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

A solid catalyst, a technology for olefin polymerization, applied in the field of olefin polymerization catalysts, can solve problems such as unfavorable environmental protection and safety, unstable compounds, strong corrosiveness, etc., and achieve the effects of excellent comprehensive performance, improved polymerization activity, and high stereoregularity.

Active Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As mentioned above, 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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Experimental program
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Effect test

Embodiment approach

[0033] According to one embodiment, the solid catalyst component comprises a reaction product of a magnesium compound, a titanium compound and the internal electron donor compound, wherein the molar ratio of the magnesium compound, the titanium compound and the internal electron donor compound can be 1:( 0.5~150): (0.02~0.5).

[0034] 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.

[0035] Preferably, the magnesium compound is a magnesium dihalide and / or an alcoholate of magnesium dihalide.

[0036] Further preferably, the magnesium compound is an alcoholate of magnesium dihalide.

[0037] The titanium compound may be selected from titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, tetrabutoxytitani...

Embodiment 1～5 and comparative example 1

[0077] (1) Preparation of solid catalyst component a

[0078] Under nitrogen protection, add 4.8g of anhydrous magnesium chloride, 19.5g of isooctyl alcohol and 19.5g of decane solvent into a 500mL reactor equipped with a stirrer, heat to 130°C, and react for 1.5 hours until the magnesium chloride is completely dissolved, then add 1.1g Phthalic anhydride, continue to react at 130°C for 1 hour to obtain an alcoholate; cool the alcoholate to room temperature.

[0079] Under the protection of nitrogen, the above alcoholate was added dropwise to 120mL titanium tetrachloride solution pre-cooled to -22°C, and the temperature was slowly raised to 100°C, and 6 mmol of the compound internal electron donor compound in Table 1 was added, and the temperature was raised to 110°C was maintained for 2 hours, and the mixture was filtered while hot. Then add another 120mL of titanium tetrachloride, raise the temperature to 110° C. to react for 1 hour, filter, wash the solid particles 4 times ...

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Abstract

The invention provides a solid catalyst component, a catalyst system and a prepolymerized catalyst for olefin polymerization, the solid catalyst component comprises magnesium, titanium, halogen and an internal electron donor compound, the internal electron donor compound comprising the formula The second internal electron donor compound shown in the first internal electron donor compound shown in (I) and the formula (II); R 1 from C 1 ~C 10 Alkyl, C 3 ~C 10 Cycloalkyl etc.; R 2 selected from hydrogen, halogen, C 1 ~C 10 Alkyl, C 1 ~C 10 Alkoxy etc., R 3 and R 4 each selected from the following substituted or unsubstituted groups: C 1 ~C 10 straight chain alkyl, C 3 ~C 15 branched chain alkyl, etc., R 3 and R 4 Can be optionally bonded to form a ring or not. The catalyst including the solid catalyst component of the present invention not only has high polymerization activity, but also makes the polymer have good overall performance.

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): C08F10/00C08F4/649C08F4/654C08F4/646C08F110/06
CPCC08F10/00C08F110/06C08F4/6494C08F4/6543C08F4/6465C08F2500/04C08F2500/15
Inventor 李昌秀蔡晓霞高明智马吉星马晶陈建华刘海涛王军胡建军段瑞林
Owner CHINA PETROLEUM & CHEM CORP
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