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Catalyst ingredient and catalyst used for ethylene polymerization or copolymerization

A catalyst and copolymerization technology, applied in the field of catalyst components and catalysts for ethylene polymerization or copolymerization, can solve the problems of poor hydrogen-adjustment sensitivity of catalysts, wide polymer particle size distribution, and low activity.

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN85100997A discloses a catalyst for olefin polymerization, which is formed by dissolving magnesium halide in organic epoxy compounds and organic phosphorus compounds to form a uniform solution, and then with at least one precipitation aid, a polycarboxylic acid ester electron donor and a transition It is prepared by the action of metal titanium halides and their derivatives. When the catalyst is used for the polymerization of propylene, it shows high polymerization activity and good stereospecificity, but when it is used for the polymerization of ethylene, the activity is low, and the polymer The particle size distribution of the catalyst is wide, and the hydrogen adjustment sensitivity of the catalyst is not good

Method used

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  • Catalyst ingredient and catalyst used for ethylene polymerization or copolymerization

Examples

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Effect test

Embodiment 1

[0042] 1. Preparation of catalyst components

[0043] Under the protection of nitrogen, 4.8 grams of magnesium chloride, 90 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate, and 0.5 ml of ethanol were added to the reaction kettle, and at a stirring speed of 450 rpm and a temperature of 60 ° C, After reacting for two hours, add 1.5 grams of titanium trichloride and 1.4 grams of phthalic anhydride, continue the reaction for one hour, cool down to -28°C, add 56 ml of titanium tetrachloride dropwise, gradually raise the temperature to 85°C, and keep the temperature constant for one hour. The mother liquor was filtered off, washed several times with the inert diluent toluene and the organic solvent hexane, and then dried to obtain a solid A containing magnesium / titanium.

[0044] Add 10ml of tetrabutoxytitanium and 10ml of tetrahydrofuran into the dissolution kettle, stir evenly, then add 1g of titanium trichloride, and dissolve at ...

Embodiment 2

[0050] Add 5ml of tetrabutoxytitanium and 10ml of tetrahydrofuran into the dissolution kettle, stir evenly, then add 1g of titanium trichloride, and dissolve at a stirring speed of 450rpm to form titanium compound solution D.

[0051] In the reaction kettle, add 11 grams of solid A prepared in Example 1, add 100 ml of isopentane, and add 10 ml of titanium compound solution D dropwise under the conditions of stirring at 200 rpm and a temperature of 10°C. React at room temperature for one hour, filter the solution, and wash twice with hexane, then add 60ml of isopentane, and react for one hour with 3.5 ml of diethylaluminum chloride solution with a volume concentration of 26.43%, and obtain a granular catalyst through evaporation and drying The solid component E is 15.5 g, which contains 1.80% by weight of titanium, 13.56% by weight of Mg, 0.257% of aluminum and 28.33% by weight of tetrahydrofuran.

[0052] Polymerization evaluation conditions are the same as in Example 1, and t...

Embodiment 3

[0054] Add 3ml of tetrabutoxytitanium and 10ml of tetrahydrofuran into the dissolution kettle, stir evenly, then add 1g of titanium trichloride, and dissolve at a stirring speed of 450rpm to form a titanium compound solution F.

[0055] In the reaction kettle, add 11 grams of the solid A prepared in Example 1, add 100 ml of isopentane, and add 10 ml of titanium compound solution F dropwise under the conditions of stirring 200 rpm and a temperature of 10°C. React for one hour at room temperature, filter the solution, and wash twice with hexane, then add 60ml of isopentane, and react for one hour with 3.5ml of diethylaluminum chloride solution with a volume concentration of 26.43%, and obtain a granular solid through evaporation and drying Component G is 14.9 g, which contains 1.82% by weight of titanium, 12.75% by weight of magnesium, 0.55% by weight of aluminum, and 27.79% by weight of tetrahydrofuran.

[0056] Polymerization evaluation conditions are the same as in Example 1,...

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Abstract

The invention relates to a catalyst ingredient used for ethylene polymerization or copolymerization. The catalyst ingredient is characterized in that: the catalyst ingredient is obtained via loading a magnesium / titanium-containing solid material with at least one inorganic titanium compound, at least one organic titanium compound, at least one electron donor compound, and at least one activator. The magnesium / titanium-containing solid material is prepared by following steps: a magnesium compound is dissolved in a solvent system containing an alcohol compound, an organic epoxy compound, and an organic phosphorous compound so as to obtain a uniform solution; a halide of transition metal titanium or a derivative thereof is added for mixing; and the magnesium / titanium-containing solid material is obtained via precipitation in the presence of a precipitation accessory ingredient mixture. The magnesium / titanium-containing solid material is selected as a carrier, so that when the catalyst ingredient is used for ethylene polymerization, catalyst activity and hydrogen response are relatively high; an obtained polymer is low in fine powder content; the catalyst ingredient is suitable for ethylene slurry polymerization or gas phase polymerization, and is especially suitable for ethylene gas phase fluidized bed polymerization technology in which the catalyst is charged in a slurry form.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization or copolymerization, its preparation method and its application in ethylene polymerization. Background technique [0002] In the polymerization of olefins, especially in the homopolymerization of ethylene or the copolymerization of ethylene and α-olefin, catalyst components with magnesium, titanium, halogen and electron donor as basic components are mostly used. When this type of catalyst is used in a gas-phase fluidized bed polymerization process, in order to ensure that the catalyst particle shape and particle size distribution are more suitable for fluidized state operation, the above catalyst components are usually supported on a carrier such as silica gel. For example: US4,302,565, US4,379,759 and CN 1064870A disclose catalysts for gas-phase fluidized bed reactions, which are impregnated with matrix components prepared from titanium compounds, magnesium compounds and...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/649C08F4/645C08F4/658C08F4/651C08F110/02C08F210/16C08F2/34C08F2/06
Inventor 寇鹏周俊领马永华杨岭李秉毅黄庭
Owner CHINA PETROLEUM & CHEM CORP
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