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Catalyst component for high temperature olefin polymerization, and preparation method thereof

A high-temperature polymerization and catalyst technology, which is applied in the field of catalysts and high-temperature polymerization of olefins, can solve the problems of complex operation, complex polymerization process, high-temperature polymerization activity and polymer isotacticity to be further improved.

Active Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In methods 3 and 4, in addition to Mg and ROH, other raw materials are needed, and the operation is also very complicated, so it is not advisable to use this method to obtain particulate matter
The catalyst also realizes the high-temperature polymerization of propylene by introducing a mixture of aluminoxane and alkylaluminum as a cocatalyst during the polymerization process. Therefore, there are also problems such as complicated polymerization process and the need to introduce new components, and high-temperature polymerization activity and polymers, etc. scale needs to be further improved

Method used

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  • Catalyst component for high temperature olefin polymerization, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Preparation of dialkoxymagnesium carrier

[0063] After the 16L pressure-resistant reactor with a stirrer was fully replaced with nitrogen, 10200 mL of ethanol, 300 mL of 2-ethylhexanol, 12 g of iodine and 8 g of magnesium chloride were added to the reactor to dissolve them. After stirring, the temperature was raised until the reflux temperature of the reaction system was reached; then 640 g of magnesium powder was added successively, and the reaction was carried out until no hydrogen gas was discharged. It is then washed, separated and dried. The dried dialkoxymagnesium carrier 1# was obtained.

[0064] (2) Preparation of catalyst components

[0065] Take the above-mentioned dialkoxymagnesium carrier 1#650g, 3250mL of toluene, and 130mL of di-n-butyl phthalate (DNBP) to prepare a suspension for use; Toluene 2600mL and titanium tetrachloride 3900mL, cool down to -5°C, then add the previously prepared suspension into the kettle, keep the temperature constant until...

Embodiment 2

[0071] Except that in (1) the preparation of the dialkoxymagnesium carrier, 300 ml of isopropanol was added and 300 ml of 2-ethylhexanol was not added, the others were the same as in Example 1.

Embodiment 3

[0073] Except that 130 mL of diisobutyl phthalate (DIBP) was added in the preparation of (2) catalyst component to replace 130 mL of di-n-butyl phthalate (DNBP), the others were the same as in Example 1.

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Abstract

The present invention relates to a catalyst component for high temperature olefin polymerization. According to the present invention, metal magnesium and an alcohol are adopted and are subjected to a reaction in the presence of a halogenating agent to prepare a spherical dialkyloxy magnesium carrier with an excellent performance; then the carrier, a titanium compound and an electron donor compound are subjected to a contact reaction in an inert diluent agent to obtain a high temperature polymerization solid catalyst component; and the solid catalyst component is adopted as a main catalyst, an organic aluminum compound is adopted as an auxiliary catalyst, and an organosilicon compound is adopted as a stereo orientation agent, wherein the resulting catalyst component is particularly suitable for propylene homopolymerization or copolymerization of propylene and other olefins. Polymerization results show that the catalyst of the present invention provides higher activity than the conventional catalyst, and the resulting polymer has characteristics of high melt index, high isotacticity, and low fine powder content. With the present invention, high performance resin products can be developed, and broad application prospects are provided.

Description

technical field [0001] The invention relates to a catalyst component used for high-temperature polymerization or copolymerization of olefins and a preparation method thereof, and a catalyst containing the catalyst component and its application in high-temperature polymerization of olefins. technical background [0002] Generally, olefin polymers are polymerized using a Ziegler-Natta catalyst composed of a titanium compound and an organoaluminum compound. For example, patents such as CN 85100997A and CN 1453298A use a solid catalyst component mainly composed of titanium, magnesium, chlorine and an electron donor compound, an organoaluminum compound as an auxiliary catalyst component, and a stereoregular catalyst component in the preparation of polypropylene. The catalyst of the alkoxy-organosilicon compound of the property-enhancing agent is obtained to obtain a propylene polymer. At present, the research on catalysts mainly focuses on the following aspects: improving the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F10/06C08F4/649C08F4/646C08F4/654C08F4/651
Inventor 徐秀东谭忠周奇龙严立安于金华李凤奎尹珊珊宋维玮
Owner CHINA PETROLEUM & CHEM CORP
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