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Propylene Polymerization Catalyst

A technology for propylene polymerization and catalyst, applied in the field of propylene polymerization catalyst composition, can solve the problems of low catalyst orientation ability and low activity, and achieve the effect of high catalytic activity and stereoregularity

Active Publication Date: 2017-02-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1954 Natta invented TiCl 3 / AlR 3 Polypropylene Ziegler-Natta (Z-N) catalyst, but at that time the catalyst orientation ability was low and the activity was very low

Method used

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  • Propylene Polymerization Catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Preparation of the catalyst: under anhydrous and oxygen-free conditions, 5.0 grams of microspherical magnesium chloride alcoholate particles (self-made, the preparation steps are the same as the document CN1110281A, the average particle size is 50 μm, and the specific surface is 150-300m 2 / g, the molar ratio of alcohol to magnesium chloride content is 2.76:1, molecular formula: MgCl 2 ·2.76CH 3 CH 2 OH) was added to 30 ml of titanium tetrachloride liquid at -20°C, and after 1 hour of reaction, the temperature was gradually raised to 60°C; 0.75g of 7-oxabicyclo[2.2.1]hept-5-ene-2,3 - dicarboximide, gradually warming up to 120°C, reacting for 2 hours, and filtering; adding 30 ml of titanium tetrachloride, reacting at 120°C for 1 hour, and filtering. Wash with 20 ml of hexane five times at 60° C., once at room temperature with 10 ml of hexane, and vacuum-dry to obtain the catalyst.

[0058] The content of each component in the catalyst is shown in Table 1.

[0059] Bu...

Embodiment 2～9

[0065] Preparation of the catalyst: In addition to the internal electron donor compound, N-ethyl-1-methyl-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboximide, N -Methyl-1-chloro-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboximide, 1-pentyl-7-oxabicyclo[2.2.1 ]hept-5-ene-2,3-dicarboximide, 1-phenyl-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboximide, N -Methyl-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboximide, N-butyl-1-ethyl-7-oxabicyclo[2.2. 1] Hept-5-ene-2,3-dicarboximide, the rest are the same as in Example 1. The content of each component in the catalyst is shown in Table 1.

[0066] Bulk polymerization: with embodiment 1. The aggregated relevant data are listed in Table 2.

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Abstract

The invention discloses a propylene polymerization catalyst. The propylene polymerization catalyst comprises an internal electron donor of which the molecular skeleton contains a 7-trioxiabicyclo [2.2.1]heptyl-5-en-2,3-dicarboximide compound which particularly conforms to the structural formula I shown in the description. Compared with the prior art, the amido bond and ether bond structures in the molecular skeleton of the compound of the electron donor can form a stable complex with Mg<2+> on the surface of a MgCl2 carrier more easily to facilitate adsorption of the internal electron donor on the surface of the MgCl2 carrier, so that the formation of random active centers is reduced; the catalyst shows higher catalytic activity and stereoregularity when used for propylene polymerization; the compound of the electron donor can be easily prepared through one-step reaction, so that the application advantage of the compound as the electron donor is reflected. The formula (I) is as shown in the specification.

Description

technical field [0001] The invention relates to a propylene polymerization catalyst, in particular to the composition of the propylene polymerization catalyst containing a specific internal electron donor compound. Background technique [0002] Polypropylene is one of the fastest growing polyolefin materials, and its output is second only to polyethylene in the world. In 1954 Natta invented TiCl 3 / AlR 3 Polypropylene Ziegler-Natta (Z-N) catalyst, but at that time the catalyst orientation ability was low and the activity was very low. By the middle and late 1960s, certain Lewis bases (called internal electron donors) were mixed into titanium trichloride crystals by mechanical grinding or chemical methods, so that the surface area of ​​the catalyst was greatly increased, and the obtained polypropylene isotacticity reached 90-96%. People have gradually found that the electron donor introduced in the catalyst plays a key role in improving the performance of the catalyst. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/06C08F110/06C08F4/649C08F4/646
Inventor 谢克锋朱博超贾军纪宋赛楠李艳芹高琳黄安平王霞陈旭薛山刘小燕
Owner PETROCHINA CO LTD