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A solid catalyst component, catalyst system and prepolymerized catalyst for olefin polymerization

A solid catalyst and olefin polymerization technology, applied in the field of olefin polymerization catalysts, can solve the problems of unstable compounds, unfavorable environmental protection and safety, strong corrosion, etc., and achieve the effect of improving polymerization activity, excellent comprehensive performance and high tacticity

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the existing olefin polymerization catalysts need to be improved in all aspects, and because of the use of highly corrosive and unstable compounds in the synthesis process, it is not conducive to environmental protection and safety.

Method used

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  • A solid catalyst component, catalyst system and prepolymerized catalyst for olefin polymerization
  • A solid catalyst component, catalyst system and prepolymerized catalyst for olefin polymerization
  • A solid catalyst component, catalyst system and prepolymerized catalyst for olefin polymerization

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Embodiment approach

[0036] According to one embodiment, the solid catalyst component comprises a reaction product of a magnesium compound, a titanium compound, and an internal electron donor compound, wherein the molar ratio of the magnesium compound, titanium compound, and internal electron donor compound can be 1:( 0.5~150): (0.02~0.5).

[0037] Wherein, the magnesium compound can be selected from magnesium dihalide, alkoxy magnesium, alkyl magnesium, hydrate or alcoholate of magnesium dihalide, and a halogen atom in the molecular formula of magnesium dihalide replaced by alkoxy or haloalkoxy At least one of the derivatives substituted by the group.

[0038] Preferably, the magnesium compound is a magnesium dihalide and / or an alcoholate of magnesium dihalide.

[0039] Further preferably, the magnesium compound is an alcoholate of magnesium dihalide.

[0040] In the present invention, the alcoholate of magnesium dihalide can be expressed as MgX 2 pR'OH, X is a halogen, preferably Cl; p repres...

Embodiment 1～5 and comparative example 1

[0080] (1) Preparation of solid catalyst component a

[0081] In a 250mL reactor equipped with a reflux condenser, a mechanical stirrer and a thermometer and fully replaced by nitrogen, add 36.5mL of absolute ethanol and 21.3g of anhydrous magnesium chloride, heat up while stirring, and add 75mL of white oil after the magnesium chloride is completely dissolved. 75mL of silicone oil was kept at 120°C and stirred and mixed for 1 hour to obtain a mixture; in another 500mL reaction bottle with a high-speed stirrer, 112.5mL of white oil and the same volume of silicone oil were added in advance, preheated to 120°C, and the above The mixture was quickly pressed into the second reactor, maintained at 120°C and stirred at 3500rmp for 3 minutes; under stirring, the material was transferred to the third reactor that had previously added 1600mL hexane and cooled to -25°C until the transfer of the material was completed, and finally The temperature does not exceed 0°C; filter with suction,...

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Abstract

The invention provides a solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization. The solid catalyst component comprises magnesium, titanium, halogen and internal electron donor compounds, wherein the internal electron donor compounds are composed of a first internal electron donor compound as shown in a formula (I) which is described in the specificationand a second internal electron donor compound as shown in a formula (II) which is described in the specification; R1 in the formula is selected from a group consisting of C1-10 alkyl groups, C3-10 cycloalkyl groups and the like; R2 in the formula is selected from a group consisting of C1-10 alkyl groups, C1-10 ester groups, etc.; R3 in the formula is selected from a group consisting of C2-8 straight-chain alkyl groups, C5-10 cycloalkyl groups and the like; and R4 and R7 in the formula are independently selected from a group consisting of hydrogen, halogen, C3-10 branched-chain alkyl groups and the like. The catalyst including the solid catalyst component has improved polymerization activity and allows a polymer to have good overall performance when applied to olefin polymerization.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, in particular to a solid catalyst component, catalyst system and prepolymerization catalyst for olefin polymerization. Background technique [0002] It is well known that solid titanium catalyst components based on magnesium, titanium, halogen and electron donors can be used in the polymerization of ethylene and / or α-olefins, especially in α-olefins with 3 or more carbon atoms. Polymers with higher yield and higher stereoregularity can be obtained in olefin polymerization. Among them, the electron donor compound is one of the essential components in the catalyst components, and with the development of the internal electron donor compound, the polyolefin catalyst is constantly updated. At present, a large number of internal electron donor compounds have been disclosed, such as polycarboxylic acid, monocarboxylic acid ester or polycarboxylic acid ester, acid anhydride, ketone, monoet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/06C08F4/649C08F4/646C08F4/02
CPCC08F10/00C08F110/06C08F4/6494C08F4/6465C08F4/022C08F2500/15C08F2500/04
Inventor 李昌秀高明智刘海涛马晶陈建华蔡晓霞马吉星胡建军王军
Owner CHINA PETROLEUM & CHEM CORP
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