KR920021585A - Method for preparing catalyst composition for ethylene polymerization and method for preparing ethylene homopolymer or copolymer using same - Google Patents

Abstract

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Method for preparing catalyst composition for ethylene polymerization and method for preparing ethylene homopolymer or copolymer using same

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Claims (9)

Diluting the precursor composition of formula (II) with an inert carrier material, then partially activating with at least one alkyl aluminum compound of formula (III) and then treating with a halogenated boron compound of formula (IV) A method for producing a catalyst composition for ethylene polymerization, which can be represented by the following general formula (I). Mg _a Ti (OR) _b X _c Al _d (R ") _e X ' _f H _g [ED] _h B _i R ^v _j X" _3i-j (I) Mg _a Ti (OR) _b Al _0.33 X _c [ED] _h (II) Al _d (R ") _e X ' _f Hg (III) B _i R ^v _j X " _3-j (IV) Wherein R is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms or COR 'wherein R' is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms, and R "is 1 to 14 carbon atoms Is an aliphatic or aromatic hydrocarbon radical having a dog or OR "'wherein R"' is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms and X is selected from the group consisting of C1, Br, I and mixtures thereof ED is an organic electron donor compound selected from the group consisting of alkyl esters of aliphatic and aromatic acids, aliphatic ethers, cyclic ethers and aliphatic ketones, a is a number from 0.5 to 56, b is 0,1 or 2, c Is a number from 2 to 116, d is d '+ 0.33 (where d' is a number from l to 33), is a number from 0 to 1.5, g is 0 or and e is e + f + g is 3 Is a number such that h is from 2 to 85 And X ′ is Cl or OR ″, wherein R ″ and R are aliphatic or aromatic hydrocarbon radicals having 1 to 14 carbon atoms, the same or different, and X ″ in the group consisting of C1, Br and mixtures thereof I is selected, i is a number from 0.1 to 1, j is 0 or 1i when R ^v is an aliphatic or aromatic hydrocarbon radical, 0, 1 i or 2 i when R ^v is OR, and H is hydrogen. The method according to claim 1, wherein at least one magnesium compound having formula (V) and at least one titanium compound having formula (VI) are dissolved in at least one liquid organic electron donor compound to A solution of the precursor composition having formula (II) is formed, the precursor composition is diluted with an inert carrier, and then partially activated with at least one alkylaluminum compound of formula (III), and then A process for producing a catalyst composition for ethylene polymerization which can be represented by the following general formula (I), which is treated with a boron halide compound of (IV). MgX ₂ (V) Ti _w (OR) _x Al _y X _z (VI) Wherein R is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms or COR 'wherein R' is an aliphatic or aromatic hydrocarbon radical having 1 to 14 carbon atoms, w is 1, x Is 0,1 or 2, y is 1/3, z is 2 to 116 and X is selected from the group consisting of Cl, Br, 1 and mixtures thereof. The method of claim 1 or 2, wherein the precursor composition is prepared from TiC1 ₃ · 1/3 AlC1 ₃ , anhydrous MgCl ₂ and tetrahydrofuran. The method of claim 1, wherein the molar ratio of the alkyl aluminum compound and the titanium compound is 4: 1 or less when the precursor composition of the general formula (II) diluted with the inert carrier material is partially activated with the general formula (III). Method of producing a catalyst composition. The method of claim 4, wherein the molar ratio is less than 2: 1 0.1: 1. The molar ratio of the electron donor compound to the aluminum compound according to claim 1 or 2, when the precursor composition of formula (II) diluted with the inert carrier material is partially activated with the formula (III). Method for producing a catalyst composition, characterized in that 0.325 or more. The molar ratio of the boron halide compound and the electron donor compound in the catalyst precursor when the catalyst precursor material partially activated by the general formula (III) is again treated with the halogenated compound of the general formula (IV). Method for producing a catalyst composition, characterized in that 0.1: 1 to 0.7: 1. A mixture of ethylene and at least one alphaolefin having 3 to 8 carbon atoms is combined with the catalyst composition prepared by any one of claims 1 to 7 with a pressure of up to 2,000 psig, about 80 to about 90 ° C. And reacting in slurry phase in the presence of suitable hydrogen. The method of claim 8, wherein the melt flow rate ratio of the ethylene homo polymer or copolymer is 32 to 40 and the density is 0.91 to 0.97 g / cm ² . ※ Note: The disclosure is based on the initial application.