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Catalyst components and catalysts for olefin polymerization and their use and olefin polymerization process

A technology for olefin polymerization and catalysts, which is applied in the field of olefin polymerization catalysts and olefin polymerization, and can solve problems such as inability to prepare spherical carriers, poor stereospecificity, and carrier adhesion.

Active Publication Date: 2022-05-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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, but 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.
[0006] 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
However, the catalyst carrier prepared by this method has the disadvantages of unstable preparation process, easy carrier adhesion, poor carrier molding effect and wide particle size distribution.
[0011] The magnesium chloride alcoholate carrier cannot prepare a spherical carrier with a particle size less than 20 microns due to its characteristics, and the above method cannot obtain a carrier with the same particle size

Method used

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  • Catalyst components and catalysts for olefin polymerization and their use and olefin polymerization process
  • Catalyst components and catalysts for olefin polymerization and their use and olefin polymerization process
  • Catalyst components and catalysts for olefin polymerization and their use and olefin polymerization process

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0125] This preparation example is used to illustrate the spherical carrier of the olefin polymerization catalyst used in the present invention and the preparation method thereof.

[0126] In a 0.6L reactor, add 8.0g (0.08mol) magnesium chloride, 56mL (0.96mol) ethanol, 1g (0.03mol) α-sulfur, 1g PVP (polyvinylpyrrolidone) as a surfactant, and heat up to 90 ℃, after 2 hours of constant temperature reaction, add 38 mL (0.48 mol) of epichlorohydrin, continue the constant temperature reaction at 90 ℃ for half an hour, filter by pressure, wash the filter press product with hexane for 5 times, and finally vacuum dry the product to obtain olefin Polymerization catalyst spherical carrier Z1.

[0127] The olefin polymerization catalyst spherical carrier Z1 had an average particle diameter (D50) of 15 microns and a particle size distribution ((D90-D10) / D50) of 0.6. like figure 1 As shown, the olefin polymerization catalyst spherical carrier Z1 has a relatively regular particle morphol...

preparation example 2

[0131] This preparation example is used to illustrate the spherical carrier of the olefin polymerization catalyst used in the present invention and the preparation method thereof.

[0132] In the 0.6L reactor, add 300mL white oil, 8.0g (0.08mol) magnesium chloride, 28mL (0.48mol) ethanol, 0.3g (0.009mol) β-sulfur, 1g PVP (polyvinylpyrrolidone) as surfactant, The temperature was raised to 100 °C under stirring, and 12.5 mL (0.16 mol) of epichlorohydrin was added after the constant temperature reaction for 1 hour. After continuing the constant temperature reaction at 100 °C for 20 minutes, pressure filtration was performed, and the filter press product was washed with hexane for 5 times. Vacuum drying to obtain olefin polymerization catalyst spherical carrier Z2.

[0133] The olefin polymerization catalyst spherical carrier Z2 had an average particle diameter (D50) of 18 microns and a particle size distribution ((D90-D10) / D50) of 0.7. The particle morphology of the olefin polym...

preparation example 3

[0137] This preparation example is used to illustrate the spherical carrier of the olefin polymerization catalyst used in the present invention and the preparation method thereof.

[0138] In the 0.6L reactor, add 300mL white oil, 8.0g (0.08mol) magnesium chloride, 28mL (0.48mol) ethanol, 0.2g (0.006mol) α-sulfur, 1g PVP (polyvinylpyrrolidone) as surfactant, The temperature was raised to 100 °C under stirring, and 12.5 mL (0.16 mol) of epichlorohydrin was added after the constant temperature reaction for 1 hour. After continuing the constant temperature reaction at 100 °C for 20 minutes, pressure filtration was performed, and the filter press product was washed with hexane for 5 times. Vacuum drying to obtain olefin polymerization catalyst spherical carrier Z3.

[0139] The olefin polymerization catalyst spherical carrier Z3 had an average particle diameter (D50) of 20 microns and a particle size distribution ((D90-D10) / D50) of 0.8. The particle morphology of the olefin polym...

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Abstract

The invention belongs to the field of catalysts, and relates to a catalyst component for olefin polymerization, a catalyst and its application and an olefin polymerization method. The catalyst component contains the reaction product of the following components: (1) a solid component; (2) at least one titanium compound; and (3) an internal electron donor compound; wherein the solid component is at least one compound containing A magnesium compound of sulfur; the internal electron donor compound contains an internal electron donor compound a and an internal electron donor compound b, the internal electron donor compound a is a phosphoric acid ester compound, and the internal electron donor compound b is di The ether compound is based on the total weight of the catalyst component, and the phosphorus content in the catalyst component calculated as phosphorus element is not more than 0.06% by weight. By adopting the scheme of the present invention, the hydrogen adjustment sensitivity and stereospecificity of the catalyst can be effectively improved.

Description

technical field [0001] The invention belongs to the field of catalysts, and more particularly, relates to a catalyst component for olefin polymerization, a catalyst for olefin polymerization containing the catalyst component, the application of the catalyst component and the catalyst, and an olefin polymerization method. Background technique [0002] It is well known that solid titanium-based catalyst components based on magnesium, titanium, halogen and electron donors have high polymerization activity when used in olefin polymerization, especially in propylene polymerization. Among them, the electron donor compound is one of the indispensable components in the catalyst component, which plays a decisive role in important indicators such as polymerization activity, polymer isotacticity, molecular weight and molecular weight distribution. Development, polyolefin catalysts are constantly updated. [0003] CN1236374A, CN1714105A and CN1306544A disclose a series of aliphatic di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649
CPCC08F10/00C08F110/06C08F4/6497C08F4/6498Y02P20/52
Inventor 赵瑾夏先知刘月祥凌永泰谭扬李威莅高富堂任春红陈龙刘涛
Owner CHINA PETROLEUM & CHEM CORP