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

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization, and can solve the problems of non-preparation, low isotacticity of polypropylene, poor stereospecificity, etc.

Active Publication Date: 2018-01-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN1580034A, CN1580035A, CN1580033A, CN1436766A and CN1552740A disclose the use of glycol ester compounds as electron donors for propylene polymerization Ziegler-Natta catalysts, which are characterized in that the molecular weight distribution is wider and the polymerization activity is higher. However, when containing carboxylic acid When the spherical catalyst of the electron donor in the glycol ester is used for the polymerization of propylene, the stereospecificity is poor, and the isotacticity of the obtained polypropylene is low.
[0007] Disclosed in CN1974612A is the application of a kind of phosphoric acid ester in polypropylene catalyst as internal electron donor, but the existence of a large amount of phosphoric acid esters in the catalyst will finally bring the problem of aftertreatment
The catalyst is used for the polymerization of propylene and cannot produce products with high melt flow rate and high isotacticity at the same time

Method used

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

Examples

Experimental program
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preparation example Construction

[0041] In the present invention, the magnesium source can be various magnesium-containing compounds that can be used as catalysts for olefin polymerization, for example, the magnesium source can be magnesium halide, magnesium alcoholate or halogenated alcoholate and magnesium halide adduct The magnesium halide can be, for example, magnesium chloride and / or magnesium bromide; the magnesium alcoholate can be, for example, diethoxymagnesium; Magnesium; the type of the magnesium halide adduct carrier is known to those skilled in the art, for example, the disclosed magnesium halide adduct carrier such as CN1091748A, CN101050245A, CN101486722A, 201110142357.X, 201110142156.X and 201110142024.7, and these patents The relevant content of the disclosure is fully incorporated into this application as a reference. The specific preparation method of the magnesium halide adduct carrier may include the following steps: mixing the components forming the magnesium halide adduct, heating and r...

Embodiment approach

[0046] According to a preferred embodiment of the present invention, the amount of the magnesium source, the titanium source and the internal electron donor is such that, based on the total weight of the catalyst component, the phosphorus content in the catalyst component is 0.002- 0.05% by weight, preferably 0.005-0.04% by weight.

[0047] Specifically, the reaction between the magnesium source and the titanium source can be carried out in the same manner as in the prior art, for example, the titanium source can be cooled below 0°C (preferably -5 to -25°C), and then the magnesium source is added, Stir and mix at this temperature for 10-60 minutes, then raise the temperature to the reaction temperature (ie about 60-130° C.), and maintain at the reaction temperature for 0.5-10 hours. In the preparation method of the catalyst component for olefin polymerization, the internal electron donor is added within one or more periods of time before, during and after the reaction of the m...

Embodiment 1

[0070] This example is used to illustrate the catalyst component for olefin polymerization and its preparation method, catalyst for olefin polymerization and application of the present invention.

[0071] (1) Preparation of catalyst components

[0072] In a 300ml glass reaction bottle, add 90ml (820mmol) of titanium tetrachloride and cool to -20°C, add 37mmol of magnesium halide carrier (prepared according to the method disclosed in CN1330086A Example 1) in terms of magnesium element, wherein, Then the temperature was raised to 110°C, and 0.3mmol of tributyl phosphate and 7.3mmol of 2-isopropyl-2-isopentyl-1,3-dimethoxypropane were added during the temperature rise, and maintained at 110°C After 30 minutes, the liquid was filtered off, washed twice with titanium tetrachloride and five times with hexane, and dried in vacuum to obtain the catalyst component Cat-1 for olefin polymerization.

[0073] As measured by X-ray fluorescence spectroscopic analysis, the phosphorus content...

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Abstract

The present invention relates to the field of olefin polymerization, and particularly provides a catalyst component for olefin polymerization, and a preparation method thereof, and a catalyst for olefin polymerization, and applications thereof. The catalyst component for olefin polymerization contains the product obtained by carrying out a reaction on a magnesium source, a titanium source and an internal electron donor, wherein the internal electron donor contains a phosphate compound and a diether compound, and by using the total weight of the catalyst component as the reference, the phosphorus content (calculated as the phosphorus element) in the catalyst component is not more than 0.06 wt%. According to the present invention, the catalyst component does not contain phthalate compounds (plasticizers), has high hydrogen response sensitivity and high stereospecificity, and can be used in olefin polymerization so as to obtain the polymer having narrow molecular weight distribution.

Description

technical field [0001] The present invention relates to the field of olefin polymerization, in particular to a catalyst component for olefin polymerization, a preparation method for the catalyst component, a catalyst component for olefin polymerization prepared by the method, and a catalyst component containing the catalyst component for A catalyst for olefin polymerization, and the application of the catalyst for olefin polymerization in olefin polymerization. Background technique [0002] In plastic processing, melt flow rate is an important index used to measure the fluidity of plastic melt, and it is also an important reference for selecting plastic processing materials and grades. The melt flow rate depends largely on the molecular weight of the polymer, with low molecular weight polymers having a high melt flow rate. In order to obtain an olefin polymer with a high melt flow rate, it is generally necessary to add a large amount of hydrogen during polymerization, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/649
Inventor 赵瑾夏先知刘月祥谭扬任春红彭人琪凌永泰高富堂李威莅陈龙
Owner CHINA PETROLEUM & CHEM CORP
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