I), where X is halogen atom, and (I) refers to an oxidation state number by reacting a halogenated nitrogen compound and magnesium metal at a same ratio in equivalent weight; and
ii) reacting magnesium metal and alcohol in the presence of the MgX obtained from the step i),
wherein the halogenated nitrogen compound is at least one selected from the group consisting of the following structures (1), (2), (3), and (4):
(1) N-halide succinimides
where X is a halogen atom, and R 1 , R 2 , R 3 and R 4 are independently hydrogen or C 1 -C 12 alkyl or C 6 -C 20 aryl,
(2) trihaloisocyanuric acids
where X is a halogen atom,
(3) N-halophthalimides
where X is a halogen atom, and R 1 , R 2 , R 3 or R 4 are independently hydrogen, or C 1 -C 12 alkyl or C 6 -C 20 aryl, and
(4) hydantoins
where X is a halogen atom, and R 1 and R 2 are independently hydrogen, or C 1 -C 12 alkyl or C 6 -C 20 aryl.
2. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the alcohol is at least one selected from the group consisting of aliphatic alcohols represented as a general formula of ROH where R is alkyl having C 1 -C 6 and aromatic alcohols.
3. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein, in the reaction of magnesium metal and alcohol, the magnesium metal and the alcohol are used in a ratio of magnesium metal by weight:alcohol by volume=1:5-1:50.
4. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the X in MgX is Cl, Br or I.
5. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the magnesium metal is a powder having a particle size of 10-300 μm.
6. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the magnesium metal is a powder having a particle size of 50-200 μm.
7. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the alcohol is at least one selected from the group consisting of methanol, ethanol, propanol and butanol.
8. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the alcohol is ethanol.
9. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein in the reaction of magnesium metal and alcohol, the magnesium metal and the alcohol are used in a ratio of magnesium metal by weight:alcohol by volume=1:7-1:20.
10. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the reacting the magnesium metal and the halogenated nitrogen compound is performed at a temperature of 25-110° C.
11. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the reacting the magnesium metal and the halogenated nitrogen compound is performed at a temperature of 25-75° C.
12. The method of preparation of a spherical support for an olefin polymerization catalyst according to claim 1 , wherein the reacting magnesium metal and alcohol in the presence of the MgX is performed at a temperature of 75-90° C.