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Catalyst component for olefin polymerization, catalyst and preparation method thereof

A technology for olefin polymerization and catalysts, applied in the field of olefin polymerization catalysts, can solve the problems of low melt flow rate of polymers, and achieve the effects of good hydrogenation sensitivity, high melt flow rate, and high stereospecificity

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The patent publication CN101885789A discloses a catalyst component for olefin polymerization. The organophosphorus in the catalyst is an internal electron donor compounded by a glycol ester compound and an organic alcohol. The catalyst is used for olefin polymerization, especially propylene polymerization. Polymerization activity and isotacticity, but the melt flow rate of the polymer is relatively low

Method used

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  • Catalyst component for olefin polymerization, catalyst and preparation method thereof
  • Catalyst component for olefin polymerization, catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Preparation of catalyst solid components

[0046] In the reactor fully replaced by high-purity nitrogen, 4.8g of magnesium chloride, 97ml of toluene, 4ml of epichlorohydrin, and 12.5ml of tributyl phosphate were sequentially added, and the temperature was raised to 50°C under stirring and maintained for 2.5 hours. After the solid is completely dissolved, add 1.4 g of phthalic anhydride and keep it for 1 hour, cool the solution to below -25°C, add TiCl4 dropwise within 1 hour, slowly raise the temperature to 80°C, and add the electron donor compound 4-ethane 6 mmol of 3,5-heptanediol dibenzoate was maintained at 80°C for 1 hour. After filtering, add 70ml of toluene and wash twice. Add 60ml of toluene, TiCl 4 40ml, heated up to 110°C and maintained for 2 hours. After filtration, add toluene 60ml, TiCl 4 40ml, heated up to 110°C and maintained for 2 hours. After filtration, 80 ml of toluene and 2.66 g of tributyl phosphate were added, and the mixture was maintaine...

Embodiment 2

[0050] Same as Example 1, except that 0.67 g of tributyl phosphate is added when washing with toluene. Aggregated data are shown in Table 1.

Embodiment 3

[0052] With embodiment 1, difference is to add 1.33g triethyl phosphate when washing with toluene. Aggregated data are shown in Table 1.

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Abstract

The invention provides a catalyst component for olefin polymerization. The catalyst component contains magnesium, titanium, halogen, phosphorus and an internal electron donor compound. The phosphorus content is 0.3-3.0wt%, and the internal electron donor compound contains at least one diol ester compound selected from the general formula (I) shown in the description. The involved catalyst has high stereospecificity and very good hydrogen regulation sensitivity. When the catalyst is used for olefin polymerization, especially propylene polymerization, a product with high polymerization activity, a high isotactic index and a high melt flow rate can be obtained. The catalyst is especially suitable for preparation of products with a high melt flow rate and an enhanced isotactic index under a high hydrogen concentration condition.

Description

technical field [0001] The present invention relates to the field of olefin polymerization catalysts. Further, the present invention specifically relates to a catalyst component and catalyst for olefin polymerization containing magnesium, titanium, halogen, phosphorus and polyol ester. The present invention also relates to a process for preparing said olefin polymerization catalyst component. Background technique [0002] Stereoregularity and melt flow rate are two important indicators of polyolefins. Polyolefin products with high stereoregularity have high rigidity and crystallization properties, which are conducive to the production of high-strength products. Stereoregularity can usually be measured by isotactic index or xylene soluble content. Melt flow rate is a measure of a polymer's ability to flow under certain conditions. Melt flow rate provides an indicator of the processing properties of polymer resins, such as polymer resins must be softened or melted during e...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/654C08F4/651C08F10/02C08F10/06
Inventor 高明智张晓帆刘海涛马晶李昌秀王军蔡晓霞马吉星陈建华李现忠李季禹胡建军
Owner CHINA PETROLEUM & CHEM CORP
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