Catalyst component for ethylene polymerization, and catalyst thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of olefin polymerization, can solve the problems that the shape of polymer particles is not ideal and cannot fully meet the needs of industrial production, and achieve the effects of reducing the amount of addition, improving the sensitivity of hydrogen adjustment, and increasing the bulk density

Active Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the prepared catalyst component is used for ethylene polymerization, the catalytic activity of the catalyst is relatively high, and the shape of the catalyst particle is also improved to a certain extent compared with the catalyst component in the Chinese patent CN1229092A, but because the polymer particle shape is not ideal enough, it still cannot fully meet the industrial production needs

Method used

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  • Catalyst component for ethylene polymerization, and catalyst thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of catalyst components: in the reactor fully replaced by high-purity nitrogen, add ethanol, magnesium powder and iodine successively, after reacting for about 6h, wash with toluene, dry to obtain white solid powder (specific implementation method See patent JP3074341). Take 6g of magnesium complex and add it to the reactor that has been fully replaced by high-purity nitrogen, then add 90ml of toluene, 5.0ml of epichlorohydrin, and 10.0ml of tributyl phosphate, and heat up to 70°C under stirring. When the solid is completely dissolved and forms a uniform The solution was reacted at 70°C for 1 hour. Then the system was cooled to -10°C, 80ml of titanium tetrachloride was slowly added dropwise, and then 5.0ml of ethyl orthosilicate was added to react for 1 hour. Slowly heat up to 80°C and react for 2 hours. Stop stirring, let it stand, the suspension will quickly separate into layers, remove the upper clear layer, wash twice with toluene, wash four times w...

Embodiment 2

[0033] (1) The synthesis of catalyst is the same as in Example 1. The amount of magnesium complex was changed to 5.0g, and the amount of ethyl orthosilicate was changed from 5.0ml to 4.0ml.

[0034] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0036] (1) The synthesis of catalyst is the same as in Example 1. The amount of magnesium complex was changed to 4.0g.

[0037] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

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Abstract

The invention relates to a catalyst component for ethylene polymerization. The catalyst component is characterized in that the preparation method of the catalyst component comprises the following steps: reacting an alcohol compound with metallic magnesium powder to generate a magnesium compound, washing by an inert solvent, drying to obtain white powder, dissolving the white solid powder in an organic epoxy compound and an organophosphorus compound to form a uniform solution, and reacting the uniform solution with a titanium compound in the presence of a precipitation aid which is an organosilicon compound containing no reactive hydrogen to obtain the catalyst component. A catalyst prepared through using the catalyst component has the advantages of high polymerization activity, high hydrogen response and high bulk density because of the selection of the alkyloxy magnesium compound as a carrier when the catalyst is used for the ethylene polymerization. Polymers synthesized through the catalyst especially have the advantages of concentrated particle size distribution and good degree of sphericity.

Description

technical field [0001] The invention relates to a catalyst component for ethylene polymerization, a preparation method, a catalyst composed of the catalyst component and its application in ethylene polymerization, belonging to the field of olefin polymerization. technical background [0002] As we all know, the catalyst system containing Ti / Mg composite plays a dominant role in the industrial production of polyethylene, and the research focus is on the catalyst's polymerization activity, hydrogen sensitivity, copolymerization performance, catalyst particle shape and particle size distribution, etc. For the performance of the above-mentioned polyolefin catalyst, the carrier of the catalyst plays a very important role. In the existing Z-N polyolefin catalyst system, the magnesium chloride carrier occupies a pivotal position. As more and more petrochemical manufacturers have higher requirements for polyolefin catalysts, magnesium alkoxide supports have received more and more a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/646C08F4/658C08F4/654C08F4/656
Inventor 苟清强郭子芳周俊领王洪涛张韬毅杨红旭俸艳芸李颖徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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